<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Patrick,<br><br> 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.<br><br> 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.<br><br>Best Regards,<br>Luis Freitas<br><br>--- On <b>Wed, 12/9/09, Patrick J. LoPresti <i><lopresti@gmail.com></i></b> wrote:<br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"><br>From: Patrick J. LoPresti <lopresti@gmail.com><br>Subject: [Ocfs2-users] Combining OCFS2 with Linux software RAID-0?<br>To: ocfs2-users@oss.oracle.com, linux-raid@vger.kernel.org<br>Date: Wednesday, December 9, 2009, 9:03 PM<br><br><div
class="plainMail">Is it possible to run an OCFS2 file system on top of Linux software RAID?<br><br>Here is my situation. I have four identical disk chassis that perform<br>hardware RAID internally. Each chassis has a pair of fiber channel<br>ports, and I can assign the same LUN to both ports. I want to connect<br>all of these chassis to two Linux systems. I want the two Linux<br>systems to share a file system that is striped across all four chassis<br>for performance.<br><br>I know I can use software RAID (mdadm) to do RAID-0 striping across<br>the four chassis on a single machine; I have tried this, it works<br>fine, and the performance is tremendous. I also know I can use OCFS2<br>to create a single filesystem on a single chassis that is shared<br>between my two Linux systems. What I want is to combine these two<br>things.<br><br>Suse's documentation<br>(<a
href="http://www.novell.com/documentation/sles11/stor_admin/?page=/documentation/sles11/stor_admin/data/raidyast.html" target="_blank">http://www.novell.com/documentation/sles11/stor_admin/?page=/documentation/sles11/stor_admin/data/raidyast.html</a>)<br>says:<br><br>"IMPORTANT:Software RAID is not supported underneath clustered file<br>systems such as OCFS2, because RAID does not support concurrent<br>activation. If you want RAID for OCFS2, you need the RAID to be<br>handled by the storage subsystem."<br><br>Because my disk chassis already perform hardware RAID-5, I only need<br>Linux to do the striping (RAID-0) in software. So for me, there is no<br>issue about "which node should rebuild the RAID" etc. I understand<br>that Linux md stores meta-data on the partitions and is not cluster<br>aware, but will this create problems for OCFS2 even if it is just RAID<br>0?<br><br>Has anybody tried something like this? Are there alternative
RAID-0<br>solutions for Linux that would be expected to work?<br><br>Thank you.<br><br> - Pat<br><br>_______________________________________________<br>Ocfs2-users mailing list<br><a ymailto="mailto:Ocfs2-users@oss.oracle.com" href="/mc/compose?to=Ocfs2-users@oss.oracle.com">Ocfs2-users@oss.oracle.com</a><br><a href="http://oss.oracle.com/mailman/listinfo/ocfs2-users" target="_blank">http://oss.oracle.com/mailman/listinfo/ocfs2-users</a><br></div></blockquote></td></tr></table><br>