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https://issues.apache.org/jira/browse/HIVE-2600?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13175538#comment-13175538
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Phabricator commented on HIVE-2600:
-----------------------------------
heyongqiang has commented on the revision "HIVE-2600 [jira] Enable/Add
type-specific compression for rcfile".
INLINE COMMENTS
ql/src/java/org/apache/hadoop/hive/ql/io/RCFile.java:1019 can u remove this,
or try not to use Log.isInfoEnable()?
in other places, we have seen this method call is using a lot of cpu.
REVISION DETAIL
https://reviews.facebook.net/D1005
> Enable/Add type-specific compression for rcfile
> -----------------------------------------------
>
> Key: HIVE-2600
> URL: https://issues.apache.org/jira/browse/HIVE-2600
> Project: Hive
> Issue Type: Sub-task
> Components: Query Processor, Serializers/Deserializers
> Reporter: Krishna Kumar
> Assignee: Krishna Kumar
> Priority: Minor
> Attachments: HIVE-2600.D1005.1.patch, HIVE-2600.D1005.2.patch,
> HIVE-2600.v0.patch, HIVE-2600.v1.patch
>
>
> Enable schema-aware compression codecs which can perform type-specific
> compression on a per-column basis. I see this as in three-parts
> 1. Add interfaces for the rcfile to communicate column information to the
> codec
> 2. Add an "uber compressor" which can perform column-specific compression on
> a per-block basis. Initially, this can be config driven, but we can go for a
> dynamic implementation later.
> 3. A bunch of type-specific compressors
> This jira is for the first part of the effort.
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