I am doing rsync now. What is the difference between ocf2 and gfs? On Tue, Feb 9, 2010 at 1:28 PM, Adam Adamou <adam0x54 at gmail.com> wrote: > Keep it simple. ocfs2 - very easy to configure clustered filesystem > and drbd for replication or rsync them nightly(depending how much data > you can afford to lose). Something to keep in mind for drbd - You must > have backups! - Your second server will be replicating what you have > on your primary. For example, you accidentally remove some files and > it gets synced to the backup you get screwed. > > my .02 > > -Adam > > On Tue, Feb 9, 2010 at 12:46 PM, Christopher G. Stach II <cgs at ldsys.net> > wrote: > > ----- "Rich" <rhdyes at gmail.com> wrote: > > > >> I think the better question is this. How can I make my 2 physical > >> servers that are identical into the best clustered solution sharing > >> the storage between the 2. > > > > Do you want the storage to be redundant between the two like RAID 1 or > just all of it accessible to any guest on either machine like a JBOD? For > either, you can use a suitable mix of drbd, iSCSI, GNBD, LVM, heartbeat, > keepalived, and a clustered filesystem. If you do the latter, remember that > this squares your risk. If you want a simple A/B failover setup where the > second physical host is idle until the first physical host fails, you can > just use drbd and heartbeat or RHCS. > > > >> They all use xfs. > >> I want to keep the guests the same on each server. > >> I will start with the backup server. I will go on each vm and delete > >> this FS and block device. > >> I then want make that whole 10 terabyte raid into one gfs and then > >> re-attach it back to each guest. > >> Is that possible or do I have to start all over again? If it can be > >> done I then will sync the date from the mainserver to this backup > >> server and then switch them and do the same to the mainserver. > > > > That sounds about right. You need to make your backups (!), destroy the > data on of your servers by creating the new clustered filesystem, copy the > data from the other server, and then share it with your reconfigured guests. > So, basically what you said. > > > >> I have one more question which is another whole thread. > >> I am using rsync to sync the 2 physical boxes now. Is there a better > >> way to do this? > > > > drbd, but rsync does a pretty good job in a lot of use cases. I wouldn't > say that it fits this one, though. > > > > -- > > Christopher G. Stach II > > http://ldsys.net/~cgs/ <http://ldsys.net/%7Ecgs/> > > _______________________________________________ > > CentOS-virt mailing list > > CentOS-virt at centos.org > > http://lists.centos.org/mailman/listinfo/centos-virt > > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > http://lists.centos.org/mailman/listinfo/centos-virt > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20100209/9b10b6c8/attachment-0004.html>