2.3. Tungsten Replicator 7.1.0 GA (16 Aug 2023)

Version End of Life. Not Yet Set

Release 7.1.0 is the next major v7 release containing a number of important bug fixes and key new features.

Behavior Changes

The following changes have been made to Tungsten Replicator and may affect existing scripts and integration tools. Any scripts or environment which make use of these tools should check and update for the new configuration:

  • Command-line Tools

    • The tpm copy-keys command has been renamed to tpm copy and a new command has been created tpm cert copy with the same functionality.

      Issues: CT-2186

Improvements, new features and functionality

  • Behavior Changes

    • Additional logging will now be added to the replicator logs during switchover/failover operations to enable better debugging in the event of issues.

      Issues: CT-1448

  • Installation and Deployment

    • Running tpm uninstall will now save all of the Tungsten database tracking schemas for later use. There is also a new tpm keep command, which allows the tracking schemas to be saved to disk at any time in multiple formats (.json, .dmp and .cmd)

      Issues: CT-2131

    • Added tpm flag deploy-systemd as a more meaningful alias to install

      Issues: CT-2152

  • Command-line Tools

    • Added a new option --preserve-schema to the tpm uninstall command in order to leave the tracking schema in the database.

      Issues: CT-561

    • A new command tpm cert has been added to aid in the creation, rotation and management of certificates for all areas of Tungsten.

      Known limitations: Percona 5.6, and all versions of MariaDB do not provide the mysql_ssl_rsa_setup command required by tpm cert gen mysqlcerts.

      Issues: CT-2085

    • The tpm diag command now supports the --skipsudo and --nosudo arguments to prevent operations from using the sudo command. Using this option may result in tpm diag skipping/failing various gathers due to a lack of access.

      Issues: CT-2146

  • PostgreSQL Applier

    • It is now possible to configure the PostgreSQL applier in Batch mode.

      Issues: CT-2031

    • Added a new ddlscan template, ddl-mysql-postgres-staging.vm, to allow generation of staging table DDL for the PostgreSQL batch applier.

      Issues: CT-2136

  • S3 CSV Applier

    • A new applier is now available that replicates to csv files on S3 storage.

      For more information, see S3 Applier Docuemntation

      Issues: CT-606

  • Core Replicator

    • Upgraded JGroups library to 4.2.22

      Issues: CT-2011

  • Filters

    • A new shardbyrules filter has been added that will allow rule based sharding of replication based on user confgurable rules that would allow sharding at table level, whereas previoulsy sharding would only be handled at schema level.

      For more information, see shardbyrules Filter Docuemntation

      Issues: CT-2164

  • Monitoring

    • Prometheus exporters now provide the ssl cert expiration date as an epoch value in addition to the label.

      Issues: CT-2099

    • Prometheus libraries have been upgraded from version 0.8.1 to 0.16.0

      Issues: CT-2166

Bug Fixes

  • Installation and Deployment

    • Fixed RPM package script to run tpm install instead of tpm update when installing the rpm

      Issues: CT-2130

  • Command-line Tools

    • tpm uninstall would sometimes print "ERROR >> db1 >> undefined method '+' for nil:NilClass"

      Issues: CT-2104

    • The tpm command now searches more places to locate shell commands that are called, especially useful when $CONTINUENT_ROOT/share/env.sh is not sourced.

      Issues: CT-2182

  • Backup and Restore

    • tprovision will now print an error message and exit if the MySQL datadir does not exit.

      Issues: CT-1901

  • PostgreSQL Applier

    • Fixes an issue with the ddl-mysql-postgres.vm ddlscan template that caused varchar datatype lengths to be parsed incorrectly.

      Issues: CT-2019

    • Fixed a NullPointerException error occurring at startup when applying to PostgreSQL

      Issues: CT-2021

  • Core Replicator

    • Improved a query that is run by Tungsten when fetching tables metadata (column names, datatypes, etc). While it is not generally needed, the unoptimized query can run badly (especially) against old mysql versions with a lot of databases / tables. For now, the new optimized query is not used by default, but this could change in some future version.

      This can be enabled by using the following property :


      Issues: CT-2077

    • Fixed an issue while processing geometry data with SRID 4326 that would swap longitude and latitude. This applies only to MySQL 8, as prior MySQL versions do not allow specifying the order when applying a WKB (Well-known binary) to MySQL

      Issues: CT-2172