 | | | Rolling our own HA NFS NAS Servers | Rolling our own HA NFS NAS Servers 2005-06-24 - By Lon Hohberger
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On Wed, 2005-06-22 at 11:43 -0500, Montz, James C. (James Tower) wrote:
> Both NAS Heads configured for HA Clustering/Failover Using Redhat
> Cluster Suite
> Taking over the IP and NFS Exports of the failed server.
It "should" work. Cluster Suite can do NFS failover.
> Has anyone implemented a simliear solution?
> Is this configuration known to work (proper control of the External SCSI
> by active server, etc.)
> Where does the Quoram partition reside?
>
> Known issues? Comments?
The manual says that host-RAID controllers are not supported for
clustering, so I'd call Red Hat Support to ask whether or not it's
supported.
Putting the PERCs in "Cluster Mode" (a requirement) will cause
performance degradation. Basically, "Cluster Mode" is the same thing as
"uncached". Most PV220 series are JBODs (as opposed to RAID arrays with
internal controllers).
> We had originally planned on implementing 2 PowerVault 775N's with
> Cluster option, but that product has been discontinued.
An external FC or SCSI RAID array, such as a Dell/EMC Clariion is a
*far* better solution.
> Our other option is to use Microsoft Advanced Server? Clustering, but
> would prefer to keep the entire environment running Linux.
The performance loss will happen on any environment.
-- Lon
>
> James
>
>
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