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From "Lars Hofhansl (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-3149) Make flush decisions per column family
Date Mon, 20 Feb 2012 00:16:38 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13211614#comment-13211614

Lars Hofhansl commented on HBASE-3149:

@Nicolas: Interesting bit about hstore.compaction.min.size. I'm curious, is 4MB something
that works specifically for your setup, or would you generally recommend it setting it that
It probably has to do with whether compression is enabled, how many CFs and relative sizes,

Maybe instead of defaulting it to flushsize, we could default it to flushsize/2 or flushsize/4...?

> Make flush decisions per column family
> --------------------------------------
>                 Key: HBASE-3149
>                 URL: https://issues.apache.org/jira/browse/HBASE-3149
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>            Reporter: Karthik Ranganathan
>            Assignee: Nicolas Spiegelberg
> Today, 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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