Yes. NFS. Mount options: rw,bg,hard,intr,vers=3,proto=tcp,rsize=32768,wsize=32768.

I’m not sure you would call it a WAN. I believe the correct acronym is LFN or Long Fat Network(right?). We have VLAN’s that we ride over the Florida LamdaRail to our colo. The RTT is around 13-14ms.

I know there are appliances out there that can solve this problem, but these backups won’t be done this way for much longer, and I just wanted to see if I could get the math right.

For our filers, I did adjust the option snapmirror.window_size to 1750000 (1Gb * .014/8), and that is working fine.

--Carl

From: tmac [mailto:tmacmd@gmail.com]
Sent: Thursday, June 07, 2007 8:29 AM
To: Carl Howell
Cc: toasters@mathworks.com
Subject: Re: NFS backups over 1Gb WAN

Are you using NFS over the WAN?
If so, what are your mount options?

If not, then are you using SnapVaul/SnapMirror over the WAN or something else?

On 6/7/07, Carl Howell <chowell@uwf.edu> wrote:

9000. And to be clear, these are backups that are going to the R200.

--Carl

-----Original Message-----
From: Tom Samplonius [mailto:tom@samplonius.org]
Sent: Wednesday, June 06, 2007 7:53 PM
To: Carl Howell
Cc: toasters@mathworks.com
Subject: Re: NFS backups over 1Gb WAN


  What is the MTU size on your WAN link?



----- "Carl Howell" <chowell@uwf.edu > wrote:
> What would be the optimal NFS settings for a filer on a 1Gb network
> with a 14ms rtt? We have moved our R200 to a remote DC and have seen
> NFS performance plummet. The NFS traffic is all backups.
>
>
>
> Thanks,
>
>
>
> -Carl

--
--tmac

RedHat Certified Engineer