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From "Pierre-Luc Dion (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CLOUDSTACK-6166) Should we be recommending ASYNC NFS in documentation?
Date Sat, 07 Mar 2015 23:23:38 GMT

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-6166?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14351834#comment-14351834
] 

Pierre-Luc Dion commented on CLOUDSTACK-6166:
---------------------------------------------

There is a not about the async flag, at the end of this page: http://cloudstack-installation.readthedocs.org/en/latest/storage_setup.html

sync is usually not performant which probably explain the reason for this configuration.

> Should we be recommending ASYNC NFS in documentation?
> -----------------------------------------------------
>
>                 Key: CLOUDSTACK-6166
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-6166
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: Doc
>            Reporter: John Kinsella
>            Priority: Minor
>
> Looking at current and past installation, we recommend users export secondary storage
with async NFS:
> /export  *(rw,async,no_root_squash,no_subtree_check)
> Generally async mode is considered risky from a data reliability point of view (eg http://serverfault.com/questions/328931/how-dangerous-is-nfs-async-when-raid-bbu-and-ups-are-present
).
> While advanced users will see this and ignore it, we probably shouldn't be guiding new
ACS users towards async NFS...



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