Re: [Xen-users] LVM over Xen + Network
Thanks Fazar. I was looking for least expensive possible options.|
ServerLoft being one of them but limitation of 500 GB per machine max.
It sounds like I should figure out other better options which will provide expandability at lower costs.
On Tue, Oct 27, 2009 at 8:42 AM, Fajar A. Nugraha <fajar@xxxxxxxxx>
If by "efficiently" you mean "I need one server to have more storage
On Mon, Oct 26, 2009 at 10:50 PM, rajan chandi <chandi.rajan@xxxxxxxxx
> Thanks Javier for setup ideas.
> We are using ServerLoft Dedicated hosting.
> So, don't have much control over what can be done from a hardware
> Their servers are good and cheap.
> Only problem is that they don't support anything above 500 GBx2 with RAID 1.
> We are trying to figure a work-around to use the storage across the servers
> more efficiently.
> Is there a possibility to use LVM2 with some kind of NFS/GFS?
than what is physically available to it", then yes, it might be
possible. I'd generally say it's not worthed though. Way too much
For example :
- you have two servers with 500G disk each
- both is setup using partitions, one 50G (system) and one 450G (for
LVM PV). These are approximate values.
- you share second partition of server 2 using iscsi
- import iscsi share from server 2 on server 1
- setup LVM on server 1 using its own 2nd partition and server 2's
iscsi share. You'll get 900G VG.
Gotcha in this setup: if server 2 is dead, you might lose your data.
Workaround: you need 1 other server : say server 3. The setup now becomes:
- server 2 and server 3 share its partition using iscsi
- server 1 import iscsi share from 2 and 3, and setup it as mirror
using Linux md
- setup LVM on server 1 using its own 2nd partition and a mirror of
server 2 and 3's iscsi share
In this setup server 2 and 3 mirrors each other's data, so you can
have a single disk or stripe (RAID0).
Gotcha in this setup: you need to fine-tune iscsi so that in doesn't
retry forever when server 2 or 3 is dead.
See why I say it's too much effort?
It'd be MUCH easier to simply buy a 2U server with 14 3.5" drives,
have them host it (so it's colo instead of dedicated server), and use
it as iscsi/nfs server.
Xen-users mailing list