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pd-server v3.0.0
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@BusyJay BusyJay released this 28 Jun 11:34
· 57 commits to release-3.0 since this release
v3.0.0
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BusyJay Jay
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Learn about vigilant mode.
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Learn about vigilant mode.
  • Support re-creating a cluster from a single node
  • Migrate Region metadata from etcd to the go-leveldb storage engine to solve the storage bottleneck in etcd for large-scale clusters
  • API
    • Add the remove-tombstone API to clear Tombstone stores
    • Add the ScanRegions API to batch query Region information
    • Add the GetOperator API to query running operators
    • Optimize the performance of the GetStores API
  • Configurations
    • Optimize configuration check logic to avoid configuration item errors
    • Add enable-one-way-merge to control the direction of Region merge
    • Add hot-region-schedule-limit to control the scheduling rate for hot Regions
    • Add hot-region-cache-hits-threshold to identify hotspot when hitting multiple thresholds consecutively
    • Add the store-balance-rate configuration item to control the maximum numbers of balance Region operators allowed per minute
  • Scheduler Optimizations
    • Add the store limit mechanism for separately controlling the speed of operators for each store
    • Support the waitingOperator queue to optimize the resource race among different schedulers
    • Support scheduling rate limit to actively send scheduling operations to TiKV. This improves the scheduling rate by limiting the number of concurrent scheduling tasks on a single node.
    • Optimize the Region Scatter scheduling to be not restrained by the limit mechanism
    • Add the shuffle-hot-region scheduler to facilitate TiKV stability test in scenarios of poor hotspot scheduling
  • Simulator
    • Add simulator for data import scenarios
    • Support setting different heartbeats intervals for the Store
  • Others
    • Upgrade etcd to solve the issues of inconsistent log output formats, Leader selection failure in prevote, and lease deadlocking.
    • Develop a unified log format specification with restructured log system to facilitate collection and analysis by tools
    • Add monitoring metrics including scheduling parameters, cluster label information, time consumed by PD to process TSO requests, Store ID and address information, etc.
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