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  • Mon, Nov 7, 2016

Weekly update (October 31 ~ November 06, 2016)

Last week, we landed 42 PRs in the TiDB repositories and 29 PRs in the TiKV repositories.

New release

TiDB Beta 4

Weekly update in TiDB

Added

  • The aggregation info to the explain statement.

  • Support the show processlist syntax. TiDB supports mydumper now.

  • Support the show create database statement.

  • Support the buildin function from_unixtime.

  • Push down the aggregation operator to the position before join.

  • Get cluster ID from Placement Driver.

Fixed

  • A bug in parser that misses the recognize identifier with leading digits.

  • A bug in the load data command.

Improved

  • The performance of the DropTable statement.

  • The performance of the AddIndex statement.

  • The query metrics.

Weekly update in TiKV

Added

  • Multiversion concurrency control (MVCC) support for tikv-ctl.
  • Support -v/--version to print the version information.
  • Metrics for MVCC key versions and deleted key versions.
  • Use random cluster ID to bootstrap clusters to avoid wrong joining cluster by the users, with PR 370, 1257

Fixed

  • Panic directly if the RocksDB writes fail to fix 1262.
  • Add the start time for store monitor to fix 1207.
  • Return the ‘no leader’ error to avoid panic when calling the GetLeader API with no leader.

Improved

  • Skip values for scan.
  • Make cache code cleaner, with PR 365, 366, 367.
  • Allow liner reverse seek in the lock column family.
  • Separate compaction to a different thread worker.
  • Avoid filling block cache when scanning.
  • Include the snapshot size in the used_size store.
  • Dump the RocksDB statistics with the SIGUSR1 signal.

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