RE: [Xen-users] storage question

John Madden
Fri, 30 Jan 2009 18:14:43 -0000

> We have another one of these NFS servers that we do the backups to
> (rysnc) and the performance is such that we can''t have more than
two
> servers backing up to it as the same time.  So I doubt putting a
> dozen VM servers (or even Xen servers for that matter) will do very
> well.  We are seeing about 20MB/sec throughput.

Writes and random i/o to devices like that will always be bad, but on
the other hand, you could probably make a compelling argument *to* use
one depending on the use case.  If all you''re doing is low-end web
serving, I bet the setup would be fine, as much as the idea of serving
root filesystems off of NFS irks me.  At any rate, you can likely
build a better-performing NFS box out of commodity components for less
money.

John





--
John Madden
Sr. UNIX Systems Engineer
Ivy Tech Community College of Indiana
jmadden@ivytech.edu