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https://issues.apache.org/jira/browse/HBASE-10201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14198411#comment-14198411
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Jean-Marc Spaggiari commented on HBASE-10201:
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Do you have the metrics with the last version of the patch?
>From a previous version it was:
With per CF flush:
metric_storeCount: 3,
metric_storeFileCount: 7,
metric_memStoreSize: 110195648,
metric_storeFileSize: 4369570622,
metric_compactionsCompletedCount: 27,
metric_numBytesCompactedCount: 10353718691,
metric_numFilesCompactedCount: 89,
Write amplification: 2.37
Does it changed?
> Port 'Make flush decisions per column family' to trunk
> ------------------------------------------------------
>
> Key: HBASE-10201
> URL: https://issues.apache.org/jira/browse/HBASE-10201
> Project: HBase
> Issue Type: Improvement
> Components: wal
> Reporter: Ted Yu
> Assignee: zhangduo
> Priority: Critical
> Fix For: 2.0.0, 0.99.2
>
> Attachments: 3149-trunk-v1.txt, HBASE-10201-0.98.patch,
> HBASE-10201-0.98_1.patch, HBASE-10201-0.98_2.patch, HBASE-10201-0.99.patch,
> HBASE-10201.patch, HBASE-10201_1.patch, HBASE-10201_2.patch,
> HBASE-10201_3.patch, HBASE-10201_4.patch, HBASE-10201_5.patch
>
>
> Currently the flush decision is made using the aggregate size of all column
> families. When large and small column families co-exist, this causes many
> small flushes of the smaller CF. We need to make per-CF flush decisions.
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