Hello,
Just a small question.
I have a small cluster (16 machines). An external machine is
"exporting" a software raid-5 via the AoE protocol. The machines
of the cluster mount the network device using ocfs2. In my case
the network device is /dev/etherd/e11.1
My question is, can that external machine be also a member of
the cluster? and if so, can it use its local /dev/md0 instead of the
network device when mounting the ocfs2 filesystem?, This can be
useful for backups and/or exporting the ocfs2 filesystem outside
of the cluster.
I want to replace our user area which is now on a NFS filesystem
with that ocfs2 setup, since it definitively goes faster.
Thanks and regards
--
Jaime D. Perea Duarte. <jaime at iaa dot es>
Linux registered user #10472
Dep. Astrofisica Extragalactica.
Instituto de Astrofisica de Andalucia (CSIC)
Apdo. 3004, 18080 Granada, Spain.
On Wed, May 23, 2007 at 09:37:04AM +0200, Jaime Perea wrote:> I have a small cluster (16 machines). An external machine is > "exporting" a software raid-5 via the AoE protocol. The machines > of the cluster mount the network device using ocfs2. In my case > the network device is /dev/etherd/e11.1 > > My question is, can that external machine be also a member of > the cluster? and if so, can it use its local /dev/md0 instead of the > network device when mounting the ocfs2 filesystem?, This can be > useful for backups and/or exporting the ocfs2 filesystem outside > of the cluster.How are you exporting the storage? vblade? I know that won't work with the iscsi target due to the block device and the iscsi device having different caches. I suspect the same goes for any in-kernel aoe target. It _might_ work with aoe if you're using a userspace target that does direct io against the same md device though... I'd test it pretty heavily 1st though (create files, on both nodes, put data in them, make sure there's 100% coherence between nodes). In any case, if you must mount on the target, I'd only do it long enough to make your backups - you don't want the node exporting all your storage to fence :) By the way, there's some slides available at http://oss.oracle.com/projects/ocfs2/dist/documentation/cheap_clustering.pdf regarding aoe/iscsi/ocfs2 that you might find useful. --Mark -- Mark Fasheh Senior Software Developer, Oracle mark.fasheh@oracle.com
1) You better use iSCSI for this export - it is proven to work with OCFSv2. 2) AoE can work but should be tested carefully. 3) It depends (can third server be the member or not); answer is negative for iSCSI so expect problems for AoE too. ----- Original Message ----- From: "Jaime Perea" <jaime.perea@gmail.com> To: <ocfs2-users@oss.oracle.com> Sent: Wednesday, May 23, 2007 12:37 AM Subject: [Ocfs2-users] AoE ocfs2 local raid question> Hello, > > Just a small question. > > I have a small cluster (16 machines). An external machine is > "exporting" a software raid-5 via the AoE protocol. The machines > of the cluster mount the network device using ocfs2. In my case > the network device is /dev/etherd/e11.1 > > My question is, can that external machine be also a member of > the cluster? and if so, can it use its local /dev/md0 instead of the > network device when mounting the ocfs2 filesystem?, This can be > useful for backups and/or exporting the ocfs2 filesystem outside > of the cluster. > > I want to replace our user area which is now on a NFS filesystem > with that ocfs2 setup, since it definitively goes faster. > > Thanks and regards > > -- > > Jaime D. Perea Duarte. <jaime at iaa dot es> > Linux registered user #10472 > > Dep. Astrofisica Extragalactica. > Instituto de Astrofisica de Andalucia (CSIC) > Apdo. 3004, 18080 Granada, Spain. > > _______________________________________________ > Ocfs2-users mailing list > Ocfs2-users@oss.oracle.com > http://oss.oracle.com/mailman/listinfo/ocfs2-users >
Installed Oracle Enterprise Linux R4 Update 4
Kernel is: 2.6.9-42.0.0.0.1.ELsmp
What version of ocfs2 will load in it? I tried installing
ocfs2-2.6.9-42.ELsmp-1.2.5-1.i686.rpm ...but the error says
Failed dependencies:
kernel-smp = 2.6.9-42.EL is needed by
ocfs2-2.6.9-42.ELsmp-1.2.5-1.i686
Thx
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OCFS2 for EL4 is shipped alongwith the iso. If registered, you can use up2date, as listed on oss.oracle.com/projects/ocfs2 to get the package too. Kendall, Kim wrote:> Installed Oracle Enterprise Linux R4 Update 4 > Kernel is: 2.6.9-42.0.0.0.1.ELsmp > > What version of ocfs2 will load in it? I tried installing > ocfs2-2.6.9-42.ELsmp-1.2.5-1.i686.rpm ...but the error says > > Failed dependencies: > kernel-smp = 2.6.9-42.EL is needed by > ocfs2-2.6.9-42.ELsmp-1.2.5-1.i686 > > Thx > > The information contained in this E-mail may be confidential and/or proprietary to Inter-Tel and/or its affiliates. The information transmitted herewith is intended only for use by the individual or entity to which it is addressed. If the reader of this message is not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying or other use of, or taking of any action in reliance upon this information is strictly prohibited. If you have received this communication in error, please contact the sender and delete the material from your computer. > > _______________________________________________ > Ocfs2-users mailing list > Ocfs2-users@oss.oracle.com > http://oss.oracle.com/mailman/listinfo/ocfs2-users >