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https://issues.apache.org/jira/browse/BIGTOP-552?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael updated BIGTOP-552:
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Attachment: BIGTOP-552.patch
This patch :
* explicitly enable durable sync in hbase-site.xml
* enable durable sync in HDFS if variable $hdfs_support_append is set to "true"
* enable [shortcut reader
feature|https://issues.apache.org/jira/browse/HDFS-2246] for HBase if variable
$hdfs_shortcut_reader_user is et to "hbase"
> Enable HDFS durable sync
> ------------------------
>
> Key: BIGTOP-552
> URL: https://issues.apache.org/jira/browse/BIGTOP-552
> Project: Bigtop
> Issue Type: Bug
> Components: Deployment
> Affects Versions: 0.3.0
> Reporter: Michael
> Fix For: 0.4.0
>
> Attachments: BIGTOP-552.patch
>
>
> According to the HBase book () :
> {quote}
> HBase will lose data unless it is running on an HDFS that has a durable sync
> implementation. Hadoop 0.20.2, Hadoop 0.20.203.0, and Hadoop 0.20.204.0 DO
> NOT have this attribute. Currently only Hadoop versions 0.20.205.x or any
> release in excess of this version -- this includes hadoop 1.0.0 -- have a
> working, durable sync [6]. Sync has to be explicitly enabled by setting
> dfs.support.append equal to true on both the client side -- in hbase-site.xml
> -- and on the serverside in hdfs-site.xml (The sync facility HBase needs is a
> subset of the append code path).
> {quote}
> [http://hbase.apache.org/book.html#hadoop]
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