The document compares the query execution plans produced by Apache Hive and PostgreSQL. It shows that Hive's old-style execution plans are overly verbose and difficult to understand, providing many low-level details across multiple stages. In contrast, PostgreSQL's plans are more concise and readable, showing the logical query plan in a top-down manner with actual table names and fewer lines of text. The document advocates for Hive to adopt a simpler execution plan format similar to PostgreSQL's.
Performance Optimizations in Apache ImpalaCloudera, Inc.
Apache Impala is a modern, open-source MPP SQL engine architected from the ground up for the Hadoop data processing environment. Impala provides low latency and high concurrency for BI/analytic read-mostly queries on Hadoop, not delivered by batch frameworks such as Hive or SPARK. Impala is written from the ground up in C++ and Java. It maintains Hadoop’s flexibility by utilizing standard components (HDFS, HBase, Metastore, Sentry) and is able to read the majority of the widely-used file formats (e.g. Parquet, Avro, RCFile).
To reduce latency, such as that incurred from utilizing MapReduce or by reading data remotely, Impala implements a distributed architecture based on daemon processes that are responsible for all aspects of query execution and that run on the same machines as the rest of the Hadoop infrastructure. Impala employs runtime code generation using LLVM in order to improve execution times and uses static and dynamic partition pruning to significantly reduce the amount of data accessed. The result is performance that is on par or exceeds that of commercial MPP analytic DBMSs, depending on the particular workload. Although initially designed for running on-premises against HDFS-stored data, Impala can also run on public clouds and access data stored in various storage engines such as object stores (e.g. AWS S3), Apache Kudu and HBase. In this talk, we present Impala's architecture in detail and discuss the integration with different storage engines and the cloud.
Enabling the Active Data Warehouse with Apache KuduGrant Henke
Apache Kudu is an open source data storage engine that makes fast analytics on fast and changing data easy. In this presentation, Grant Henke from Cloudera will provide an overview of what Kudu is, how it works, and how it makes building an active data warehouse for real time analytics easy. Drawing on experiences from some of our largest deployments, this talk will also include an overview of common Kudu use cases and patterns. Additionally, some of the newest Kudu features and what is coming next will be covered.
Spark + Parquet In Depth: Spark Summit East Talk by Emily Curtin and Robbie S...Spark Summit
What if you could get the simplicity, convenience, interoperability, and storage niceties of an old-fashioned CSV with the speed of a NoSQL database and the storage requirements of a gzipped file? Enter Parquet.
At The Weather Company, Parquet files are a quietly awesome and deeply integral part of our Spark-driven analytics workflow. Using Spark + Parquet, we’ve built a blazing fast, storage-efficient, query-efficient data lake and a suite of tools to accompany it.
We will give a technical overview of how Parquet works and how recent improvements from Tungsten enable SparkSQL to take advantage of this design to provide fast queries by overcoming two major bottlenecks of distributed analytics: communication costs (IO bound) and data decoding (CPU bound).
Apache Impala is a complex engine and requires a thorough technical understanding to utilize it fully. Without proper configuration or usage, Impala’s performance becomes unpredictable, and end-user experience suffers. However, for many users and administrators, the right configuration of Impala is still a mystery.
Drawing on work with some of the largest clusters in the world, Manish Maheshwari shares ingestion best practices to keep an Impala deployment scalable and details admission control configuration to provide a consistent experience to end users. Manish also takes a high-level look at Impala’s query profile, which is used as a first step in any performance troubleshooting, and discusses common mistakes users and BI tools make when interacting with Impala. Manish concludes by detailing an ideal setup to show all of this in practice.
The first presentation for Kafka Meetup @ Linkedin (Bangalore) held on 2015/12/5
It provides a brief introduction to the motivation for building Kafka and how it works from a high level.
Please download the presentation if you wish to see the animated slides.
Building a Streaming Microservice Architecture: with Apache Spark Structured ...Databricks
As we continue to push the boundaries of what is possible with respect to pipeline throughput and data serving tiers, new methodologies and techniques continue to emerge to handle larger and larger workloads
Lessons from the Field: Applying Best Practices to Your Apache Spark Applicat...Databricks
This document discusses best practices for optimizing Apache Spark applications. It covers techniques for speeding up file loading, optimizing file storage and layout, identifying bottlenecks in queries, dealing with many partitions, using datasource tables, managing schema inference, file types and compression, partitioning and bucketing files, managing shuffle partitions with adaptive execution, optimizing unions, using the cost-based optimizer, and leveraging the data skipping index. The presentation aims to help Spark developers apply these techniques to improve performance.
Introduction to Apache NiFi dws19 DWS - DC 2019Timothy Spann
A quick introduction to Apache NiFi and it's ecosystem. Also a hands on demo on using processors, examining provenance, ingesting REST Feeds, XML, Cameras, Files, Running TensorFlow, Running Apache MXNet, integrating with Spark and Kafka. Storing to HDFS, HBase, Phoenix, Hive and S3.
Properly shaping partitions and your jobs to enable powerful optimizations, eliminate skew and maximize cluster utilization. We will explore various Spark Partition shaping methods along with several optimization strategies including join optimizations, aggregate optimizations, salting and multi-dimensional parallelism.
The document discusses intra-cluster replication in Apache Kafka, including its architecture where partitions are replicated across brokers for high availability. Kafka uses a leader and in-sync replicas approach to strongly consistent replication while tolerating failures. Performance considerations in Kafka replication include latency and durability tradeoffs for producers and optimizing throughput for consumers.
Optimizing Delta/Parquet Data Lakes for Apache SparkDatabricks
Matthew Powers gave a presentation on optimizing Delta and Parquet data lakes. He discussed the benefits of using Delta lakes such as built-in time travel, compacting, and vacuuming capabilities. Delta lakes provide these features for free on top of Parquet files and a transaction log. Powers demonstrated how to create, compact, vacuum, partition, filter, and update Delta lakes in Spark. He showed that partitioning data significantly improves query performance by enabling data skipping and filtering at the partition level.
The document provides an introduction and overview of Apache Kafka presented by Jeff Holoman. It begins with an agenda and background on the presenter. It then covers basic Kafka concepts like topics, partitions, producers, consumers and consumer groups. It discusses efficiency and delivery guarantees. Finally, it presents some use cases for Kafka and positioning around when it may or may not be a good fit compared to other technologies.
Hudi: Large-Scale, Near Real-Time Pipelines at Uber with Nishith Agarwal and ...Databricks
Uber has real needs to provide faster, fresher data to data consumers & products, running hundreds of thousands of analytical queries everyday. Uber engineers will share the design, architecture & use-cases of the second generation of ‘Hudi’, a self contained Apache Spark library to build large scale analytical datasets designed to serve such needs and beyond. Hudi (formerly Hoodie) is created to effectively manage petabytes of analytical data on distributed storage, while supporting fast ingestion & queries. In this talk, we will discuss how we leveraged Spark as a general purpose distributed execution engine to build Hudi, detailing tradeoffs & operational experience. We will also show to ingest data into Hudi using Spark Datasource/Streaming APIs and build Notebooks/Dashboards on top using Spark SQL.
Apache Tez - A New Chapter in Hadoop Data ProcessingDataWorks Summit
Apache Tez is a framework for accelerating Hadoop query processing. It is based on expressing a computation as a dataflow graph and executing it in a highly customizable way. Tez is built on top of YARN and provides benefits like better performance, predictability, and utilization of cluster resources compared to traditional MapReduce. It allows applications to focus on business logic rather than Hadoop internals.
Deep Dive into Spark SQL with Advanced Performance Tuning with Xiao Li & Wenc...Databricks
Spark SQL is a highly scalable and efficient relational processing engine with ease-to-use APIs and mid-query fault tolerance. It is a core module of Apache Spark. Spark SQL can process, integrate and analyze the data from diverse data sources (e.g., Hive, Cassandra, Kafka and Oracle) and file formats (e.g., Parquet, ORC, CSV, and JSON). This talk will dive into the technical details of SparkSQL spanning the entire lifecycle of a query execution. The audience will get a deeper understanding of Spark SQL and understand how to tune Spark SQL performance.
Actionable Insights with AI - Snowflake for Data ScienceHarald Erb
Talk @ ScaleUp 360° AI Infrastructures DACH, 2021: Data scientists spend 80% and more of their time searching for and preparing data. This talk explains Snowflake’s Platform capabilities like near-unlimited data storage and instant and near-infinite compute resources and how the platform can be used to seamlessly integrate and support the machine learning libraries and tools data scientists rely on.
Making Apache Spark Better with Delta LakeDatabricks
Delta Lake is an open-source storage layer that brings reliability to data lakes. Delta Lake offers ACID transactions, scalable metadata handling, and unifies the streaming and batch data processing. It runs on top of your existing data lake and is fully compatible with Apache Spark APIs.
In this talk, we will cover:
* What data quality problems Delta helps address
* How to convert your existing application to Delta Lake
* How the Delta Lake transaction protocol works internally
* The Delta Lake roadmap for the next few releases
* How to get involved!
This document provides a summary of techniques for optimizing performance with Impala. It discusses how to choose optimal data types, leverage partitioning for pruning, use the efficient Parquet format, gather statistics, order joins, validate join types, and monitor resources. The document recommends adopting these techniques, analyzing explains plans, and using the Impala debug web pages to optimize performance. It also provides information on joining the Impala community to test Impala.
Impala 2.0 - The Best Analytic Database for HadoopCloudera, Inc.
A look at why SQL access in Hadoop is critical and the benefits of a native Hadoop analytic database, what’s new with Impala 2.0 and some of the recent performance benchmarks, some common Impala use cases and production customer stories, and insight into what’s next for Impala.
A previous (OUTDATED) overview of resource management in Impala, relevant through Impala 2.2/CDH 5.4.
See the Cloudera documentation for the newest information: https://www.cloudera.com/documentation/enterprise/latest/topics/impala_howto_rm.html#impala_resource_management_example
This presentation is about our modification to the Cloudera Impala.
Our version can efficiently work with S3 as well as other remote DFS compatible storage
Achieving Mega-Scale Business Intelligence Through Speed of Thought Analytics...VMware Tanzu
SpringOne Platform 2016
Speaker: Ian Fyfe; Director, Product Marketing, Hortonworks
Apache Hadoop is the most powerful and popular platform for ingesting, storing and processing enormous amounts of “big data”. However, due to its original roots as a batch processing system, doing interactive business analytics with Hadoop has historically suffered from slow response times, or forced business analysts to extract data summaries out of Hadoop into separate data marts. This talk will discuss the different options for implementing speed-of-thought business analytics and machine learning tools directly on top of Hadoop including Apache Hive on Tez, Apache Hive on LLAP, Apache HAWQ and Apache MADlib.
Kudu: Resolving Transactional and Analytic Trade-offs in Hadoopjdcryans
Kudu is a new column-oriented storage system for Apache Hadoop that is designed to address the gaps in transactional processing and analytics in Hadoop. It aims to provide high throughput for large scans, low latency for individual rows, and database semantics like ACID transactions. Kudu is motivated by the changing hardware landscape with faster SSDs and more memory, and aims to take advantage of these advances. It uses a distributed table design partitioned into tablets replicated across servers, with a centralized metadata service for coordination.
Keep your hadoop cluster at its best! v4Chris Nauroth
Hadoop has become a backbone of many enterprises. While it can do wonders for businesses, it sometimes can be overwhelming for its operators and users. Amateurs as well as seasoned operators of Hadoop are caught unaware by common pitfalls of deploying, tuning and operating a Hadoop cluster. Having spent 5+ years working with 100s of Hadoop users, running clusters with 1000s of nodes, managing 10s of petabytes of data and running 100s of 1000s of tasks per day, we have seen people's unintentional acts, suboptimal configurations and common mistakes have resulted into downtimes, SLA violations, many hours of recovery operations and in some cases even data loss! Most of these traumas could have been easily avoided by applying easy to follow best practices that would protect data and optimize performance. In this talk we present real life stories, common pitfalls and most importantly, strategies on how to correctly deploy and manage Hadoop clusters. The talk will empower users and help make their Hadoop journey more fulfilling and rewarding. We will also discuss SmartSense. SmartSense can identify latent problems in a cluster and provide recommendations so that an operator can fix them before they manifest as a service degradation or outage.
Impala's low-latency SQL queries for HDFS files motivated improvements to HDFS to better support Impala's needs. These included exposing block replica disk locations, allowing co-located block replicas, in-memory caching of hot files, and reduced data copying during reads. The changes helped Impala achieve significantly faster performance than Hive for queries, especially complex queries, by optimizing I/O and data locality.
Real-time Big Data Analytics Engine using ImpalaJason Shih
Cloudera Impala is an open-source under Apache Licence enable real-time, interactive analytical SQL queries of the data stored in HBase or HDFS. The work was inspired by Google Dremel paper which is also the basis for Google BigQuery. It provide access same unified storage platform base on it's own distributed query engine but does not use mapreduce. In addition, it use also the same metadata, SQL syntax (HiveQL-like) ODBC driver and user interface (Hue Beeswax) as Hive. Besides the traditional Hadoop approach, aim to provide low-cost solution for resiliency and batch-oriented distributed data processing, we found more and more effort in the Big Data world pursuing the right solution for ad-hoc, fast queries and realtime data processing for large datasets. In this presentation, we'll explore how to run interactive queries inside Impala, advantages of the approach, architecture and understand how it optimizes data systems including also practical performance analysis.
Friction-free ETL: Automating data transformation with Impala | Strata + Hado...Cloudera, Inc.
Speaker: Marcel Kornacker
As data is ingested into Apache Hadoop at an increasing rate from a diverse range of data sources, it is becoming more and more important for users that new data be accessible for analysis as quickly as possible—because “data freshness” can have a direct impact on business results.
In the traditional ETL process, raw data is transformed from the source into a target schema, possibly requiring flattening and condensing, and then loaded into an MPP DBMS. However, this approach has multiple drawbacks that make it unsuitable for real-time, “at-source” analytics—for example, the “ETL lag” reduces data freshness, and the inherent complexity of the process makes it costly to deploy and maintain, and reduces the speed at which new analytic applications can be introduced.
In this talk, attendees will learn about Impala’s approach to on-the-fly, automatic data transformation, which in conjunction with the ability to handle nested structures such as JSON and XML documents, addresses the needs of at-source analytics—including direct querying of your input schema, immediate querying of data as it lands in HDFS, and high performance on par with specialized engines. This performance level is attained in spite of the most challenging and diverse input formats, which are addressed through an automated background conversion process into Parquet, the high-performance, open source columnar format that has been widely adopted across the Hadoop ecosystem.
In this talk, attendees will learn about Impala’s upcoming features that will enable at-source analytics: support for nested structures such as JSON and XML documents, which allows direct querying of the source schema; automated background file format conversion into Parquet, the high-performance, open source columnar format that has been widely adopted across the Hadoop ecosystem; and automated creation of declaratively-specified derived data for simplified data cleansing and transformation.
Cloudera Impala: A Modern SQL Engine for Apache HadoopCloudera, Inc.
Impala is a massively parallel processing SQL query engine for Apache Hadoop. It allows real-time queries on large datasets using existing SQL skills. Impala's architecture includes impalad daemons that process queries in parallel across nodes, a statestore for metadata coordination, and a new execution engine written in C++. It aims to provide faster performance than Hive for interactive queries while leveraging Hadoop's existing ecosystem. The first general availability release is planned for April 2013.
Cloudera Impala: The Open Source, Distributed SQL Query Engine for Big Data. The Cloudera Impala project is pioneering the next generation of Hadoop capabilities: the convergence of fast SQL queries with the capacity, scalability, and flexibility of a Apache Hadoop cluster. With Impala, the Hadoop ecosystem now has an open-source codebase that helps users query data stored in Hadoop-based enterprise data hubs in real time, using familiar SQL syntax.
This talk will begin with an overview of the challenges organizations face as they collect and process more data than ever before, followed by an overview of Impala from the user's perspective and a dive into Impala's architecture. It concludes with stories of how Cloudera's customers are using Impala and the benefits they see.
Hadoop & cloud storage object store integration in production (final)Chris Nauroth
Today's typical Apache Hadoop deployments use HDFS for persistent, fault-tolerant storage of big data files. However, recent emerging architectural patterns increasingly rely on cloud object storage such as S3, Azure Blob Store, GCS, which are designed for cost-efficiency, scalability and geographic distribution. Hadoop supports pluggable file system implementations to enable integration with these systems for use cases such as off-site backup or even complex multi-step ETL, but applications may encounter unique challenges related to eventual consistency, performance and differences in semantics compared to HDFS. This session explores those challenges and presents recent work to address them in a comprehensive effort spanning multiple Hadoop ecosystem components, including the Object Store FileSystem connector, Hive, Tez and ORC. Our goal is to improve correctness, performance, security and operations for users that choose to integrate Hadoop with Cloud Storage. We use S3 and S3A connector as case study.
SecPod: A Framework for Virtualization-based Security SystemsYue Chen
The OS kernel is critical to the security of a computer system. Many systems have been proposed to improve its security. A fundamental weakness of those systems is that page tables, the data structures that control the memory protection, are not isolated from the vulnerable kernel, and thus subject to tampering. To address that, researchers have relied on virtualization for reliable kernel memory protection. Unfortunately, such memory protection requires to monitor every update to the guest’s page tables. This fundamentally conflicts with the recent advances in the hardware virtualization support. In this paper, we propose SecPod, an extensible framework for virtualization-based security systems that can provide both strong isolation and the compatibility with modern hardware. SecPod has two key techniques: paging delegation delegates and audits the kernel’s paging operations to a secure space; execution trapping intercepts the (compromised) kernel’s attempts to subvert SecPod by misusing privileged instructions. We have implemented a prototype of SecPod based on KVM. Our experiments show that SecPod is both effective and efficient.
This document outlines the history and design proposals of Apache Drill from the OpenDremel team. It describes OpenDremel starting in 2010 with an initial implementation based on the Dremel paper. Over time, the design was found to be naive and was restarted with a new architecture called Dazo inspired by BigQuery. The document proposes several design tenets for Apache Drill including supporting multi-tenancy, being flexible and customizable, being efficient through the use of ZeroVM for sandboxing, and having a suggested architecture with a browser frontend and multi-tenant backend.
Apache Kudu (Incubating): New Hadoop Storage for Fast Analytics on Fast Data ...Cloudera, Inc.
This document provides an overview of Apache Kudu, an open source storage layer for Apache Hadoop that enables fast analytics on fast data. Some key points:
- Kudu is a columnar storage engine that allows for both fast analytics queries as well as low-latency updates to the stored data.
- It addresses gaps in the existing Hadoop storage landscape by providing efficient scans, individual row lookups, and mutable data all within the same system.
- Kudu uses a master-tablet server architecture with tablets that are horizontally partitioned and replicated for fault tolerance. It supports SQL and NoSQL interfaces.
- Integrations with Spark, Impala and MapReduce allow it to be used for both
Hadoop Distributed File System (HDFS) Encryption with Cloudera Navigator Key ...Cloudera, Inc.
This document provides an overview of Cloudera's Navigator Key Trustee, which is a key management server that acts as a proxy between CDH components and an external key store. It discusses how Key Trustee uses encryption zone keys stored in an external hardware security module to encrypt data encryption keys, which are then used to encrypt data at rest in HDFS. The document also covers Key Trustee's architecture, deployment considerations, access control lists, and troubleshooting steps.
Kudu is a storage engine for Hadoop designed to address gaps in Hadoop's ability to handle workloads that require both high-throughput data ingestion and low-latency random access. It is a columnar storage engine that uses a log-structured merge tree to store data and provides APIs for NoSQL and SQL access. Kudu aims to provide high performance for both scans and random access through its columnar design and tablet architecture that partitions data across servers.
NoSQL databases are non-relational databases designed for large volumes of data across many servers. They emerged to address scaling and reliability issues with relational databases. While different technologies, NoSQL databases are designed for distribution without a single point of failure and to sacrifice consistency for availability if needed. Examples include Dynamo, BigTable, Cassandra and CouchDB.
The document discusses various techniques for scaling databases and applications, including caching, replication, functional partitioning, sharding, batching, buffering, queuing, and background processing. It provides examples of when and how to implement these techniques, as well as considerations around caching policies, data distribution strategies, and managing asynchronous replication. The goal is to optimize performance and scalability through techniques that reduce round trips, parallelize operations, and distribute load across servers and databases.
The document discusses best practices for scalability and performance when developing PHP applications. Some key points include profiling and optimizing early, cooperating between development and operations teams, testing on production-like data, caching frequently accessed data, avoiding overuse of hard-to-scale resources, and using compiler caching and query optimization. Decoupling applications, caching, data federation, and replication are also presented as techniques for improving scalability.
This document provides a high-level overview of Impala, an open-source SQL query engine for Apache Hadoop. It describes how Impala addresses limitations of MapReduce by providing faster, more interactive queries using MPP (Massively Parallel Processing). Key points include that Impala runs directly on data files without ETL, uses a distributed query planner and execution engine for high performance, and supports commonly used file formats like Parquet for columnar storage.
Breaking The Clustering Limits @ AlphaCSP JavaEdge 2007Baruch Sadogursky
The document discusses the evolution of clustering in Java applications. It describes how early clustering solutions focused on replicating state between nodes for scalability and failover. More modern approaches use data grids, computational grids, and clustered virtual machines to distribute data and processing across nodes for improved performance and resource utilization. A variety of open source and commercial implementations are presented, including EHCache, GlassFish Shoal, Oracle Coherence, JBoss POJO Cache, GigaSpaces, and Terracotta.
Short and comprehensive manual to extend your local matlab with a high performance computing cluster of NVidia tesla's 2070 graphical processing units.
A Java Implementer's Guide to Better Apache Spark PerformanceTim Ellison
This document discusses techniques for improving the performance of Apache Spark applications. It describes optimizing the Java virtual machine by enhancing the just-in-time compiler, improving the object serializer, enabling faster I/O using technologies like RDMA networking and CAPI flash storage, and offloading tasks to graphics processors. The document provides examples of code style guidelines and specific Spark optimizations that further improve performance, such as leveraging hardware accelerators and tuning JVM heuristics.
Near Real time Indexing Kafka Messages to Apache Blur using Spark StreamingDibyendu Bhattacharya
My presentation at recently concluded Apache Big Data Conference Europe about the Reliable Low Level Kafka Spark Consumer I developed and an use case of real time indexing to Apache Blur using this consumer
The document discusses big data challenges and solutions. It describes how specialized systems like Hadoop are more efficient than relational databases for large-scale data. It provides examples of open source projects that can be used for tasks like storage, search, streaming data, and batch processing. The document also summarizes the design of the Voldemort distributed key-value store and how it was inspired by Dynamo and Memcached.
Datastage is an ETL tool with client-server architecture. It uses jobs to design data flows from source to target systems. A job contains source definitions, target definitions, and transformation rules. The main Datastage components include the Administrator, Designer, Director, and Manager clients and the Repository, Server, and job execution components. Jobs can be server jobs for smaller data volumes or parallel jobs for larger volumes and use of parallel processing. Stages define sources, targets, and processing in a job. Common stages include files, databases, and transformation stages like Aggregator and Copy.
Scalable Web Architectures: Common Patterns and Approaches - Web 2.0 Expo NYCCal Henderson
The document discusses common patterns and approaches for scaling web architectures. It covers topics like load balancing, caching, database scaling through replication and sharding, high availability, and storing large files across multiple servers and data centers. The overall goal is to discuss how to architect systems that can scale horizontally to handle increasing traffic and data sizes.
Voldemort & Hadoop @ Linkedin, Hadoop User Group Jan 2010Bhupesh Bansal
Jan 22nd, 2010 Hadoop meetup presentation on project voldemort and how it plays well with Hadoop at linkedin. The talk focus on Linkedin Hadoop ecosystem. How linkedin manage complex workflows, data ETL , data storage and online serving of 100GB to TB of data.
The document discusses Project Voldemort, a distributed key-value storage system developed at LinkedIn. It provides an overview of Voldemort's motivation and features, including high availability, horizontal scalability, and consistency guarantees. It also describes LinkedIn's use of Voldemort and Hadoop for applications like event logging, online lookups, and batch processing of large datasets.
Optimizing your java applications for multi core hardwareIndicThreads
Session Presented at 5th IndicThreads.com Conference On Java held on 10-11 December 2010 in Pune, India
WEB: http://J10.IndicThreads.com
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Rising power dissipation in microprocessor chips is leading to a trend towards increasing the number of cores on a chip (multi-core processors) rather than increasing clock frequency as the primary basis for increasing system performance. Consequently the number of threads in commodity hardware has also exploded. This leads to complexity in designing and configuring high performance Java applications that make effective use of new hardware. In this talk we provide a summary of the changes happening in the multi-core world and subsequently discuss about some of the JVM features which exploit the multi-core capabilities of the underlying hardware. We also explain techniques to analyze and optimize your application for highly concurrent systems. Key topics include an overview of Java Virtual Machine features & configuration, ways to correctly leverage java.util.concurrent package to achieve enhanced parallelism for applications in a multi-core environment, operating system issues, virtualization, Java code optimizations and useful profiling tools and techniques.
Takeaways for the Audience
Attendees will leave with a better understanding of the new multi-core world, understanding of Java Virtual Machine features which exploit mulit-core and the techniques they can apply to ensure their Java applications run well in mulit-core environment.
Architecting and productionising data science applications at scalesamthemonad
This document discusses architecting and productionizing data science applications at scale. It covers topics like parallel processing with Spark, streaming platforms like Kafka, and scalable machine learning approaches. It also discusses architectures for data pipelines and productionizing models, with a focus on automation, avoiding SQL databases, and using Kafka streams and Spark for batch and streaming workloads.
The document discusses scalable web architectures and common patterns for scaling web applications. It covers key topics like load balancing, caching, database replication, and data federation. The overall goal of application architecture is to scale traffic and data while maintaining high availability and performance. Horizontal scaling by adding more servers is preferable to vertical scaling of buying larger servers.
The document discusses scalable web architectures and common patterns for scaling web applications. It covers key topics like load balancing, caching, database replication and sharding, and asynchronous queuing to distribute workloads across multiple servers. The goal of these patterns is to scale traffic, data size, and maintainability through horizontal expansion rather than just vertical upgrades.
The document discusses scalable web architectures and common patterns for scaling web applications. It covers key topics like load balancing, caching, database replication and sharding, and asynchronous queuing to distribute workloads across multiple servers. The goal of these patterns is to scale traffic, data size, and maintainability through horizontal expansion rather than just vertical upgrades.
The document discusses different database architectures including master-slave, master-master, and MySQL cluster. Master-slave involves one master node that handles writes and multiple read-only slave nodes. Master-master allows writes and reads on all nodes but has weaker consistency. MySQL cluster provides high availability, no single point of failure, and automatic sharding but has some limitations. The author has compiled pros and cons of each and decided MySQL cluster is best for their use case.
BitLocker Data Recovery | BLR Tools Data Recovery SolutionsAlina Tait
BLR Tools provides an advanced BitLocker Data Recovery Tool specifically engineered to recover lost or inaccessible data from BitLocker-encrypted drives. Whether you're dealing with accidental deletion, encryption key problems, or system crashes, our cutting-edge software guarantees a secure and efficient recovery process. Rely on BLR Tools for dependable BitLocker data recovery and effortlessly restore access to your essential files.
Unlocking the Future of Artificial IntelligencedorinIonescu
Unlock the Future: Dive into AI Today! Videnda AI specializes in developing advanced artificial intelligence solutions, including visual dictionaries and language learning tools that leverage immersive virtual travel experiences. Stay Ahead of the Curve: Master AI Now! Our AI technology integrates machine learning and neural networks to enhance education and business applications. AI: The Next Frontier. Are You Ready to Explore? With a focus on real-time AI solutions and deep learning models, Videnda AI provides innovative tools for multilingual communication and immersive learning.
In this course, you'll find a series of engaging videos packed with vibrant animations that break down complex AI concepts into digestible pieces. Our curriculum covers AI models such as Convolutional Neural Networks (CNN), Multi-Layer Perceptrons (MLP), Generative Adversarial Networks (GAN), and Transformers, providing a solid understanding of these models and their real-world applications. We also offer hands-on experience with Generative AI tools like ChatGPT and Midjourney, and Python programming tutorials to help you implement AI algorithms and build your own AI applications.
We are proud participants in the Nvidia Inception Program, driving AI innovation across various industries. By the end of our course, you'll have a strong understanding of AI principles, enhanced Python programming skills, and practical experience with state-of-the-art Generative AI tools. Whether you're looking to kickstart a career in AI or simply curious about this revolutionary technology, Videnda AI is your partner in mastering the future of artificial intelligence.
Old Tools, New Tricks: Unleashing the Power of Time-Tested Testing ToolsBenjamin Bischoff
In the rapidly evolving landscape of software development and testing, it is tempting to chase the latest tools and technologies. However, some of the most effective solutions have been in existence for decades. In this talk, we’ll delve into the enduring value of these timeless testing tools.
We’ll explore how established tools like Selenium, GNU Make, Maven, and Bash remain vital in today’s software development and testing toolkit even though they have been around for a long time (some were even invented before I was born). I’ll share examples of how these tools have addressed our testing and automation challenges, showcasing their adaptability, versatility, and reliability in various scenarios. I aim to demonstrate that sometimes, the “old” ways can indeed be the best ways.
Fix Production Bugs Quickly - The Power of Structured Logging in Ruby on Rail...John Gallagher
Rails apps can be a black box. Have you ever tried to fix a bug where you just can’t understand what’s going on? This talk will give you practical steps to improve the observability of your Rails app, taking the time to understand and fix defects from hours or days to minutes. Rails 8 will bring an exciting new feature: built-in structured logging. This talk will delve into the transformative impact of structured logging on fixing bugs and saving engineers time. Structured logging, as a cornerstone of observability, offers a powerful way to handle logs compared to traditional text-based logs. This session will guide you through the nuances of structured logging in Rails, demonstrating how it can be used to gain better insights into your application’s behavior. This talk will be a practical, technical deep dive into how to make structured logging work with an existing Rails app.
I talk about the Steps to Observable Software - a practical five step process for improving the observability of your Rails app.
The SQDC (Safety, Quality, Delivery, Cost) process enhances manufacturing performance through daily safety meetings, defect tracking, and waste reduction. Orcalean’s FactoryKPI digital dashboard streamlines this process, providing real-time data and AI-powered analytics for continuous improvement.
BDRSuite - #1 Cost effective Data Backup and Recovery Solutionpraveene26
BDRSuite and BDRCloud by Vembu are comprehensive and cost-effective backup and disaster recovery solutions designed to meet the diverse data protection requirements of Businesses and Service Providers.
With BDRSuite & BDRCloud, you can backup diverse IT workloads from any location, including VMs (VMware, Hyper-V, KVM, Proxmox VE, oVirt), Servers & Endpoints (Windows, Linux, Mac), SaaS Applications (Microsoft 365, Google Workspace), Cloud VMs (AWS, Azure), NAS/File Shares and Databases & Applications (Microsoft Exchange Server, SQL Server, SharePoint Server, PostgreSQL, MySQL).
You can store backup anywhere like On-Premise/Remote storage, Private/Public Cloud, and BDRCloud.
You can centrally manage the entire backup infrastructure with BDRSuite’s self-hosted centralized management console (or) BDRCloud-hosted centralized management console.
You can quickly recover from data loss or ransomware attacks—all at an affordable price.
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Literals - A Machine Independent Feature21h16charis
Introduction to Literals, A machine independent feature. The presentation is based on the prescribed textbook for System Software and Compiler Design, Computer Science and Engineering - System Software by Leland. L. Beck,
D Manjula.
Get to know Autonomous 2.0, the latest innovation from Applitools, in this sneak peek session showcasing how our AI-powered testing solutions revolutionize how you create, debug, and manage test scripts. See more and sign up for a free trial at https://applitools.info/ml6
iBirds Services - Comprehensive Salesforce CRM and Software Development Solut...vijayatibirds
Unlock the full potential of your business with iBirds Services. As a trusted Salesforce Consulting Partner, iBirds Software Pvt. Ltd. offers a wide range of customer-centric consulting services to help you seamlessly integrate, customize, and optimize your Salesforce CRM. Our team of experts specializes in delivering innovative software development solutions tailored to meet your unique business needs.
In this document, you will discover:
An overview of iBirds Services and our expertise in Salesforce CRM implementation.
Detailed insights into our software development services, including custom applications, integrations, and automation.
Case studies highlighting our successful projects and satisfied clients.
Key benefits of partnering with iBirds Services for your CRM and software development needs.
Whether you are a small business or a large enterprise, our proven strategies and cutting-edge technologies ensure your business stays ahead of the competition. Explore our services and learn how iBirds can transform your business operations with scalable and efficient solutions.
Monitoring the Execution of 14K Tests: Methods Tend to Have One Path that Is ...Andre Hora
The literature has provided evidence that developers are likely to test some behaviors of the program and avoid other ones. Despite this observation, we still lack empirical evidence from real-world systems. In this paper, we propose to automatically identify the tested paths of a method as a way to detect the method’s behaviors. Then, we provide an empirical study to assess the tested paths quantitatively. We monitor the execution of 14,177 tests from 25 real-world Python systems and assess 11,425 tested paths from 2,357 methods. Overall, our empirical study shows that one tested path is prevalent and receives most of the calls, while others are significantly less executed. We find that the most frequently executed tested path of a method has 4x more calls than the second one. Based on these findings, we discuss practical implications for practitioners and researchers and future research directions.
Waze vs. Google Maps vs. Apple Maps, Who Else.pdfBen Ramedani
Let’s face it, getting lost isn’t really part of the adventure anymore (unless you’re into that sort of thing!). Nowadays, a good navigation app is like your trusty compass, guiding you through busy city streets and winding country roads. But with so many options out there—from big names like Waze, Google Maps, and Apple Maps to some lesser-known contenders—choosing the right one can feel a bit overwhelming.
Think about it: you're about to head out on a road trip, and the last thing you want is to end up in the middle of nowhere because you took a wrong turn. Or maybe you're just trying to navigate your daily commute without hitting every single red light. That's where a solid navigation app comes in handy.
Google Maps is like the old reliable friend who knows every shortcut and scenic route. It's packed with features, from real-time traffic updates to detailed directions, making it a top choice for many. But then there's Waze, the social butterfly of navigation apps. It's all about community, with drivers sharing real-time updates on traffic, accidents, and even speed traps. It’s perfect if you want to feel like you’re part of a huge driving club, all working together to get everyone to their destination faster.
And let’s not forget Apple Maps, which has come a long way since its rocky start. If you're deep into the Apple ecosystem, it's a seamless choice, integrating smoothly with all your devices and offering some pretty neat features like Flyover for 3D city views.
But wait, there are also some underdog apps worth considering! Have you heard of MapQuest? It's still around and offers some great features, especially for planning long trips with multiple stops. Then there's HERE WeGo, which is fantastic for offline navigation—a real lifesaver if you're heading somewhere with spotty cell service.
So, whether you're planning a cross-country adventure or just trying to find the quickest route to work, we’ll help you sift through these options. We’ll dive into what makes each app unique, their pros and cons, and ultimately, guide you to the perfect navigation app for your needs. Buckle up and get ready for a smooth ride!
In today's dynamic business landscape, ERP software systems are essential tools for businesses worldwide, including those in the UAE. These systems cater to the unique needs of the UAE's rapidly changing economy and expanding industries.
This blog examines the top 10 ERP companies in the UAE, highlighting their innovative products, exceptional customer support, and significant impact on the regional business community. These companies excel in providing ERP solutions that enhance efficiency and growth for businesses throughout the UAE.
1. **Odoo**
- Odoo ERP is a comprehensive business management solution with features like accounting, HR, sales, inventory control, and CRM. Its user-friendly interface simplifies processes and boosts productivity. Banibro IT Solutions leverages Odoo to transform business operations.
- **Details:**
- Suitable for: Small, Medium, Large Businesses
- Open Source: Yes
- Cloud-based: Yes (Cloud and On-premises)
- Support: Phone, Chat, Email
- Payment: Yearly, Monthly
- Multi-Language: Yes
- OS Support: Windows, Mac, iOS, Android
- API: Available
2. **Microsoft Dynamics 365**
- Dynamics 365 offers a centralized platform for small and medium-sized businesses, integrating with Microsoft apps and cloud services for scalability. It simplifies data processing with user-friendly interfaces and customizable reporting.
- **Details:**
- Suitable for: Small, Medium, Large Businesses
- Support: Phone, Chat, Email, Knowledge Base
- Payment: One-Time, Yearly, Monthly
- Multi-Language: No
- OS Support: Web App, Windows, iOS, Android
- API: Not specified
3. **FirstBIT ERP**
- Known for serving small and medium-sized businesses, FirstBIT ERP offers comprehensive solutions and exceptional customer service, enhancing productivity and efficiency.
- **Details:**
- Suitable for: Medium, Large Businesses
- Open Source: Yes/No
- Cloud-based: Yes (Cloud and On-premises)
- Support: Phone, Email, Video Tutorials
- Payment: Yearly, Monthly
- Multi-Language: Yes
- OS Support: Web App, Windows, Mac, iOS, Android
- API: Available
4. **Ezware Technologies**
- Ezware Technologies provides top-notch ERP solutions for various industries with user-friendly modules that streamline complex business processes.
- **Details:**
- Suitable for: Small, Medium, Large Businesses
- Support: Phone, Chat, Email, Knowledge Base
- Payment: One-Time, Yearly, Monthly
- Multi-Language: No
- OS Support: Web App, Windows, Mac, iOS, Android
- API: Not specified
5. **RealSoft**
- RealSoft by Coral is popular in Dubai, offering modules for contracting, real estate, job costing, manufacturing, trading, and finance. It's VAT-enabled and affordable for medium-sized businesses.
- **Details:**
- Suitable for: Small, Medium, Large Businesses
- Open Source: No
- Cloud-based: On-premises
-
Alluxio Webinar | What’s new in Alluxio Enterprise AI 3.2: Leverage GPU Anywh...Alluxio, Inc.
Alluxio Webinar
July.23, 2024
For more Alluxio Events: https://www.alluxio.io/events/
Speaker:
- Shouwei Chen (core maintainer and product manager, Alluxio)
In today's AI-driven world, organizations face unprecedented demands for powerful AI infrastructure to fuel their model training and serving workloads. Performance bottlenecks, cost inefficiencies, and management complexities pose significant challenges for AI platform teams supporting large-scale model training and serving. On July 9, 2024, we introduced Alluxio Enterprise AI 3.2, a groundbreaking solution designed to address these critical issues in the ever-evolving AI landscape.
In this webinar, Shouwei Chen will introduce exciting new features of Alluxio Enterprise AI 3.2:
- Leveraging GPU resources anywhere accessing remote data with the same local performance
- Enhanced I/O performance with 97%+ GPU utilization for popular language model training benchmarks
- Achieving the same performance as HPC storage on existing data lake without additional HPC storage infrastructure
- New Python FileSystem API to seamlessly integrate with Python applications like Ray
- Other new features, include advanced cache management, rolling upgrades, and CSI failover
4. Why do we care, about internals?
► SQL is declarative, no need for internals...
► In the same time, even small problems in
engine operation require good understanding of
its work principles to fix...
► It is hardly possible to optimize without
understanding algorithms under the hood.
► It is hard to make decisions about engine
suitability to future needs without knowing
technical limitations.
6. How to understand engine?
What it is doing?
Main principle of operation
Main building block
Operation sequence
Operation environment
Efficiency
Design decisions
Materials
Main problems and fixes
7. What it is doing
Impala is Relation engine. It executes SQL
queries.
Data is append-able only. There is no “Update” or
“Delete” statements.
8. Principle of operation
Main differentiators are:
Distribution of Query among nodes (MPP)
LLVM and Code generation. Impala is compiler.
Relay on HDFS
Use external metadata – hive metastore.
Parallel query capability (per node, per cluster).
9. Sequence of operation
Query parsing – translate SQL to AST(Abstract
syntax tree)
Match objects to metadata
Query planning – create physical execution plan.
In case of MPP – divide plan into plan fragments
for nodes.
Distribute plan fragments to nodes
Execute plan fragments.
10. Main building blocks
Front End. This is Java code which implements a
lot of logic with non-critical performance
- database objects
fe/src/main/java/com/cloudera/impala/analysis/
- execution plan parts :
fe/src/main/java/com/cloudera/impala/planner/
11. BackEnd (Be)
Backend is written on C++, and used mostly for
performance critical parts. Specifically:
- Execution of the plan fragments on nodes
- Services implementation
ImpalaD service
StateStore
Catalog Service
12. Services - ImpalaD
This is “main” service of impala which runs on
each node. It logically consists of the following
sub-services of our interest.
ImpalaService – service, used to execute query.
Console, JDBC/ODBC connects here.
ImpalaInternalService – service is used to
coordinate work within the impala cluster.
Example of usage – to coordinate the job of
running query fragments on planned impala
nodes.
What is interesting for us? Each node can serve
13. Dual role of ImpalaD service
Query coordinator
Fragment executor
17. Services - StateStore
In many clusters we have to solve “cluster
synchronization” problem on some or other way.
In impala it is solved by StateStore –
published/subscriber service, similar to
Zookeeper. Why Zookeeper is not used?
It speaks with its clients in terms of topics. Clients
can subscribe to different topics. So to find
“endpoints” - look in the sources for the usage of
“StatestoreSubscriber”
18. StateStore – main topics
IMPALA_MEMBERSHIP_TOPIC – updates about
attached and detached nodes.
IMPALA_CATALOG_TOPIC – updates about
metadata changes.
IMPALA_REQUEST_QUEUE_TOPIC – updates
in the queue of waiting queries.
19. Admission control
There is module called AdmissionController.
Via topic impala-request-queue it is know about
queries currently running and their basic
statistics like memory and CPU consumption.
Based on this info it can decide to:
-run query
-queue query
-reject query
20. Catalog Service
It caches in Java code metadata from hive
metastore:
/fe/src/main/java/com/cloudera/impala/catalog/
It is important since Hive's native partition pruning
is slow especially with large number of
partitions.
It use C++ code be/src/catalog/
To relay changes (delta's) to other nodes via
StateStore.
21. Differance with hive
Catalog Service store in memory and operate on
metadata, leaving MetaStore for persistance
only.
Technically it mean that disconnection from
MetaStore is not that complicated.
22. ImpalaInternalService - details
This is place where the real heavy lifting takes
place.
Before diving in, what we want to understand
here:
Threading model
File System interface
Predicate pushdown
Resource management
23. Threading model
DiskIoMgr schedules access of all readers to all
disks. It should include predicates.
It can give optimal concurrency. Sounds coherent
to the Intel TBB / Java Executor service
approach: give me small tasks and I will
schedule them.
The rest of operations – like Joins, Group By looks
like single threaded in current version.
IMHO – sort joins and group by are better for
concurrency.
24. File System interface
Impala is working via LibHDFS – so HDFS (not
DFS) is hard coded.
Impala required and checked that short circuit is
enabled.
During planning phase names of the block files to
be scanned are determined.
25. Main “database” algorithm
It is interesting to see, how main operations are
implemented, what options do we have:
Group By,
Order By (Sort),
Join
26. Join
Join is probably most powerful and performance
critical part of any analytical RDBMS.
Impala implements BroadCastJoin and
GraceHashJoin.(be/src/exec/partitioned-hash-join-
node.h). Both are kinds of Hash Join.
Basic idea of GraceHashJoin is to partition data,
and load in memory corresponding partitions of
the tables for the join.
27. DiskMemory
Part 2 Part 3 Part 4Part 1 Part 5
Part 2 Part 3 Part 4Part 1 Part 5
Part 2 Part 3 Part 4Part 1 Part 5Part 3 Part 4 Part 5
In-memory hash join
DiskMemory
Part 3 Part 4
Part 3 Part 4 Part 5
Part 5
28. BroadCast join
Just send small table to all nodes and join with big
one.
It is very similar to Map Side join in Hive.
Selection of join algorithm can be hinted.
29. Group by
There are two main approaches – using dictionary
or sorting.
Aggregation can be subject to memory problems
with too many groups.
Impala is using Partitioned Hash join which can
spill to disk using BufferedBlockManager.
It is somewhat analogous to join implementation.
30. User defined functions
Impala supports two kinds of UDF / UDAF
- Native, written in C/C++
- Hive's UDF written in java.
31. Caching
Impala does not cache data by itself.
It delegates it to the new HDFS caching capability.
In a nutshell – HDFS is capable to keep given
directory in memory.
Zero copy access via MMAP is implemented.
Why it is better then buffer cache?
Less task switching
No CRC Check
32. Spill to Disk
In order to be reliable, especially in face of Data
Skews, some sort of spilling data to disk is
needed.
Impala approach this problem with introduction of
BufferedBlockMgr
It implements mechanism somewhat similar to
virtual memory – pin, unpin blocks, persist them.
It can use many disks to distribute load.
It is used in all places where memory can be not
sufficient
33. Why not Virtual Memory?
Some databases offload all buffer management to
the OS Virtual Memory. Most popular example:
MongoDB.
Impala create BufferedBlockManager per
PlanFragment.
It gives control how much memory consumed by
single query on given node.
We can summarize answer as : better resource
management.
35. Memory Management
Impala BE has its own MemPool class for memory
allocation.
It is used across the board by runtime primitives
and plan nodes.
36. Why own Runtime?
Impala has implemented own runtime – memory
management, virtual memory?
IMHO Existing runtime (both Posix, and C++
runtime) are not multi-tenant. It is hard to track
and limit resource usage by different requests in
the same process.
To solve this problem Impala has its own runtime
with tracking and limiting capabilities.
37. YARN integration
When Impala run as part of the Hadoop stack
resource sharing is important question...
Two main options are
- Just divide resources between Impala and Yarn
using cgroups.
- Use YARN for the resource management.
38. Yarn Impala Impedance
YARN is built to schedule batch processing.
Impala is aimed to sub-second queries.
Running application master per query does not
sounds “low latency”.
Requesting resources “as execution go” does not
suit pipeline execution of query fragments.
40. LLAMA
Low Latency Application Master
Or
Long Living Application Master
It enable low latency requests by living longer –
for a whole application lifetime.
41. How LLAMA works
1. There is single LLAMA daemon to broker
resources between Impala and YARN
2. Impala ask for all resources at once - “gang
scheduling”
3. LLAMA cache resources before return them to
YARN.
42. Important point
Impala is capable of:
- Run real time queries In YARN environment
- Ask for more resources (especially memory)
when needed.
Main drawbacks:
Impala implements own resource management among concurrent
queries, thus partially duplicating YARN functionality.
Possible deadlocks between two YARN applications.
44. What is source of similarity
With all the difference, they solve similar problem:
How to survive in Africa...
O, sorry,
How to run and coordinate number of tasks in the
cluster.
46. ImpalaToGo
While being a perfect product Impala is chained to
the hadoop stack
- HDFS
- Management
47. Why it is a the problem?
HDFS is perfect to store vast amounts of data.
HDFS is built from large inexpensive SATA drives.
For the interactive analytics we want fast storage.
We can not afford FLASH drives for whole big
data.
48. What is solution
We can create another hadoop cluster on flash
storage.
Minus – another namenode to manage, replication
will waste space.
If replication factor is one – any problems should
be manually repaired.
49. Cache Layer in place of DFS
HDFS/Hadoop cluster
ImpalaToGo cluster
Data caching (LRU)
Auto load
50. Elasticity
Having cache layer in place of distributed file
system it is much easier to resize cluster.
ImpalaToGo is used consistent hashing for its data
placement – to minimize impact on resize.
51. Who we are?
Group of like minded developers, working on
making Impala even greater.