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https://issues.apache.org/jira/browse/HBASE-27474?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17651080#comment-17651080
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Hudson commented on HBASE-27474:
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Results for branch branch-2
[build #709 on
builds.a.o|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2/709/]:
(/) *{color:green}+1 overall{color}*
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details (if available):
(/) {color:green}+1 general checks{color}
-- For more information [see general
report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2/709/General_20Nightly_20Build_20Report/]
(/) {color:green}+1 jdk8 hadoop2 checks{color}
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report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2/709/JDK8_20Nightly_20Build_20Report_20_28Hadoop2_29/]
(/) {color:green}+1 jdk8 hadoop3 checks{color}
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report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2/709/JDK8_20Nightly_20Build_20Report_20_28Hadoop3_29/]
(/) {color:green}+1 jdk11 hadoop3 checks{color}
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(/) {color:green}+1 source release artifact{color}
-- See build output for details.
(/) {color:green}+1 client integration test{color}
> Evict blocks on split/merge; Avoid caching reference/hlinks if compaction is
> enabled
> ------------------------------------------------------------------------------------
>
> Key: HBASE-27474
> URL: https://issues.apache.org/jira/browse/HBASE-27474
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 3.0.0-alpha-3
> Reporter: Wellington Chevreuil
> Assignee: Wellington Chevreuil
> Priority: Major
> Fix For: 2.6.0, 3.0.0-alpha-4
>
>
> This change aims to improve block cache usage upon splits/merges. On a
> split/merge event the following main steps happen:
> 1) parent regions are closed; 2) daughters are created and opened with
> refs/hlinks; 3) Compaction is triggered soon after the daughters get online;
> With "hbase.rs.evictblocksonclose" set to false, we keep all blocks for the
> closed regions in 1, then will try to load same blocks again on 2 (since we
> are using the refs/links for the cache key), just to throw it away and cache
> the compaction resulting file in 3.
> If the block cache is close to its capacity, blocks from the compacted files
> in 3 will likely miss the cache.
> The proposal here is to always evict blocks for parent regions on a
> split/merge event, and also avoid caching blocks for refs/hlinks if
> compactions are enabled.
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