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tikv v2.0.0 Release Notes

Release Date: 2018-04-27 // almost 6 years ago

  • 🔋 Features

    • 🚑 Protect critical configuration from incorrect modification
    • 👌 Support Region Merge [experimental]
    • ➕ Add the Raw DeleteRange API
    • ➕ Add the GetMetric API
    • ➕ Add Raw Batch Put, Raw Batch Get, Raw Batch Delete and Raw Batch Scan
    • ➕ Add Column Family options for the RawKV API and support executing operation on a specific Column Family
    • 👌 Support Streaming and Streaming Aggregation in Coprocessor
    • 👌 Support configuring the request timeout of Coprocessor
    • Carry timestamps with Region heartbeats
    • 👌 Support modifying some RocksDB parameters online, such as block-cache-size
    • 👌 Support configuring the behavior of Coprocessor when it encounters some warnings or errors
    • 👌 Support starting in the importing data mode to reduce write amplification during the data importing process
    • 👌 Support manually splitting Region in halves
    • 👌 Improve the data recovery tool tikv-ctl
    • Return more statistics in Coprocessor to guide the behavior of TiDB
    • 👌 Support the ImportSST API to import SST files [experimental]
    • ➕ Add the TiKV Importer binary to integrate with TiDB Lightning to import data quickly [experimental] ### 🐎 Performance
    • Optimize read performance using ReadPool and increase the raw_get/get/batch_get by 30%
    • 👌 Improve metrics performance
    • Inform PD immediately once the Raft snapshot process is completed to speed up balancing
    • 🐎 Solve performance jitter caused by RocksDB flushing
    • ⚡️ Optimize the space reclaiming mechanism after deleting data
    • Speed up garbage cleaning while starting the server
    • ⬇️ Reduce the I/O overhead during replica migration using DeleteFilesInRanges ### Stability
    • 🛠 Fix the issue that gRPC call does not returned when the PD leader switches
    • 🛠 Fix the issue that it is slow to offline nodes caused by snapshots
    • Limit the temporary space usage consumed by migrating replicas
    • Report the Regions that cannot elect a leader for a long time
    • ⚡️ Update the Region size information in time according to compaction events
    • 🔒 Limit the size of scan lock to avoid request timeout
    • Limit the memory usage when receiving snapshots to avoid OOM
    • 👷 Increase the speed of CI test
    • 🛠 Fix the OOM issue caused by too many snapshots
    • 🔧 Configure keepalive of gRPC
    • 🛠 Fix the OOM issue caused by an increase of the Region number