[
https://issues.apache.org/jira/browse/HBASE-15454?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15925567#comment-15925567
]
Duo Zhang commented on HBASE-15454:
-----------------------------------
The code is in our code base but we haven't used it seriously yet. The
production needs this feature has not fully upgraded to our internal 0.98
version yet.
And I think this feature does not break anything so we can still integrate it
in later 2.x and 1.x releases.
So maybe move this issue out of the parent issue and leave it open, I will pick
it up if we have enough experience. And then the parent issue could be resolved.
Thanks.
> Archive store files older than max age
> --------------------------------------
>
> Key: HBASE-15454
> URL: https://issues.apache.org/jira/browse/HBASE-15454
> Project: HBase
> Issue Type: Sub-task
> Components: Compaction
> Affects Versions: 2.0.0, 1.3.0, 0.98.18, 1.4.0
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Fix For: 2.0.0, 1.4.0
>
> Attachments: HBASE-15454.patch, HBASE-15454-v1.patch,
> HBASE-15454-v2.patch, HBASE-15454-v3.patch, HBASE-15454-v4.patch,
> HBASE-15454-v5.patch, HBASE-15454-v6.patch, HBASE-15454-v7.patch
>
>
> In date tiered compaction, the store files older than max age are never
> touched by minor compactions. Here we introduce a 'freeze window' operation,
> which does the follow things:
> 1. Find all store files that contains cells whose timestamp are in the give
> window.
> 2. Compaction all these files and output one file for each window that these
> files covered.
> After the compaction, we will have only one in the give window, and all cells
> whose timestamp are in the give window are in the only file. And if you do
> not write new cells with an older timestamp in this window, the file will
> never be changed. This makes it easier to do erasure coding on the freezed
> file to reduce redundence. And also, it makes it possible to check
> consistency between master and peer cluster incrementally.
> And why use the word 'freeze'?
> Because there is already an 'HFileArchiver' class. I want to use a different
> word to prevent confusing.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
