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From "Brandon Li (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7976) Update NFS user guide for mount option "sync" to minimize or avoid reordered writes
Date Mon, 23 Mar 2015 21:51:52 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7976?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Brandon Li updated HDFS-7976:
-----------------------------
    Description: The mount option "sync" is critical. I observed that this mount option can
minimize or avoid reordered writes. Mount option "sync" could have some negative performance
impact on the file uploading. However, it makes the performance much more predicable and can
also reduce the possibility of failures caused by file dumping.  (was: The mount option "sync"
is critical. I observed that this mount option can minimize or avoid reordered writes. Mount
option "sync" could have some negative performance impact on the file uploading. However,
it makes the performance much more predicable and can also reduce the possibly of failures
caused by file dumping.)

> Update NFS user guide for mount option "sync" to minimize or avoid reordered writes
> -----------------------------------------------------------------------------------
>
>                 Key: HDFS-7976
>                 URL: https://issues.apache.org/jira/browse/HDFS-7976
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: documentation, nfs
>    Affects Versions: 2.2.0
>            Reporter: Brandon Li
>            Assignee: Brandon Li
>
> The mount option "sync" is critical. I observed that this mount option can minimize or
avoid reordered writes. Mount option "sync" could have some negative performance impact on
the file uploading. However, it makes the performance much more predicable and can also reduce
the possibility of failures caused by file dumping.



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