Re: SLES 9 SP4 and OCFS2

1) It is not expected.
2) It really indicates a serious problem in your setting. Problem can be in 
access to the shared disks, or in
the wrong system id in OCFSv2, or anything else, but it clearly indicates a 
serious problem. Don't use such file system.
3) You better recreate OCVSf2 from the scratch, then check the status and 
check if all systems see each another.
Don't use OCFSv2 if you can't see changes on all nodes instantly.

I saw such behavior a few times, all because of the configuration issues. 
The most amazing one was, when I (mistakenly) created a few iSCSI initiators 
with the same ID, so that iSCSI target (SAN storage server) connected with 
the one at a time.

There are a few OCFSv2 tools which can be used (I don't remember exact 
name - one which shows all mounted nodes and node id's is the most usefull). 
OCFSv2 have a mailing lists on oracle server, you can use these lists for 
these questions.

----- Original Message ----- 
From: "Werner Flamme" <[email protected]>
To: "suse-oracle" <[email protected]>
Sent: Monday, January 14, 2008 8:55 AM
Subject: [suse-oracle] SLES 9 SP4 and OCFS2


Hi everyone,

I read Arun's cool guide "Creating shared storage on SLES 10 using Xen
and OCFS2". This was a good inspiration for me ;-)

I have 3 machines running SLES 9 SP 4. Two of them are connected to a FC
RAID (Sun 3510), the 3rd will be connected soon. Since the machines are
running SAP, I want to use OCFS2 for the common directory /usr/sap/trans.

I used Arun's guide and proceeded like he wrote from point 6 on (I don't
have Xen). Everything went well, the config was propagated, 2 machines
can mount the same filesystem in rw mode without scrambling it.

But: when I create a file, eg. /usr/sap/trans/mytest, this file is not
shown on the other machine. Both nodes show active heartbeat. Is this
expected behaviour? (not for me, though ;-))

After unmount und remountig the fs again, the file is shown.

Upgrading to SLES 10 SP 1 is not an option yet. What else do I have to
do, that a file created on one node is accessible on another without
having to unmount and mount again? BTW, mount -o remount does not work.

Regards,
Werner

-- 
Werner Flamme, Abt. WKDV
Helmholtz-Zentrum für Umweltforschung GmbH - UFZ
Permoserstr. 15 - 04318 Leipzig
Tel.: (0341) 235-1921 - Fax (0341) 235-451921
http://www.ufz.de - eMail: [email protected]

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