Date: Sat, 10 Feb 2007 00:48:06 -0600 From: Eric Anderson <anderson@freebsd.org> To: Chris Haulmark <chris@sigd.net> Cc: freebsd-fs@freebsd.org Subject: Re: UFS2 with SAN Message-ID: <45CD6AA6.1000003@freebsd.org> In-Reply-To: <6FC9F9894A9F8C49A722CF9F2132FC2204C9DAAE@ms05.mailstreet2003.net> References: <6FC9F9894A9F8C49A722CF9F2132FC2204C9DAAE@ms05.mailstreet2003.net>
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On 02/09/07 19:30, Chris Haulmark wrote: > Hello, > > I am looking into setting up a SAN with several web servers that > will be clustered. It would be a FC network using Qlogic cards > in each of those FreeBSD web servers. It would be about 5+ > of those web servers. > > I want to have the capability to share the same web data across > those web servers. I have scorched the entire mailing list and > found that there were some work on GFS porting over to FreeBSD. > It seems like that it is just all talk and if I am wrong, could > you have my head turned over to where I can find out how to enable > GFS on those FreeBSD systems. GFS on FreeBSD is indeed dead. Not enough people stepped up to help port it. > If GFS is out of question, which file system am I recommendeded > to attempt to use for this SAN setup? NFS. > My first thought to use UFS2 and attempt is to allow only one web > server to have a write/read access while the reminder would be > read only access. That should prevent from lockings that is similar > on NFS/NAS. This will result it the read/write system seeing the data ok, and the rest getting corrupt data without knowing it, and probably crashing. UFS2 is not cluster aware. You could mount all the hosts read only, and then update the mount point on one to rw, makes changes, then back to ro, then unmount/remount on the other boxes. That's all still a kludge to simulate what NFS will do for you. Why won't NFS work for you? I agree that it would be fantastic to have a clustered file system for FreeBSD, and I've done lot's of hunting and nagging vendors to support it - but it's just not there. Eric
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