[Linux-HA] NFS question - RH ES 3.0

[Espen Ekeroth]

Will drdb solve the problem?

And why does it - it is still not the same file system. As I remeber it 
drdb is working on the block level - will this be the answer?


/Espen

Phone: +47 69215581 / + 47 92499076
email: espen.ekeroth at omxgroup.com
MSN: espene at halden.net




Alan Robertson <alanr at unix.sh>
Sent by: linux-ha-bounces at lists.linux-ha.org
15.09.2005 17:39
Please respond to General Linux-HA mailing list
 
        To:     General Linux-HA mailing list 
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        Subject:        Re: [Linux-HA] NFS question - RH ES 3.0


Espen Ekeroth wrote:
> 
> We have an application that is running on one the the nodes in the 
> cluster. The application is creating files on the local file system. A 
> third node han nfs mounted this filesystem using the logical IP. When 
> the application is moved to the other node the nfs client gets "stale".
> 
> The exported area is exported using the normal export from the OS - not 
> as a part of the cluster.
> 
> Is is a way around this without having common storage?
> 
> It is not important for our applications that a file may be lost since 
> it is written to the wrong phisical disk (no need to sync the disks on 
> the cluster)


NFS requires that the two nodes have (logically) the same storage - 
block for block.  Having the same files with the same names, 
permissions, etc. is NOT enough.

Consider using DRBD if you can't use shared storage.  See 
http://linux-ha.org/DRBD and some of the articles on using DRBD and 
Linux-HA at http://linux-ha.org/PressRoom



-- 
     Alan Robertson <alanr at unix.sh>

"Openness is the foundation and preservative of friendship...  Let me 
claim from you at all times your undisguised opinions." - William 
Wilberforce
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