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https://issues.apache.org/jira/browse/HBASE-22114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17061081#comment-17061081
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Michael Stack commented on HBASE-22114:
---------------------------------------
I pushed the below change on this branch:
{code}
commit 24bb5c349d17975e0b598b101b53ee6640f57859 (HEAD,
origin/HBASE-22114-branch-1)
Author: stack <[email protected]>
Date: Tue Mar 17 10:48:00 2020 -0700
HBASE-22114 See comment on end; Make the nightly run once a week on this
branch
diff --git a/dev-support/Jenkinsfile b/dev-support/Jenkinsfile
index ee5f9c1ec2..29498933b0 100644
--- a/dev-support/Jenkinsfile
+++ b/dev-support/Jenkinsfile
@@ -21,7 +21,7 @@ pipeline {
}
}
triggers {
- cron('@daily')
+ cron('@weekly')
}
options {
buildDiscarder(logRotator(numToKeepStr: '15'))
{code}
> Port HBASE-15560 (TinyLFU-based BlockCache) to branch-1
> -------------------------------------------------------
>
> Key: HBASE-22114
> URL: https://issues.apache.org/jira/browse/HBASE-22114
> Project: HBase
> Issue Type: Sub-task
> Reporter: Andrew Kyle Purtell
> Assignee: Andrew Kyle Purtell
> Priority: Major
> Fix For: 1.7.0
>
> Attachments: HBASE-22114-branch-1.patch, HBASE-22114-branch-1.patch,
> HBASE-22114-branch-1.patch
>
>
> HBASE-15560 introduces the TinyLFU cache policy for the blockcache.
> W-TinyLFU ([research paper|http://arxiv.org/pdf/1512.00727.pdf]) records the
> frequency in a counting sketch, ages periodically by halving the counters,
> and orders entries by SLRU. An entry is discarded by comparing the frequency
> of the new arrival (candidate) to the SLRU's victim, and keeping the one with
> the highest frequency. This allows the operations to be performed in O(1)
> time and, though the use of a compact sketch, a much larger history is
> retained beyond the current working set. In a variety of real world traces
> the policy had [near optimal hit
> rates|https://github.com/ben-manes/caffeine/wiki/Efficiency].
> The implementation of HBASE-15560 uses several Java 8 idioms, depends on JRE
> 8+ type Optional, and has dependencies on libraries compiled with Java 8+
> bytecode. It could be backported to branch-1 but must be made optional both
> at compile time and runtime, enabled by the 'build-with-jdk8' build profile.
> The TinyLFU policy must go into its own build module.
> The blockcache must be modified to load L1 implementation/policy dynamically
> at startup by reflection if the policy is "TinyLFU"
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