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Bump to v2.1.7 #1484

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Mar 28, 2019
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Bump to v2.1.7 #1484

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15 changes: 9 additions & 6 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
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# PD Change Log

## v2.1.7
- Fix the issue that the transferring leader step cannot be created in the balance-region when the number of replicas is one [#1462](https://github.com/pingcap/pd/pull/1462)

## v2.1.5
- Provide the `ExcludeTombstoneStores` option in the `GetAllStores` interface to remove the Tombstone store from the returned result [#1444](https://github.com/pingcap/pd/pull/1444)

Expand All @@ -10,14 +13,14 @@
- Fix the Region information update issue about Region merge [#1377](https://github.com/pingcap/pd/pull/1377)

## v2.1.1
- Fix the issue that some configuration items cannot be set to `0` in the configuration file [#1334](https://github.com/pingcap/pd/pull/1334)
- Fix the issue that some configuration items cannot be set to `0` in the configuration file [#1334](https://github.com/pingcap/pd/pull/1334)
- Check the undefined configuration when starting PD [#1362](https://github.com/pingcap/pd/pull/1362)
- Avoid transferring the leader to a newly created peer, to optimize the possible delay [#1339](https://github.com/pingcap/pd/pull/1339)
- Fix the issue that `RaftCluster` cannot stop caused by deadlock [#1370](https://github.com/pingcap/pd/pull/1370)
- Fix the issue that `RaftCluster` cannot stop caused by deadlock [#1370](https://github.com/pingcap/pd/pull/1370)

## v2.1.0
+ Optimize availability
- Introduce the version control mechanism and support rolling update of the cluster compatibly
- Introduce the version control mechanism and support rolling update of the cluster compatibly
- [Enable `Raft PreVote`](https://github.com/pingcap/pd/blob/5c7b18cf3af91098f07cf46df0b59fbf8c7c5462/conf/config.toml#L22) among PD nodes to avoid leader reelection when network recovers after network isolation
- Enable `raft learner` by default to lower the risk of unavailable data caused by machine failure during scheduling
- TSO allocation is no longer affected by the system clock going backwards
Expand All @@ -32,7 +35,7 @@
- [Add more commands to control the scheduling policy](https://pingcap.com/docs/tools/pd-control/#config-show--set-option-value)
- Improve [PD simulator](https://github.com/pingcap/pd/tree/release-2.1/tools/pd-simulator) to simulate the scheduling scenarios

+ API and operation tools
+ API and operation tools
- Add the [`GetPrevRegion` interface](https://github.com/pingcap/kvproto/blob/8e3f33ac49297d7c93b61a955531191084a2f685/proto/pdpb.proto#L40) to support the `TiDB reverse scan` feature
- Add the [`BatchSplitRegion` interface](https://github.com/pingcap/kvproto/blob/8e3f33ac49297d7c93b61a955531191084a2f685/proto/pdpb.proto#L54) to speed up TiKV Region splitting
- Add the [`GCSafePoint` interface](https://github.com/pingcap/kvproto/blob/8e3f33ac49297d7c93b61a955531191084a2f685/proto/pdpb.proto#L64-L66) to support distributed GC in TiDB
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* Enable Raft PreVote between PD nodes to avoid leader reelection when network recovers after network isolation
* Optimize the issue that Balance Scheduler schedules small Regions frequently
* Optimize the hotspot scheduler to improve its adaptability in traffic statistics information jitters
* Skip the Regions with a large number of rows when scheduling `region merge`
* Skip the Regions with a large number of rows when scheduling `region merge`
* Enable `raft learner` by default to lower the risk of unavailable data caused by machine failure during scheduling
* Remove `max-replica` from `pd-recover`
* Add `Filter` metrics
Expand All @@ -131,7 +134,7 @@
* Fix the issue that TiKV disk space is used up caused by replica migration in some scenarios
### Compatibility notes
* Do not support rolling back to v2.0.x or earlier due to update of the new version storage engine
* Enable `raft learner` by default in the new version of PD. If the cluster is upgraded from 1.x to 2.1, the machine should be stopped before upgrade or a rolling update should be first applied to TiKV and then PD
* Enable `raft learner` by default in the new version of PD. If the cluster is upgraded from 1.x to 2.1, the machine should be stopped before upgrade or a rolling update should be first applied to TiKV and then PD

## v2.0.4
### Improvement
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