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*: add change log for 2.0 GA #1038

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Apr 27, 2018
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*: add change log for 2.0 GA #1038

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*: add change log for ga.
disksing Apr 26, 2018
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address comments.
disksing Apr 26, 2018
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address comments.
disksing Apr 26, 2018
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Merge branch 'master' into changlog
nolouch Apr 27, 2018
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16 changes: 13 additions & 3 deletions CHANGELOG.md
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# PD Change Log

## v2.0.0-GA
### New Features
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New Feature

* Support using pd-ctl to scatter spcified Regions for manually adjusting hotspot Regions in some cases
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spcified -> specified

### Improvements
* More configuration check rules to prevent unreasonable configuration
* Optimize scheduling strategy when TiKV node has insufficient space, try the best to prevent disk from becoming full
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Suggestion: Optimize the scheduling strategy when a TiKV node has insufficient space so as to prevent the disk from being fully occupied

* Optimize hot-region scheduler execution efficiency and add more metrics
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Optimize the execution efficiency of the hot-region scheduler and add more metrics
Does "热点调度" mean hot-region scheduler or hotspot scheduler?

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It is named hot-region scheduler in code.

* Optimize Region health check logic to avoid generating redundant schedule operators

## v2.0.0-rc.5
### New Features
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New Feature
since there is only one new feature

* Support adding the learner node
### Improves
### Improvements
* Optimize the Balance Region Scheduler to reduce scheduling overhead
* Adjust the default value of `schedule-limit` configuration
* Fix the compatibility issue when adding a new scheduler
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## v2.0.0-rc.4
### New Features
* Support splitting Region manually to handle the hot spot in a single Region
### Improves
### Improvements
* Optimize metrics
### Bug Fixes
* Fix the issue that the label property is not displayed when `pdctl` runs `config show all`

## v2.0.0-rc3
### New Features
* Support Region Merge, to merge empty Regions or small Regions after deleting data
### Improves
### Improvements
* Ignore the nodes that have a lot of pending peers during adding replicas, to improve the speed of restoring replicas or making nodes offline
* Optimize the scheduling speed of leader balance in scenarios of unbalanced resources within different labels
* Add more statistics about abnormal Regions
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