[jira] [Commented] (KYLIN-3650) support for hive table partitioned on separate columns year,month and day

2018-11-03 Thread Billy Liu (JIRA) 


[ 
https://issues.apache.org/jira/browse/KYLIN-3650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16674041#comment-16674041
 ] 

Billy Liu commented on KYLIN-3650:
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[~dipesh.maurya] the patch is welcomed. Thank you for your contribution. 

> support for hive table partitioned on separate columns year,month and day
> -
>
> Key: KYLIN-3650
> URL: https://issues.apache.org/jira/browse/KYLIN-3650
> Project: Kylin
>  Issue Type: Improvement
>  Components: Metadata
>Reporter: dipesh
>Priority: Major
>
> partition support on hive table having different partition columns year , 
> month and day



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[jira] [Commented] (KYLIN-3656) Improve HLLCounter performance

2018-11-03 Thread Billy Liu (JIRA) 


[ 
https://issues.apache.org/jira/browse/KYLIN-3656?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16674040#comment-16674040
 ] 

Billy Liu commented on KYLIN-3656:
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Hi . [~baibaichen], could you share some performance improve data from your 
environment? 

> Improve HLLCounter performance
> --
>
> Key: KYLIN-3656
> URL: https://issues.apache.org/jira/browse/KYLIN-3656
> Project: Kylin
>  Issue Type: Improvement
>Affects Versions: all
>Reporter: Chang chen
>Assignee: Chang chen
>Priority: Major
> Fix For: v2.6.0
>
> Attachments: 0001-KYLIN-3656-Improve-HLLCounter-performance.patch
>
>
> The current HLLCounter implementation has some room to improve performance, 
> as we find in our product environment.
>  #  Create HLLCounter from another HLLCounter, we can copy register instead 
> of merge
>  # To compute harmonic mean in the HLLCSnapshot, we could
>  ## using table to cache all 1/2^r  without computing on the fly
>  ## remove floating addition by using integer addition in the bigger loop
>  ## remove branch, e.g. needn't checking whether registers[i] is zero or not, 
> although this is minor improvement.



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