Oracle 21c: New Features and Enhancements of Data Pump & TTS
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At the end of the year 2020, Oracle released 21c on its Cloud infrastructure. The on-premises version will follow later this year. As with every new Oracle version, the Data Pump utility gets new features or enhancements for existing features. This presentation gives an overview of the enhancements of Data Pump and Transportable Tablespaces. The following list is an excerpt of the points I will talk about - Simultaneous use of EXCLUDE and INCLUDE - Parallelized import of metadata during a TTS import operation - Checksum support for dump files - Direct access to Oracle Cloud Object Store for exports and imports
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Oracle 21c: New Features and Enhancements of Data Pump & TTS
- 1. www.christian-gohmann.de @CHGohmannDE Oracle 21c New Features and Enhancements of Data Pump & TTS Christian Gohmann AIOUG Webinar Series 21. April 2021
- 2. Christian Gohmann • Principal Consultant at Trivadis Germany GmbH, Düsseldorf • Instructor since 2014 • O-AI (Oracle Architecture and Internals) • O-AI-DBA (Oracle Architecture and Internals for DBAs) • Tool Owner of TVD-Backup • Experiences with Oracle since 2006 (8i – 21c) • Architecture, Installation & Configuration • High Availability Solutions (RAC, Data Guard, GoldenGate) • Migration Projects • Backup & Recovery (RMAN, Data Pump) • Cloud (Amazon, Oracle) • Oracle ACE Associate @CHGohmannDE www.christian-gohmann.de
- 4. Agenda 1. Introduction 2. Data Pump 3. Transportable Tablespaces (TTS)
- 5. Introduction
- 6. Oracle 21c • Available since 8th of December 2020 as Cloud-first release • Autonomous Database Service (including Always Free Tier (not in all regions)) • Database Service • Virtual Machine (RAC, Single Instance) • Bare Metal (Single Instance) • Innovation release with Premier Support until 30. June 2023 (no Extended Support) • See MOS note Release Schedule of Current Database Releases (Doc ID 742060.1) • Oracle 21c Live Labs Workshops • Link: https://apexapps.oracle.com/pls/apex/f?p=133:100:109140367598541::::SEARCH:21c • No fix release date for the on-premises version • Linux and Windows releases are planned for the 1st half-year 2021 • Other platforms will be released later Use your 30-days Oracle Cloud free trial to get hands on experiences with Oracle 21c (RAC).
- 7. Always-free Autonomous Database 1/2 • Oracle 21c is available in the regions Ashburn (IAD), Phoenix (PHX), Frankfurt (FRA) and London (LHR) • Can only be created in the home region of the user • Navigate to Oracle Database > Autonomous Databases • Direct link: https://cloud.oracle.com/db/adb • Current workload types supported for always-free
- 9. Data Pump
- 10. Simultanenous use of EXCLUDE and INCLUDE • Before 21c, the parameters EXCLUDE and INCLUDE were mutually exclusive • This restriction is lifted with 21c • When both parameters are used, the INCLUDE parameter is evaluated first UDE-00011: parameter include is incompatible with parameter exclude $> vi expdp_tables.par ... SCHEMAS=HR,SH INCLUDE=TABLE EXCLUDE=TABLE:"IN ('COSTS', 'SALES')" $> vi impdp_tables.par ... SCHEMAS=HR INCLUDE=TABLE EXCLUDE=TABLE:"IN ('JOB_HISTORY')" EXCLUDE=INDEX,STATISTICS
- 11. Checksum Support 1/3 • Oracle 21c supports the generation of checksums for the dump files using CHECKSUM parameter • Can be used to confirm validity after transfer (to/from object storage, on-premises copy) • Data Pump writes control information into the header block of each dump file • Extended by checksums for the remaining blocks • Use CHECKSUM_ALGORITHM to choose checksum algorithm • CRC32 • SHA256 (default) • SHA384 • SHA512 Generating checksums for dump file set No new item codes in DBMS_DATAPUMP.GET_DUMPFILE_INFO for the checksum support.
- 12. Checksum Support 2/3 • Verify a dump file using impdp and VERIFY_ONLY parameter • ORA-39411 is raised when an invalid checksum is detected $> impdp ... VERIFY_ONLY=YES … Verifying dump file checksums Master table "SYSTEM"."SYS_IMPORT_SCHEMA_01" successfully loaded/unloaded dump file set is complete verified checksum for dump file "/backup/dumps/expdp_hr_sh.dmp" dump file set is consistent Job "SYSTEM"."SYS_IMPORT_SCHEMA_01" successfully completed at Sun Apr 18 16:20:58 2021 elapsed 0 00:00:03 ORA-39001: invalid argument value ORA-39000: bad dump file specification ORA-39411: header checksum error in dump file "/backup/dumps/expdp_hr_sh.dmp"
- 13. Checksum Support 3/3 • Use parameter VERIFY_CHECKSUM during import to validate the dump files as first step • If turned off, a warning is written to the screen/log $> impdp ... VERIFY_CHECKSUM=YES … Verifying dump file checksums Master table "SYSTEM"."SYS_IMPORT_FULL_01" successfully loaded/unloaded Starting "SYSTEM"."SYS_IMPORT_FULL_01": system/********@C21SFE1PDB1 parfile=impdp_21c_demo_checksum.par Processing object type TABLE_EXPORT/TABLE/TABLE Warning: dump file checksum verification is disabled No warning/error is raised, when the dump file does not include checksums.
- 14. Object Storage Integration 1/4 • Data Pump can access the Object Store during export and import operations • Parameter DUMPFILE now supports a Uniform Resource Identifier (URI) • Credential for the target bucket is provided by the parameter CREDENTIAL • Use the PL/SQL package DBMS_CLOUD to create the required credential • MOS note How To Setup And Use DBMS_CLOUD Package (Doc ID 2748362.1) • Currently only working in Autonomous Database (even with 19c) Only the CDB architecture is supported by DBMS_CLOUD. DBMS_CLOUD is pre-installed, configured and maintained in Oracle Autonomous Database Manual installation steps The following steps are required to manually install and enable DBMS_CLOUD for Oracle Database 19c beginning with 19.9 and higher. Currently, Oracle Database 21c is not supported. DUMPFILE=https://objectstorage.<Region>.oraclecloud.com/n/<Namespace>/b/<Bucket>/o/mydump_%u.dmp
- 15. Object Storage Integration 2/4 • Create credential and test access to the target bucket SQL> BEGIN DBMS_CLOUD.CREATE_CREDENTIAL( credential_name => 'CLOUD_ACCESS', username => 'christian.gohmann@trivadis.com', password => '[Au_L8F0DRb_}lXmcM-G' ); END; / SQL> SELECT COUNT(*) AS "OBJECT_COUNT" FROM DBMS_CLOUD.LIST_OBJECTS('CLOUD_ACCESS','https://objectstorage.eu- frankfurt-1.oraclecloud.com/n/kwq12gukapmy/b/datapump-dumps/o/'); OBJECT_COUNT ------------ 1 Error ORA-20404 is raised, when the URI is invalid or the user is not authorized to access the bucket. Auth token
- 16. Object Storage Integration 3/4 • Perform export/import using command-line tools $> vi expdp.par USERID=system/manager DIRECTORY=DATA_PUMP_DIR DUMPFILE=https://objectstorage.eu-frankfurt-1.oraclecloud.com/n/cre01gulanmy/b/datapump- dumps/o/test_%U.dmp CREDENTIAL=CLOUD_ACCESS SCHEMAS=SCOTT $> expdp parfile=expdp.par … Master table "ADMIN"."SYS_EXPORT_SCHEMA_01" successfully loaded/unloaded ****************************************************************************** Dump file set for ADMIN.SYS_EXPORT_SCHEMA_01 is: https://swiftobjectstorage.eu-frankfurt-1.oraclecloud.com/v1/cre01gulanmy/datapump- dumps/test_01.dmp Job "ADMIN"."SYS_EXPORT_SCHEMA_01" successfully completed at Wed Apr 7 19:14:01 2021 elapsed 0 00:02:10 Parameter DATA_PUMP_DIR is still required for the log file.
- 17. Object Storage Integration 4/4 • Data Pump splits the dump file(s) into 10 MiB chunks to increase the upload speed • Use a Swift compatible tool like curl to download the dump file • Parameter FILESIZE is supported, but each of the dump files is still split into chunks of 10 MiB $> curl -O -X GET -u 'christian.gohmann@trivadis.com:[Au_L8F0DRb_}lXmcM-G' https://swiftobjectstorage.eu-frankfurt-1.oraclecloud.com/v1/cre01gulanmy/datapump- dumps/test_01.dmp Auth token
- 18. TRANSFORM Parameter Enhancements • New transformation INDEX_COMPRESSION_CLAUSE for Data Pump Import • Allows the control of adding, changing or removing index key compression • All indexes of the Data Pump are affected • Supported values: • NONE (Tablespace default will be used) • COMPRESS n (Prefix Compression) • COMPRESS ADVANCED LOW (Advanced Index Compression, ACO required) • COMPRESS ADVANCED HIGH (Advanced Index Compression, ACO required) $> impdp ... TRANSFORM = INDEX_COMPRESSION_CLAUSE:"<Clause>" The transformation TABLE_COMPRESSION_CLAUSE exists since Oracle 12c Release 1 to do the same on table level.
- 19. Miscellaneous • Support for the native JSON data type • Tables with JSON data types are automatically excluded when VERSION is set to <= 19 • No warning or error is recorded in the log file • Query to check if tables with JSON data type columns exist SQL*Loader was also enhanced in 21c to support the native JSON data type for conventional and direct path loads. SQL> CREATE TABLE json_data ( ID NUMBER, DATA JSON ); SQL> SELECT DISTINCT owner, table_name FROM dba_tab_cols WHERE data_type = 'JSON'; OWNER TABLE_NAME ---------- -------------------- HR JSON_DATA
- 21. Parallelize Metadata Operations 1/2 • Before 21c, only one Data Pump worker was supported • In 21c, all defined Data Pump workers (PARALLEL parameter) are exporting/importing metadata • Each worker processes one type of metadata at the same time ORA-39002: invalid operation ORA-39047: Jobs of type TRANSPORTABLE cannot use multiple execution streams. 20-APR-21 08:28:27.212: W-1 Startup on instance 1 took 1 seconds 20-APR-21 08:28:29.079: W-2 Startup on instance 1 took 1 seconds ... 20-APR-21 08:29:02.686: W-1 Processing object type TRANSPORTABLE_EXPORT/TABLE 20-APR-21 08:29:04.601: W-2 Processing object type TRANSPORTABLE_EXPORT/CONSTRAINT/CONSTRAINT 20-APR-21 08:29:04.671: W-2 Completed 50 CONSTRAINT objects in 0 seconds 20-APR-21 08:29:11.621: W-2 Processing object type TRANSPORTABLE_EXPORT/POST_INSTANCE/PROCACT_INSTANCE 20-APR-21 08:29:11.650: W-2 Completed 15 PROCACT_INSTANCE objects in 0 seconds 20-APR-21 08:29:12.304: W-2 Processing object type TRANSPORTABLE_EXPORT/POST_INSTANCE/PROCDEPOBJ 20-APR-21 08:29:12.334: W-2 Completed 10 PROCDEPOBJ objects in 0 seconds 20-APR-21 08:29:47.203: W-1 Completed 57 TABLE objects in 0 seconds
- 22. Parallelize Metadata Operations 2/2 • Before 21c, only one Data Pump worker was supported • In 21c, all defined Data Pump workers (PARALLEL parameter) are exporting/importing metadata • Each worker processes one type of metadata at the same time ORA-39002: invalid operation ORA-39047: Jobs of type TRANSPORTABLE cannot use multiple execution streams. 20-APR-21 08:28:27.212: W-1 Startup on instance 1 took 1 seconds 20-APR-21 08:28:29.079: W-2 Startup on instance 1 took 1 seconds ... 20-APR-21 08:29:02.686: W-1 Processing object type TRANSPORTABLE_EXPORT/TABLE 20-APR-21 08:29:04.601: W-2 Processing object type TRANSPORTABLE_EXPORT/CONSTRAINT/CONSTRAINT 20-APR-21 08:29:04.671: W-2 Completed 50 CONSTRAINT objects in 0 seconds 20-APR-21 08:29:11.621: W-2 Processing object type TRANSPORTABLE_EXPORT/POST_INSTANCE/PROCACT_INSTANCE 20-APR-21 08:29:11.650: W-2 Completed 15 PROCACT_INSTANCE objects in 0 seconds 20-APR-21 08:29:12.304: W-2 Processing object type TRANSPORTABLE_EXPORT/POST_INSTANCE/PROCDEPOBJ 20-APR-21 08:29:12.334: W-2 Completed 10 PROCDEPOBJ objects in 0 seconds 20-APR-21 08:29:47.203: W-1 Completed 57 TABLE objects in 0 seconds
- 23. Resume Jobs • Starting with 21c, a failed Transportable Tablespace job can be restarted near the point of the failure
- 24. Further Information Oracle Database 21c – What’s new https://docs.oracle.com/en/database/oracle/oracle-database/21/whats-new.html Oracle Database 21c – Utilities https://docs.oracle.com/en/database/oracle/oracle-database/21/sutil/index.html My Oracle Support https://support.oracle.com
- 25. Questions and answers.. Christian Gohmann Principal Consultant Tel. +49-211-58 6664 702 christian.gohmann@trivadis.com @CGohmannDE