[CentOS-virt] Can I use direct attached storage as a shared filesystem in Xen
rhdyes at gmail.com
Tue Feb 9 15:46:32 UTC 2010
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.
Server 1 is the main server and server 2 is the backup server.
This is my set up now.
Each is running Centos 5.3
I have virtualization set up on them so this is the setup:
These are the quests.
1. Samba 1 with 3 terabyte block device
2. Samba 2 with 2 terabyte block device
3. Samba 3 with 2 terabyte block device
4. Lotus Domino 3 terabyte block device.
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.
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
On Tue, Feb 9, 2010 at 10:23 AM, Ben M. <centos at rivint.com> wrote:
> Rich wrote:
> > I want to make the 10 terabytes raid an xfs filesystem and then share
> > the drive with all 4 of the vm's. 3 of the servers will be samba
> > servers and one will be my Lotus notes server. I want to make the
> > filesystem /data and then each one of the servers will use specific sub
> > directories. I have it set up as block devices now but I want the
> > flexibility of having the whole 10 terabytes available to all 4 servers.
> > On Tue, Feb 9, 2010 at 1:28 AM, Christopher G. Stach II <cgs at ldsys.net
> > <mailto:cgs at ldsys.net>> wrote:
> > ----- "Adam Adamou" <adam0x54 at gmail.com <mailto:adam0x54 at gmail.com>>
> > wrote:
> > > either nfs or ocfs2. nfs is the easiest route. ocfs2 will give you
> > > clustered filesystem.
> > Except NFS doesn't follow normal filesystem semantics and you can
> > end up with corrupt data without knowing it, and it, along with
> > CIFS, will give you a free shitload of network overhead to go along
> > with your possibly corrupt data. OCFS2 or GFS are the only practical
> > choices if you want it to behave like a typical filesystem and not
> > have to worry about catering to it or rewriting software and/or
> > reeducating developers, and OCFS2 is extremely easy to set up.
> > The original question didn't specify much about the requirements,
> > though. A single shared filesystem? Read-write or read-only? No
> > filesystem at all? Without that information, I would at first
> > recommend not sharing. It can be a lot of trouble, it's usually not
> > required, and it severely complicates life when things fail.
> > Well, there is always XenFS... :/
> > --
> Though dated, this article is interesting regarding this thread. The
> article needs to be updated (Last Modified = June 2006), and rewritten
> for CentOS Xen virtualization, but it looks sound upon my first reading:
> CentOS-virt mailing list
> CentOS-virt at centos.org
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