2016-12-26-tidb-weekly.md

title	date	summary	tags
Weekly update (December 19 ~ December 25, 2016)	2016-12-26	TiDB RC1 is released! Last week, we landed 34 PRs in the TiDB repositories and 14 PRs in the TiKV repositories.	TiDB TiKV

New Release

TiDB RC1 is released!

Weekly update in TiDB

Last week, we landed 34 PRs in the TiDB repositories.

Added

• Support the RPAD built-in function..

• Support the show keys from table from database statement.

Fixed

• Retry infinite times if the commit primary key times out.

• Do not push aggregation down to the memory tables.

• Fix a bug about the alter table statement.

Improved

• Refactor the time type related code: #2259, #2280, #2284, #2289, #2292

• Refactor optimizer: extract initialization related code into physical Initialization.

• Speed up the DDL statement.

• Avoid generating parser.go every time.

• Skip the constraint check for prewrite to improve the loading data speed.

• Speed up the add index statement.

New contributor

• silentred

Weekly update in TiKV

Last week, We landed 14 PRs in the TiKV repositories.

Added

• Add configuration to control the replica scheduling speed.

• Skip constraint check for prewrite to improve the loading data speed.

• Add region and store commands to pd-ctl.

• Add configuration to cache index and filter blocks in the block cache.

Fixed

• Report snapshot sending status reliably to fix #1377.

• Store short value in write cf directly to save space and improve performance.

Improved

• Remove unnecessary admin operators.

• Handle Raft ready append log in one WriteBatch to reduce the CPU usage and improve performance.

• Remove the down peer first when scheduling replicas.