[
https://issues.apache.org/jira/browse/HBASE-6371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13484389#comment-13484389
]
Lars Hofhansl commented on HBASE-6371:
--------------------------------------
Maybe create a porting jira and assign to you, Sergey?
(Or turn this jira into a porting jira - by changing the title)
> [89-fb] Tier based compaction
> -----------------------------
>
> Key: HBASE-6371
> URL: https://issues.apache.org/jira/browse/HBASE-6371
> Project: HBase
> Issue Type: Improvement
> Reporter: Akashnil
> Assignee: Liyin Tang
> Labels: noob
> Attachments: HBASE-6371-089fb-commit.patch
>
>
> Currently, the compaction selection is not very flexible and is not sensitive
> to the hotness of the data. Very old data is likely to be accessed less, and
> very recent data is likely to be in the block cache. Both of these
> considerations make it inefficient to compact these files as aggressively as
> other files. In some use-cases, the access-pattern is particularly obvious
> even though there is no way to control the compaction algorithm in those
> cases.
> In the new compaction selection algorithm, we plan to divide the candidate
> files into different levels according to oldness of the data that is present
> in those files. For each level, parameters like compaction ratio, minimum
> number of store-files in each compaction may be different. Number of levels,
> time-ranges, and parameters for each level will be configurable online on a
> per-column family basis.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
