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CHANGELOG.md

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DM Changelog

All notable changes to this project will be documented in this file.

[1.0-rc.1] 2019-07-01

  • Remove the restriction of "the next shard DDL statement cannot be executed unless the current shard DDL operation is completely finished in shard merge scene for binlog replication" #177
  • Support retry task on the invalid connection error for binlog replication #66
  • Support generating -schema-create.sql files automatically for full migration #186
  • Use TiDB SQL Parser to parse and restore DDL statements in binlog query events, and remove the use db statement when replicating to downstream #54
  • Support migrating tables with generated column for full migration and binlog replication #42 #60
  • Support appending the task name as a suffix to the dumped data directory (dir in the task configuration file) for full migration #100
  • Support resuming tasks automatically after the DM-worker process restarted #88 #116
  • Support skipping pre-check items when starting tasks #65
  • Support case-insensitive in binlog event type of Binlog Event Filter rules #188
  • Optimize relay log mechanism to improve compatibility with upstream MySQL/MariaDB #92 #108 #117 #140 #171
  • Optimize RPC framework to limit the concurrency between DM-master and DM-worker #157
  • Redirect the log of mydumper into the log of DM-worker #93
  • Support using --print-sample-config command flag to show the sample config of DM-worker and DM-master #28
  • Support showing the status of sharding DDL replication in the Grafana dashboard and optimize the dashboard #96 #101 #120
  • Support setting the max_allowed_packet parameter for the database connection to the upstream and downstream #99
  • Support using unsafe_cleanup in DM Ansible to clean components of DM cluster #128
  • Fix flushing checkpoint wrongly when existing multiple sharding groups #124
  • Fix the wrong progress status when loading dumped files #89
  • Greatly improve the test to ensure correctness
  • Fix many other bugs that don't affect correctness

[1.0-alpha] 2019-01-18

  • Support the full data migration and the incremental data migration from MySQL/MariaDB into TiDB
  • Support running multi independent synchronization tasks concurrently on one DM-worker instance
  • Support synchronizing a certain table of the upstream MySQL/MariaDB instance to the specified table in TiDB by table routing
  • Support only synchronizing or filtering all operations of some databases or some tables by black and white lists
  • Support synchronizing or filtering some of the binlog events by binlog event filter
  • Support modifying auto-increment primary key fields to resolve the conflicts for shard tables by column mapping
  • Support merging the original shard instances and tables into TiDB but with some restrictions
  • Support synchronizing data definition changed by online DDL tools (including pt-osc and gh-ost)
  • Support handling synchronization trouble caused by DDL which is not supported by TiDB