* [linux-lvm] Volume Groups and Clusters @ 2006-02-21 21:22 Joshua ChaitinPollak 2006-02-22 8:49 ` Heinz Mauelshagen 0 siblings, 1 reply; 7+ messages in thread From: Joshua ChaitinPollak @ 2006-02-21 21:22 UTC (permalink / raw) To: linux-lvm Hello, I found this mention of sharing Volume Groups across Clusters on the LVM howto: http://www.tldp.org/HOWTO/LVM-HOWTO/sharinglvm1.html Am I right in assuming that this means you can have a single volume group active on multiple nodes in a cluster, provided that you doing mount the same logical volume on more than one node at a time? Thanks, Josh -- Joshua ChaitinPollak Software Engineer Kiva Systems ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [linux-lvm] Volume Groups and Clusters 2006-02-21 21:22 [linux-lvm] Volume Groups and Clusters Joshua ChaitinPollak @ 2006-02-22 8:49 ` Heinz Mauelshagen 2006-02-22 12:52 ` Joshua ChaitinPollak 0 siblings, 1 reply; 7+ messages in thread From: Heinz Mauelshagen @ 2006-02-22 8:49 UTC (permalink / raw) To: LVM general discussion and development On Tue, Feb 21, 2006 at 04:22:10PM -0500, Joshua ChaitinPollak wrote: > Hello, I found this mention of sharing Volume Groups across Clusters > on the LVM howto: > > http://www.tldp.org/HOWTO/LVM-HOWTO/sharinglvm1.html > > Am I right in assuming that this means you can have a single volume > group active on multiple nodes in a cluster, provided that you doing > mount the same logical volume on more than one node at a time? Yes, you assume right *but* you need a cluster filesystem (eg, GFS) as well to be able to mount shared logical volumes on multiple nodes at once or you mess up the data. > > Thanks, > > Josh > > -- > Joshua ChaitinPollak > Software Engineer > Kiva Systems > > > _______________________________________________ > 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 Cluster and Storage Development 56242 Marienrachdorf Germany Mauelshagen@RedHat.com +49 2626 141200 FAX 924446 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [linux-lvm] Volume Groups and Clusters 2006-02-22 8:49 ` Heinz Mauelshagen @ 2006-02-22 12:52 ` Joshua ChaitinPollak 2006-02-22 13:12 ` Patrick Caulfield 0 siblings, 1 reply; 7+ messages in thread From: Joshua ChaitinPollak @ 2006-02-22 12:52 UTC (permalink / raw) To: LVM general discussion and development On Feb 22, 2006, at 3:49 AM, Heinz Mauelshagen wrote: > On Tue, Feb 21, 2006 at 04:22:10PM -0500, Joshua ChaitinPollak wrote: >> Hello, I found this mention of sharing Volume Groups across Clusters >> on the LVM howto: >> >> http://www.tldp.org/HOWTO/LVM-HOWTO/sharinglvm1.html >> >> Am I right in assuming that this means you can have a single volume >> group active on multiple nodes in a cluster, provided that you doing >> mount the same logical volume on more than one node at a time? > > Yes, you assume right *but* you need a cluster filesystem (eg, GFS) > as well to be able to mount shared logical volumes on multiple nodes > at once or you mess up the data. Right, but I don't need GFS if I'm only going to mount the file system on one machine at a time, right? -- Joshua ChaitinPollak Software Engineer Kiva Systems ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [linux-lvm] Volume Groups and Clusters 2006-02-22 12:52 ` Joshua ChaitinPollak @ 2006-02-22 13:12 ` Patrick Caulfield 2006-02-22 13:27 ` Joshua ChaitinPollak 0 siblings, 1 reply; 7+ messages in thread From: Patrick Caulfield @ 2006-02-22 13:12 UTC (permalink / raw) To: LVM general discussion and development Joshua ChaitinPollak wrote: > > On Feb 22, 2006, at 3:49 AM, Heinz Mauelshagen wrote: > >> On Tue, Feb 21, 2006 at 04:22:10PM -0500, Joshua ChaitinPollak wrote: >>> Hello, I found this mention of sharing Volume Groups across Clusters >>> on the LVM howto: >>> >>> http://www.tldp.org/HOWTO/LVM-HOWTO/sharinglvm1.html >>> >>> Am I right in assuming that this means you can have a single volume >>> group active on multiple nodes in a cluster, provided that you doing >>> mount the same logical volume on more than one node at a time? >> >> Yes, you assume right *but* you need a cluster filesystem (eg, GFS) >> as well to be able to mount shared logical volumes on multiple nodes >> at once or you mess up the data. > > Right, but I don't need GFS if I'm only going to mount the file system > on one machine at a time, right? No, just a lot of care and discipline :) -- patrick ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [linux-lvm] Volume Groups and Clusters 2006-02-22 13:12 ` Patrick Caulfield @ 2006-02-22 13:27 ` Joshua ChaitinPollak 2006-02-24 19:22 ` Jeff Hardy 0 siblings, 1 reply; 7+ messages in thread From: Joshua ChaitinPollak @ 2006-02-22 13:27 UTC (permalink / raw) To: LVM general discussion and development On Feb 22, 2006, at 8:12 AM, Patrick Caulfield wrote: > Joshua ChaitinPollak wrote: >> >> On Feb 22, 2006, at 3:49 AM, Heinz Mauelshagen wrote: >> >>> On Tue, Feb 21, 2006 at 04:22:10PM -0500, Joshua ChaitinPollak >>> wrote: >>>> Hello, I found this mention of sharing Volume Groups across >>>> Clusters >>>> on the LVM howto: >>>> >>>> http://www.tldp.org/HOWTO/LVM-HOWTO/sharinglvm1.html >>>> >>>> Am I right in assuming that this means you can have a single volume >>>> group active on multiple nodes in a cluster, provided that you >>>> doing >>>> mount the same logical volume on more than one node at a time? >>> >>> Yes, you assume right *but* you need a cluster filesystem (eg, GFS) >>> as well to be able to mount shared logical volumes on multiple nodes >>> at once or you mess up the data. >> >> Right, but I don't need GFS if I'm only going to mount the file >> system >> on one machine at a time, right? > > No, just a lot of care and discipline :) Great! And, my co-workers keep telling me, "You lack discipline!" -- Joshua ChaitinPollak Software Engineer Kiva Systems ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [linux-lvm] Volume Groups and Clusters 2006-02-22 13:27 ` Joshua ChaitinPollak @ 2006-02-24 19:22 ` Jeff Hardy 2006-02-26 13:42 ` Heinz Mauelshagen 0 siblings, 1 reply; 7+ messages in thread From: Jeff Hardy @ 2006-02-24 19:22 UTC (permalink / raw) To: LVM general discussion and development I played around with this kind of setup for awhile, and found that there was no need to vgchange -an on the "Other nodes" when I was making changes on the "Admin node." I was also able to make volume changes on two Admin nodes at the same time. I figured I was probably just extremely lucky to win some extremely dangerous race conditions, so I wouldn't do it in production. I assume the cluster extensions to LVM (CLVM) are what allow multiple Admin actions on multiple Admin nodes? Anyway, just some friendly advice: follow the docs :) On Wed, 2006-02-22 at 08:27 -0500, Joshua ChaitinPollak wrote: > On Feb 22, 2006, at 8:12 AM, Patrick Caulfield wrote: > > > Joshua ChaitinPollak wrote: > >> > >> On Feb 22, 2006, at 3:49 AM, Heinz Mauelshagen wrote: > >> > >>> On Tue, Feb 21, 2006 at 04:22:10PM -0500, Joshua ChaitinPollak > >>> wrote: > >>>> Hello, I found this mention of sharing Volume Groups across > >>>> Clusters > >>>> on the LVM howto: > >>>> > >>>> http://www.tldp.org/HOWTO/LVM-HOWTO/sharinglvm1.html > >>>> > >>>> Am I right in assuming that this means you can have a single volume > >>>> group active on multiple nodes in a cluster, provided that you > >>>> doing > >>>> mount the same logical volume on more than one node at a time? > >>> > >>> Yes, you assume right *but* you need a cluster filesystem (eg, GFS) > >>> as well to be able to mount shared logical volumes on multiple nodes > >>> at once or you mess up the data. > >> > >> Right, but I don't need GFS if I'm only going to mount the file > >> system > >> on one machine at a time, right? > > > > No, just a lot of care and discipline :) > > Great! And, my co-workers keep telling me, "You lack discipline!" > ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [linux-lvm] Volume Groups and Clusters 2006-02-24 19:22 ` Jeff Hardy @ 2006-02-26 13:42 ` Heinz Mauelshagen 0 siblings, 0 replies; 7+ messages in thread From: Heinz Mauelshagen @ 2006-02-26 13:42 UTC (permalink / raw) To: LVM general discussion and development On Fri, Feb 24, 2006 at 02:22:08PM -0500, Jeff Hardy wrote: > I played around with this kind of setup for awhile, and found that there > was no need to vgchange -an on the "Other nodes" when I was making > changes on the "Admin node." I was also able to make volume changes on > two Admin nodes at the same time. I figured I was probably just > extremely lucky to win some extremely dangerous race conditions, so I > wouldn't do it in production. I assume the cluster extensions to LVM > (CLVM) are what allow multiple Admin actions on multiple Admin nodes? Yes. Heinz > > Anyway, just some friendly advice: follow the docs :) > > > On Wed, 2006-02-22 at 08:27 -0500, Joshua ChaitinPollak wrote: > > On Feb 22, 2006, at 8:12 AM, Patrick Caulfield wrote: > > > > > Joshua ChaitinPollak wrote: > > >> > > >> On Feb 22, 2006, at 3:49 AM, Heinz Mauelshagen wrote: > > >> > > >>> On Tue, Feb 21, 2006 at 04:22:10PM -0500, Joshua ChaitinPollak > > >>> wrote: > > >>>> Hello, I found this mention of sharing Volume Groups across > > >>>> Clusters > > >>>> on the LVM howto: > > >>>> > > >>>> http://www.tldp.org/HOWTO/LVM-HOWTO/sharinglvm1.html > > >>>> > > >>>> Am I right in assuming that this means you can have a single volume > > >>>> group active on multiple nodes in a cluster, provided that you > > >>>> doing > > >>>> mount the same logical volume on more than one node at a time? > > >>> > > >>> Yes, you assume right *but* you need a cluster filesystem (eg, GFS) > > >>> as well to be able to mount shared logical volumes on multiple nodes > > >>> at once or you mess up the data. > > >> > > >> Right, but I don't need GFS if I'm only going to mount the file > > >> system > > >> on one machine at a time, right? > > > > > > No, just a lot of care and discipline :) > > > > Great! And, my co-workers keep telling me, "You lack discipline!" > > > > _______________________________________________ > 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/ =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Heinz Mauelshagen Red Hat GmbH Consulting Development Engineer Am Sonnenhang 11 Cluster and Storage Development 56242 Marienrachdorf Germany Mauelshagen@RedHat.com +49 2626 141200 FAX 924446 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2006-02-26 13:42 UTC | newest] Thread overview: 7+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2006-02-21 21:22 [linux-lvm] Volume Groups and Clusters Joshua ChaitinPollak 2006-02-22 8:49 ` Heinz Mauelshagen 2006-02-22 12:52 ` Joshua ChaitinPollak 2006-02-22 13:12 ` Patrick Caulfield 2006-02-22 13:27 ` Joshua ChaitinPollak 2006-02-24 19:22 ` Jeff Hardy 2006-02-26 13:42 ` Heinz Mauelshagen
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