Re: [BackupPC-users] NFS woes

[Les M. <les...@gm...>]

On 4/19/2011 9:43 AM, Timothy J Massey wrote:
>
>  > Everything appears to be working correctly. I can backup and restore
>  > with no errors. However, the performance is worse than atrocious and
>  > I can't believe everything is working
>
> I agree strongly with Adam. Most likely, your problem is not a BackupPC
> issue, but an NFS issue. To determine this, do some performance testing
> with dd. If you see the same issue there (and I think you will), you can
> then start to debug your NFS issues.
>
> I also agree strongly with Adam: NFS and performance do *not* mix. I
> have put much work into making NFS work with high performance for use as
> a VMware datastore. All of my research led me to believe that it's just
> not possible without using very high-end hardware with large
> battery-backed cache. You might find my research helpful--at the very
> least, it will show you how to perform the testing using dd.
>
> http://communities.vmware.com/thread/263165?start=0&tstart=0
> <http://communities.vmware.com/thread/263165?start=0&tstart=0>
>
>
> Having said all of the above, the results you are seeing (*minutes* for
> a webpage to display) do not seem like expected low-end performance,
> they sound like something is *broken*.

Yes, that doesn't seem right, unless perhaps it is while simultaneously 
writing backups.   The easiest fix might be to rip the drives out of the 
badly-performing nfs server and put them in the linux box running backuppc.

-- 
   Les Mikesell
    les...@gm...