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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12934) Utilize Flash storage for flushing
Date Wed, 28 Jan 2015 02:32:35 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14294611#comment-14294611
] 

Andrew Purtell commented on HBASE-12934:
----------------------------------------

I didn't misread the patch. :-) I don't think we want to put all of the data for the whole
CF on one tier, we should be deciding based on access statistics whether to migrate HFiles
from one tier to the other, not just assuming a flush or freshly compacted file will benefit.
Any given file could end up just being cold data. I would agree that a coarse grain "policy"
of flushing and compacting every file of a CF would be a first step, and it might be useful
if a user can judge it properly for their use case, but this would be another thing the user
has to specify correctly in the schema without possibility of autotuning/dynamic decision
making.

> Utilize Flash storage for flushing
> ----------------------------------
>
>                 Key: HBASE-12934
>                 URL: https://issues.apache.org/jira/browse/HBASE-12934
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>         Attachments: 12934-001.txt
>
>
> Store flushing should be able to make use of hdfs storage policy.
> One option is to allow setting storage policy for the directory path of the specified
column family.



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