hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Zach York (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17437) Support specifying a WAL directory outside of the root directory
Date Wed, 08 Feb 2017 18:13:41 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17437?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15858341#comment-15858341
] 

Zach York commented on HBASE-17437:
-----------------------------------

[~enis] For the first point, It looks like we might want to do this in the master patch. I
can open a JIRA for that later today.

For the second point, the only place this is currently used is getFailedServersFromLogFolders
which only pays attention to WALs. I see that this method is public instead of private, is
there a plan to use it outside of MasterFileSystem? In that case we should also create a method
for the rootdir filesystem as well. In that case, I think we should do it in a separate JIRA
to avoid noise here.



> 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-1.001.patch, HBASE-17437.branch-1.002.patch,
HBASE-17437.branch-1.003.patch, HBASE-17437.branch-1.004.patch, 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