That's old. sles11 has added the pacemaker cluster stack that works with clvm.
Luis Freitas wrote: > Brian, > > Hmm, I was not aware of this. Seems Novel uses other volume > manager, called EVMS, not CLVM (?). > > From: > http://wiki.novell.com/index.php/Linux_Data_Management > > > > Some Open Source OCFS2 Features > > Oracle Linux Certification matrix > <http://www.novell.com/products/server/oracle/matrix.html> > OCFS2 project web site <http://oss.oracle.com/projects/ocfs2/> > OCFS2 Development Roadmap <http://oss.oracle.com/osswiki/OCFS2/Roadmap> > Oracle Cluster File System v2 (OCFS2) is an open source cluster > management and > .... > > * No exclusive write lock capability yet (now every lock request > returns: successful). This feature is candidate for SLE10 SP2 > (Q1 2008). > * OCFS2 on top of a software mirror is not supported yet > * *Can be managed by EVMS * > > *....* > > * OCFS2 offers integration with heartbeat2. Heartbeat2 offers a > Resource Agent 'md group take over'. (which enables fail-over of > host based mirroring of SAN volumes), but OCFS2 on top of a > software mirror is not supported. > > ... > > Best Regards, > Luis Freitas > > --- On *Fri, 12/11/09, Brian Kroth /<bpkr...@gmail.com>/* wrote: > > > From: Brian Kroth <bpkr...@gmail.com> > Subject: Re: [Ocfs2-users] Combining OCFS2 with Linux software RAID-0? > To: "Luis Freitas" <lfreita...@yahoo.com> > Cc: "Patrick J. LoPresti" <lopre...@gmail.com>, > ocfs2-users@oss.oracle.com > Date: Friday, December 11, 2009, 2:09 PM > > Luis Freitas <lfreita...@yahoo.com > <http://us.mc514.mail.yahoo.com/mc/compose?to=lfreita...@yahoo.com>> > 2009-12-11 05:40: > > Patrick, > > > > Depending on what you are using, you could use the volume manager > > to do the striping, but you need to use CLVM. So if you can, > go for > > Heartbeat2+CLVM+OCFS2, all integrated. > > > > Not sure but I think Heartbeat2+OCFS2 is only available on the > > vanilla kernels, not on the enterprise ones. Maybe Suse has > > support, I don't know, you will have to check. > > > > Best Regards, > > Luis Freitas > > Just to elaborate on these comments. Last time I checked CLVM > required > the openais/cman cluster stack, which neither heartbeat nor ocfs2 use > (by default). The userspace stack option for ocfs2 in recent mainline > kernels added support for the openais stack and pacemaker is > required to > make heartbeat work with that rather than use it's own cluster stack. > > Now, you can do an basic LVM linear span, concatenation, or > whatever you > want to call it without any cluster stack, so long as it's not striped > and so long as you heed Sunil's warning about fat fingering changes to > the thing while more than one host is using it. > > That means that if you want to add another LUN to the span you > can't do > it on the fly. You have to do something like this: > > # On all nodes: > umount /ocfs2 > > # On all nodes but one: > vgchange -an ocfs2span > # Or, to be extra safe: > halt -p > > # On the remaining node: > vgextend ocfs2span /dev/newlun > lvextend -l+100%FREE /dev/mapper/ocfs2span-lv > tunefs.ocfs2 -S /dev/mapper/ocfs2span-lv > > # You might actually need the fs mounted for that last bit, I forget. > # Probably a fsck somewhere in there would be wise as well. > > # Bring the other nodes back up. > > Brian > > > --- On Wed, 12/9/09, Patrick J. LoPresti <lopre...@gmail.com > <http://us.mc514.mail.yahoo.com/mc/compose?to=lopre...@gmail.com>> > wrote: > > > > From: Patrick J. LoPresti <lopre...@gmail.com > <http://us.mc514.mail.yahoo.com/mc/compose?to=lopre...@gmail.com>> > > Subject: [Ocfs2-users] Combining OCFS2 with Linux software RAID-0? > > To: ocfs2-users@oss.oracle.com > <http://us.mc514.mail.yahoo.com/mc/compose?to=ocfs2-us...@oss.oracle.com>, > linux-r...@vger.kernel.org > <http://us.mc514.mail.yahoo.com/mc/compose?to=linux-r...@vger.kernel.org> > > Date: Wednesday, December 9, 2009, 9:03 PM > > > > Is it possible to run an OCFS2 file system on top of Linux > software RAID? > > > > Here is my situation. I have four identical disk chassis that > perform > > hardware RAID internally. Each chassis has a pair of fiber > channel > > ports, and I can assign the same LUN to both ports. I want to > connect > > all of these chassis to two Linux systems. I want the two Linux > > systems to share a file system that is striped across all four > chassis > > for performance. > > > > I know I can use software RAID (mdadm) to do RAID-0 striping > across > > the four chassis on a single machine; I have tried this, it works > > fine, and the performance is tremendous. I also know I can > use OCFS2 > > to create a single filesystem on a single chassis that is shared > > between my two Linux systems. What I want is to combine these two > > things. > > > > Suse's documentation > > > ([1]http://www.novell.com/documentation/sles11/stor_admin/?page=/documentation/sles11/stor_admin/data/raidyast.html) > > says: > > > > "IMPORTANT:Software RAID is not supported underneath clustered > file > > systems such as OCFS2, because RAID does not support concurrent > > activation. If you want RAID for OCFS2, you need the RAID to be > > handled by the storage subsystem." > > > > Because my disk chassis already perform hardware RAID-5, I > only need > > Linux to do the striping (RAID-0) in software. So for me, > there is no > > issue about "which node should rebuild the RAID" etc. I > understand > > that Linux md stores meta-data on the partitions and is not > cluster > > aware, but will this create problems for OCFS2 even if it is > just RAID > > 0? > > > > Has anybody tried something like this? Are there alternative > RAID-0 > > solutions for Linux that would be expected to work? > > > > Thank you. > > > > - Pat > > > > _______________________________________________ > > Ocfs2-users mailing list > > [2]ocfs2-us...@oss.oracle.com > <http://us.mc514.mail.yahoo.com/mc/compose?to=ocfs2-us...@oss.oracle.com> > > [3]http://oss.oracle.com/mailman/listinfo/ocfs2-users > > > > References > > > > Visible links > > 1. > > http://www.novell.com/documentation/sles11/stor_admin/?page=/documentation/sles11/stor_admin/data/raidyast.html > > 2. file:///mc/compose?to=ocfs2-us...@oss.oracle.com > <http://us.mc514.mail.yahoo.com/mc/compose?to=ocfs2-us...@oss.oracle.com> > > 3. http://oss.oracle.com/mailman/listinfo/ocfs2-users > > > _______________________________________________ > > Ocfs2-users mailing list > > Ocfs2-users@oss.oracle.com > <http://us.mc514.mail.yahoo.com/mc/compose?to=ocfs2-us...@oss.oracle.com> > > http://oss.oracle.com/mailman/listinfo/ocfs2-users > > > ------------------------------------------------------------------------ > > _______________________________________________ > Ocfs2-users mailing list > Ocfs2-users@oss.oracle.com > http://oss.oracle.com/mailman/listinfo/ocfs2-users _______________________________________________ Ocfs2-users mailing list Ocfs2-users@oss.oracle.com http://oss.oracle.com/mailman/listinfo/ocfs2-users
