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Weekly update (July 30 ~ August 05, 2016)

2016-08-05

Last week, we landed 28 PRs in the TiDB repositories and 32 PRs in the TiKV repositories.

TiDB

TiKV

Placement Driver

Weekly update (July 30 ~ August 05, 2016)

Last week, we landed 28 PRs in the TiDB repositories and 32 PRs in the TiKV repositories.

Notable changes to `TiDB`

Add support for constant folding in the SQL optimizer.
Optimize the query speed of the secondary index. In certain scenarios, only the data in the index needs to be read.
Use dynamic programing to decide the join path for multiple tables.
Adjust the command line to support setting the listening address.
Prometheus metrics and golang pprof share the same port.
Update the Documents repository.
Fix several bugs.

Notable changes to `TiKV`

Split the operations on RocksDB from scheduler thread to a worker pool.
Support leader lease mechanism when the quorum check is enabled.
Use pending snapshot regions check to avoid receiving multiple overlapping snapshots at the same time.
Check down peers and report to Placement Driver(PD).
Support time monitor to check whether time jumps back or not.

Notable changes to `Placement Driver`

Reduce the "1234" and "9090" ports in PD. Now PD has only "2379" and "2380" ports for external use.
Support the join flag to let PD join an existing cluster dynamically.
Support the remove PD member API to remove a PD from a cluster dynamically.
Support the list PD members API.