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Posted to issues@kylin.apache.org by "Shaofeng SHI (JIRA)" <ji...@apache.org> on 2018/09/14 01:31:00 UTC
[jira] [Updated] (KYLIN-3512) No need to enable
kylin.storage.hbase.endpoint-compress-result when the query is related to
count distinct of bitmap
[ https://issues.apache.org/jira/browse/KYLIN-3512?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Shaofeng SHI updated KYLIN-3512:
--------------------------------
Fix Version/s: v2.6.0
> No need to enable kylin.storage.hbase.endpoint-compress-result when the query is related to count distinct of bitmap
> --------------------------------------------------------------------------------------------------------------------
>
> Key: KYLIN-3512
> URL: https://issues.apache.org/jira/browse/KYLIN-3512
> Project: Kylin
> Issue Type: Improvement
> Reporter: Zhong Yanghong
> Assignee: Zhong Yanghong
> Priority: Major
> Fix For: v2.6.0
>
>
> As we know, roaring bitmap will compress its contents. There's no need to use {{CompressionUtils.compress}} to compress again the results of each region, which is time consuming and whose compression ratio is low. One example is as follows:
> Etc message: start latency: 39@1,agg done@{color:#f79232}1094{color},cpuTime@1090,compress done@{color:#f79232}4245{color},server stats done@4246
> endpoint.CubeVisitService: Size of final result = {color:#f79232}61,157,510{color} ({color:#f79232}64,725,324{color} before compressing)
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