commit | 755d78c03e7e08f5b6763f9b206b7ebf3ca2daf2 | [log] [tgz] |
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author | haomarch <marchpure@126.com> | Mon Jun 22 05:21:27 2020 +0800 |
committer | liuzhi <371684521@qq.com> | Wed Jun 24 16:09:01 2020 +0800 |
tree | 42e26516e991aa5dc4350073938bd621aa3767e7 | |
parent | fae47a39316d8340f16d93010ee7a744ce87f2c9 [diff] |
[CARBONDATA-3862] Insert stage performance optimazation Why is this PR needed? There are two major performance bottlenecks of 'insert stage'. 1) Get LastModifyTime of stagefiles requires a lot of access to OBS. 2) Parallelism is not supported What changes were proposed in this PR? 1) Cache the lastmodifytime info when list stage files. 2) support insert stage in parallel. we add a tag 'loading' to the stages in process. different insertstage processes can load different data separately by choose the stages without 'loading' tag or stages loaded timeout. which avoid loading the same data between concurrent insertstage processes. The 'loading' tag is actually an empty file with '.loading' suffix filename. Does this PR introduce any user interface change? NO Is any new testcase added? YES This closes #3799
Apache CarbonData is an indexed columnar data store solution for fast analytics on big data platform, e.g.Apache Hadoop, Apache Spark, etc.
You can find the latest CarbonData document and learn more at: http://carbondata.apache.org
CarbonData file format is a columnar store in HDFS, it has many features that a modern columnar format has, such as splittable, compression schema ,complex data type etc, and CarbonData has following unique features:
CarbonData is built using Apache Maven, to build CarbonData
Some features are marked as experimental because the syntax/implementation might change in the future.
This is an active open source project for everyone, and we are always open to people who want to use this system or contribute to it. This guide document introduce how to contribute to CarbonData.
To get involved in CarbonData:
Apache CarbonData is an open source project of The Apache Software Foundation (ASF).