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https://issues.apache.org/jira/browse/HBASE-7055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13488014#comment-13488014
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Ted Yu commented on HBASE-7055:
-------------------------------
Todd's reasoning is right.
CompactionConfiguration was created to hold compaction related parameters in
memory.
This feature allows age-based and size-based compaction. The granularity is at
column family level.
So there would be potentially many compaction parameters. e.g. take a look at
TestTierCompactSelection.
Here is an excerpt:
{code}
+ public void testAgeBasedAssignment() throws IOException {
+
+ conf.setLong(strPrefix + strSchema + "Tier.0.MaxAgeInDisk", 10L);
+ conf.setLong(strPrefix + strSchema + "Tier.1.MaxAgeInDisk", 100L);
+ conf.setLong(strPrefix + strSchema + "Tier.2.MaxAgeInDisk", 1000L);
+ conf.setLong(strPrefix + strSchema + "Tier.0.MaxSize", Long.MAX_VALUE);
+ conf.setLong(strPrefix + strSchema + "Tier.1.MaxSize", Long.MAX_VALUE);
+ conf.setLong(strPrefix + strSchema + "Tier.2.MaxSize", Long.MAX_VALUE);
{code}
There're 3 dimensions here: tier number, age or size, column family.
> port HBASE-6371 tier-based compaction from 0.89-fb to trunk
> -----------------------------------------------------------
>
> Key: HBASE-7055
> URL: https://issues.apache.org/jira/browse/HBASE-7055
> Project: HBase
> Issue Type: Task
> Components: Compaction
> Affects Versions: 0.96.0
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Fix For: 0.96.0
>
> Attachments: HBASE-6371-squashed.patch, HBASE-6371-v2-squashed.patch
>
>
> There's divergence in the code :(
> See HBASE-6371 for details.
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