>>> Muhammad Sharfuddin <M.Sharfuddin@nds.com.pk> schrieb am 07.07.2015 um 11:15 in
Nachricht <559B98A2.5060401@nds.com.pk>:
[...]
> I don't understand the advantage of Ocfs2 file system in such a setup.
The advantage depends on the alternatives: If two nodes both want to access the same filesystem, you can use OCFS2, NFS, or CIFS (list not complete). If only one node can access a filesystem, you could try any journaled filesystem (a fsck is needed after a node crash).
If you use NFS or CIFS, you shift the problem to another machine.
If you use a local filesystem, you need recovery, mount, and start of your application on a standby node.
With OCFS2 you'll have to wait for a few seconds before your application can continue.
Note that a usual SCSI disk with read-errors can also delay I/O significantly while retrying I/O.
Regards,
Ulrich
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Nachricht <559B98A2.5060401@nds.com.pk>:
[...]
> I don't understand the advantage of Ocfs2 file system in such a setup.
The advantage depends on the alternatives: If two nodes both want to access the same filesystem, you can use OCFS2, NFS, or CIFS (list not complete). If only one node can access a filesystem, you could try any journaled filesystem (a fsck is needed after a node crash).
If you use NFS or CIFS, you shift the problem to another machine.
If you use a local filesystem, you need recovery, mount, and start of your application on a standby node.
With OCFS2 you'll have to wait for a few seconds before your application can continue.
Note that a usual SCSI disk with read-errors can also delay I/O significantly while retrying I/O.
Regards,
Ulrich
_______________________________________________
Linux-HA mailing list is closing down.
Please subscribe to users@clusterlabs.org instead.
http://clusterlabs.org/mailman/listinfo/users
_______________________________________________
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