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From "Guanghao Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14247) Separate the old WALs into different regionserver directories
Date Fri, 29 Sep 2017 13:32:01 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16185829#comment-16185829
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Guanghao Zhang commented on HBASE-14247:
----------------------------------------

Pint [~davelatham] [~stack] [~Apache9] [~anoop.hbase] for reviewing. Thanks.

> Separate the old WALs into different regionserver directories
> -------------------------------------------------------------
>
>                 Key: HBASE-14247
>                 URL: https://issues.apache.org/jira/browse/HBASE-14247
>             Project: HBase
>          Issue Type: Improvement
>          Components: wal
>            Reporter: Liu Shaohui
>            Assignee: Guanghao Zhang
>            Priority: Critical
>             Fix For: 2.0.0
>
>         Attachments: HBASE-14247.master.001.patch, HBASE-14247.master.002.patch, HBASE-14247.master.003.patch,
HBASE-14247.master.004.patch, HBASE-14247-v001.diff, HBASE-14247-v002.diff, HBASE-14247-v003.diff
>
>
> Currently all old WALs of regionservers are achieved into the single directory of oldWALs.
In big clusters, because of long TTL of WAL or disabled replications, the number of files
under oldWALs may reach the max-directory-items limit of HDFS, which will make the hbase cluster
crashed.
> {quote}
> Caused by: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.protocol.FSLimitException$MaxDirectoryItemsExceededException):
The directory item limit of /hbase/lgprc-xiaomi/.oldlogs is exceeded: limit=1048576 items=1048576
> {quote}
> A simple solution is to separate the old WALs into different  directories according to
the server name of the WAL.
> Suggestions are welcomed~ Thanks



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