TiDB 3.1 Beta.1 Release Notes

Release date: January 10, 2020

TiDB version: 3.1.0-beta.1

TiDB Ansible version: 3.1.0-beta.1

TiKV

• backup

  • Change the name of the backup file from start_key to the hash value of start_key to reduce the file name's length for easy reading #6198
  • Disable RocksDB's force_consistency_checks check to avoid false positives in the consistency check #6249
  • Add the incremental backup feature #6286

• sst_importer

  • Fix the issue that the SST file does not have MVCC properties during restoring #6378
  • Add the monitoring items such as tikv_import_download_duration, tikv_import_download_bytes, tikv_import_ingest_duration, tikv_import_ingest_bytes, and tikv_import_error_counter to observe the overheads of downloading and ingesting SST files #6404

• raftstore

  • Fix the issue of Follower Read that the follower reads stale data when the leader changes, thus breaking transaction isolation #6343

Tools

• BR (Backup and Restore)
  • Fix the inaccurate backup progress information #127
  • Improve the performance of splitting Regions #122
  • Add the backup and restore feature for partitioned tables #137
  • Add the feature of automatically scheduling PD schedulers #123
  • Fix the issue that data is overwritten after non PKIsHandle tables are restored #139

TiDB Ansible

• Add the feature of automatically disabling Transparent Huge Pages (THP) in the operating system during the initialization phase #1086
• Add the Grafana monitoring for BR components #1093
• Optimize the deployment of TiDB Lightning by automatically creating related directories #1104