I found reports that hint at that mirroring within LVM does exist but is unstable. Also there are reports of 2.6.9 kernel (rhel4,fc4,...) to corrupt data with software raid1 and lvm on top of that.
Don't trust your data with it unless you did the experiment with a later version and know for sure it is safe. Michael -----Original Message----- From: Joe Landman [mailto:[EMAIL PROTECTED] Sent: Thursday, May 04, 2006 11:55 AM To: Michael Will Cc: Dan Stromberg; [email protected]; Robert Latham Subject: Re: Large FOSS filesystems,was Re: [Beowulf] 512 nodes Myrinet cluster Challanges Michael Will wrote: > The question is: > > Can you use LVM to do mirroring and striping at the same time, or do > you need to use software raid1 below LVM for that? I havent tried this recently. > When having multiple chassis, the risk is that a chassis goes down and > that part of a striped LVM can affect the whole filesystem, going > offline and if the drives became corrupted for some reason, it can > have corrupted all of your data. If you used mirroring between two > physical volumes on two enclosures and then stripe across those > mirrors, you could mitigate that. I believe thats what I said. Make stripes across RAID1 mirrors. AKA RAID10. My apologies if I was unclear. Joe -- Joseph Landman, Ph.D Founder and CEO Scalable Informatics LLC, email: [EMAIL PROTECTED] web : http://www.scalableinformatics.com phone: +1 734 786 8423 fax : +1 734 786 8452 or +1 866 888 3112 cell : +1 734 612 4615 _______________________________________________ Beowulf mailing list, [email protected] To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
