hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "stack (JIRA)" <j...@apache.org>
Subject [jira] (HBASE-17437) Support specifying a WAL directory outside of the root directory
Date Tue, 31 Jan 2017 19:35:51 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17437?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15847371#comment-15847371
] 

stack commented on HBASE-17437:
-------------------------------

bq. What needs to go in ReleaseNotes? Just a write-up of new settings and how to use it?

Yes sir. Target audience is the 'operator' or 'user' who is not interested in detail only
how to make use of this nice new feature. So, yeah, how to configure it, how to turn it on,
and a listing of anything that might 'surprise'. Can be short. Would be seed for documentation
of the feature up in refguide. Thank you.

> Support specifying a WAL directory outside of the root directory
> ----------------------------------------------------------------
>
>                 Key: HBASE-17437
>                 URL: https://issues.apache.org/jira/browse/HBASE-17437
>             Project: HBase
>          Issue Type: Improvement
>          Components: Filesystem Integration, wal
>    Affects Versions: 1.2.4
>            Reporter: Yishan Yang
>            Assignee: Zach York
>              Labels: patch
>             Fix For: 2.0.0, 1.4.0
>
>         Attachments: hbase-17437-branch-1.2.patch, HBASE-17437.master.001.patch, HBASE-17437.master.002.patch,
HBASE-17437.master.003.patch, HBASE-17437.master.004.patch, HBASE-17437.master.005.patch,
HBASE-17437.master.006.patch, HBASE-17437.master.007.patch, HBASE-17437.master.008.patch,
HBASE-17437.master.009.patch, HBASE-17437.master.010.patch, HBASE-17437.master.011.patch,
HBASE-17437.master.012.patch, hbase-17437-master.patch
>
>
> Currently, the WAL and the StoreFiles need to be on the same FileSystem. Some FileSystems
(such as Amazon S3) don’t support append or consistent writes. These two properties are
imperative for the WAL in order to avoid loss of writes. However, StoreFiles don’t necessarily
need the same consistency guarantees (since writes are cached locally and if writes fail,
they can always be replayed from the WAL).
>  
> This JIRA aims to allow users to configure a log directory (for WALs) that is outside
of the root directory or even in a different FileSystem. The default value will still put
the log directory under the root directory.



--
This message was sent by Atlassian JIRA
(v6.3.15#6346)

Mime
View raw message