Weekly update (September 19 ~ September 25, 2016)

Last week, we landed 20 PRs in the TiDB repositories and 24 PRs in the TiKV repositories.

Notable changes to TiDB

• Support DML binlog.
• Support reading the history data.
• Add more metrics to distsql, DDL, and store.
• Replace the vendor tool with glide.
• Improve test coverage.
• Code cleanup.
• Improve the test code by splitting a big test file into smaller files.

Notable changes to TiKV

• Port the read index feature from etcd.
• Add the upper bound mod support to the iterator to improve the seek performance.
• Support the recovery mode for RocksDB.
• Support adding/removing column families dynamically.

Notable changes to Placement Driver (PD)

• Remove the watch leader mechanism for the clients becausse the PD server can proxy requests to the leader.
• Add the GetRegionByID command.