* [linux-lvm] snapshot with 2.6.5 kernel @ 2004-05-03 6:42 Karen Shaeffer 2004-05-11 11:13 ` Heinz Mauelshagen 0 siblings, 1 reply; 3+ messages in thread From: Karen Shaeffer @ 2004-05-03 6:42 UTC (permalink / raw) To: linux-lvm Hello, I am running a patched 2.6.5 kernel and using lvm2. Everything looks ok, but the snapshot may be having problems. Else I just may be ignorant about how to use the snapshot. Here is what I am doing on a generic X86 server. I create a logical volume group out of a number of PEs that are properly configured. Then I create a logical volume. Then I start to dump a very large tar file into the logical volume. As this tar file is inflating the files into the logical volume, I then simultaneously create a snapshot volume of the recently created logical volume. The very large tar archive that was in the process of inflating its contents continues for a while, but finally just crashes and hangs at some point. Am I missunderstanding how to use snapshot here? Or is this just severly broken software? Any advise is appreciated. Thanks, Karen -- Karen Shaeffer Neuralscape, Palo Alto, Ca. 94306 shaeffer@neuralscape.com http://www.neuralscape.com ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [linux-lvm] snapshot with 2.6.5 kernel 2004-05-03 6:42 [linux-lvm] snapshot with 2.6.5 kernel Karen Shaeffer @ 2004-05-11 11:13 ` Heinz Mauelshagen 2004-05-16 21:45 ` Karen Shaeffer 0 siblings, 1 reply; 3+ messages in thread From: Heinz Mauelshagen @ 2004-05-11 11:13 UTC (permalink / raw) To: LVM general discussion and development On Sun, May 02, 2004 at 11:42:05PM -0700, Karen Shaeffer wrote: > > Hello, > > I am running a patched 2.6.5 kernel and using lvm2. Everything > looks ok, but the snapshot may be having problems. Else I just > may be ignorant about how to use the snapshot. > > Here is what I am doing on a generic X86 server. I create a logical > volume group out of a number of PEs that are properly configured. Then I > create a logical volume. Then I start to dump a very large tar file > into the logical volume. As this tar file is inflating the files into > the logical volume, I then simultaneously create a snapshot volume of > the recently created logical volume. The very large tar archive that > was in the process of inflating its contents continues for a while, > but finally just crashes and hangs at some point. > > Am I missunderstanding how to use snapshot here? Or is this just > severly broken software? Any advise is appreciated. You should be able to create a snapshot fine in ythat situation, even though the creation will happen slow under load. Can you repeat the case ? Do you have an oops ? If so, please provide the ksymoops output for further analysis of the problem. > > Thanks, > Karen > -- > Karen Shaeffer > Neuralscape, Palo Alto, Ca. 94306 > shaeffer@neuralscape.com http://www.neuralscape.com > _______________________________________________ > linux-lvm mailing list > linux-lvm@redhat.com > https://www.redhat.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ -- Regards, Heinz -- The LVM Guy -- *** Software bugs are stupid. Nevertheless it needs not so stupid people to solve them *** =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Heinz Mauelshagen Red Hat GmbH Consulting Development Engineer Am Sonnenhang 11 56242 Marienrachdorf Germany Mauelshagen@RedHat.com +49 2626 141200 FAX 924446 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [linux-lvm] snapshot with 2.6.5 kernel 2004-05-11 11:13 ` Heinz Mauelshagen @ 2004-05-16 21:45 ` Karen Shaeffer 0 siblings, 0 replies; 3+ messages in thread From: Karen Shaeffer @ 2004-05-16 21:45 UTC (permalink / raw) To: mauelshagen, LVM general discussion and development On Tue, May 11, 2004 at 01:13:22PM +0200, Heinz Mauelshagen wrote: > On Sun, May 02, 2004 at 11:42:05PM -0700, Karen Shaeffer wrote: > > > > was in the process of inflating its contents continues for a while, > > but finally just crashes and hangs at some point. > > > > Am I missunderstanding how to use snapshot here? Or is this just > > severly broken software? Any advise is appreciated. > > > You should be able to create a snapshot fine in ythat situation, even though > the creation will happen slow under load. > > Can you repeat the case ? > Do you have an oops ? If so, please provide the ksymoops output > for further analysis of the problem. Hello Heinz, Sorry for the delay in responding, but I am very busy. Yes, the problem is repeatable. The hardware included an external RAID array that was accessed with the LSI fibre channel HBA, which I believe is known to be buggy. So, I have removed this hardware from my test lab and will be conducting additional testing. I will provide full details, if I encounter additional problems. BTW, can you please advise me of the time frame for progress with LVM2 and the 2.6.x kernel. Is a patchset planned to support the 2.6.6 kernel with respect to snapshot? Also, can you comment on the evms alternative. It seems they already have a release supporting the 2.6.6 kernel. My understanding is that this latest evms release is production ready. Can you discuss LVM2's status in comparison? Thanks, Karen -- Karen Shaeffer Neuralscape, Palo Alto, Ca. 94306 shaeffer@neuralscape.com http://www.neuralscape.com ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2004-05-16 21:45 UTC | newest] Thread overview: 3+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2004-05-03 6:42 [linux-lvm] snapshot with 2.6.5 kernel Karen Shaeffer 2004-05-11 11:13 ` Heinz Mauelshagen 2004-05-16 21:45 ` Karen Shaeffer
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