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https://issues.apache.org/jira/browse/HBASE-17437?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15858403#comment-15858403
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Enis Soztutar commented on HBASE-17437:
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bq. Enis Soztutar 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.
Please do, and link it here. I would like to keep the master and branch-1
patches as close as possible. History tracking gets hard otherwise. In the
branch-1 commit, we should mention that the other jiras are incorporated.
bq. 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
Seems that HBASE-15763 only went in 2.0 which changes this. We do not have to
make changes to this method in branch-1, we can just get rid of fsOk, and keep
walFsOk.
> 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.
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