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WeMeet url: https://meeting.tencent.com/s/xoV6xnkBw5oT
Host: Yuyuan Kang
Status Updates
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1. Announce
Apache IoTDB 0.11.13 to release
2. Bug Fixes
- ISSUE-2505 ignore PathNotExistException in recover and change recover error to warn
- IOTDB-1119 Fix C++ SessionDataSet bug when reading value buffer
- Fix SessionPool does not recycle session and can not offer new Session due to RunTimeException
- ISSUE-2588 Fix dead lock between deleting data and querying in parallel
- ISSUE-2546 Fix first chunkmetadata should be consumed first
- IOTDB-1126 Fix unseq tsfile is deleted due to compaction
- IOTDB-1137 MNode.getLeafCount error when existing sub-device
- ISSUE-2624 ISSUE-2625 Avoid OOM if user don't close Statement and Session manually
- ISSUE-2639 Fix possible NPE during end query process
- Alter IT for An error is reported and the system is suspended occasionally
- IOTDB-1149 print error for -e param when set maxPRC<=0
- IOTDB-2648 Last query not right when having multiple devices
- Delete mods files after compaction
- ISSUE-2687 fix insert NaN bug
- ISSUE-2598 Throw explicit exception when time series is unknown in where clause
- Fix timeseriesMetadata cache is not cleared after the TsFile is deleted by a compaction
- ISSUE-2611 An unsequence file that covers too many sequence file causes OOM query
- IOTDB-1135 Fix count timeseries bug when the paths are nested
- ISSUE-2709 IOTDB-1178 Fix cache is not cleared after compaction
- ISSUE-2746 Fix data overlapped bug after the elimination unseq compaction process
- Fix getObject method in JDBC should return an Object
- IOTDB-1188 Fix IoTDB 0.11 unable to delete data bug
- Fix when covering a tsfile resource with HistoricalVersion = null, it鈥檒l throw a NPE
- fix the elimination unseq compaction may loss data bug after a delete operation is executed
3. New Features
- Add explain sql support
4. Improvements
- IOTDB-1140 optimize regular data encoding
- Add more log for better tracing
- Add backgroup exec for cli -e function
- Add max direct memory size parameter to env.sh
5. Closed development
1) Meta data:
- Implement device template (a group of measurements)
- Eliminate redundant definition of the leaf node
2) Data in Memory:
- New data structure for multiple columns sharing a same timestamp
- Eliminate redundant timestamp
- Reduce memory consumption
3) Data on disk:
- Designed new TsFile format
- Support data of multiple columns sharing a same timestamp
- Reduce disk consumption
4) Result:
One of the scenarios:
Write efficiency (row/sec) | |
Single-state, old strategy | 190,624 |
Single-state, new strategy | 487,656 |
Distributed, 3 nodes 1 replica, new strategy | 1,095,331 |
6. Open Floor
new ideas, feedback, suggestions.
1) [Discussion] Monthly Contributor Award
February‘s “Contributors of The Month”
- sunjincheng121(Jincheng Sun), with 132571 lines changed and 8 mails sent;
- HTHou(Haonan Hou), with 2116 lines changed and 4 mails sent;
- neuyilan(Houliang Qi), with 2692 lines changed and 3 mails sent.
There are also 22 other contributors who contributed to IoTDB this month.
7 New contributors submitted their first PR in IoTDB
- wuzhaojie(Zhaojie Wu),
- WilliamSong11(Yuxiang Song),
- GLBB,
- THUMarkLau(Xuxin Liu),
- chenjun40,
- 543202718(Haoyu Wang)
- jxlgzwh(Wenhao Zhong).
2) [Proposal] Hackthon (April)
Mar 7st, 2021, Sunday.
Time:
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https://shimo.im/docs/dt8C9cQtKHGgkH89
Status Updates
Announce
Apache IoTDB 0.11.2 released (01-23)
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