On Wed, Jun 24, 2009 at 2:27 PM, Samuel Bayer <[email protected]> wrote:
> Hi all - > > I've suddenly encountered some awful sluggishness with OpenAFS on my Mac, > and I'm hoping someone will be able to give me some pointers about how to > track it down. > > Here's the scoop: I've been using OpenAFS quite comfortably and happily for > a number of years. The research computing support group at our corporation > maintains an AFS cell behind our firewall, and while they don't support > Macs, they have no objection to Mac clients. Yesterday, for the first time, > I noticed that copying from the AFS cell was ungodly slow; a 70MB file was > taking ~4 minutes to copy to local disk, while a similar copy on a supported > Linux machine was taking between 5 and 30 seconds. This is new behavior; as > recently as a month ago, I'm certain that the copy time on the Mac was > comparable. > > Here's what I know: > > - It's not a network problem. Copying the same file from an NFS server on > the same subnet as the AFS server is comparable on my Mac and on a supported > Linux machine, as is scp'ing the file from a supported Linux machine. Is NFS using TCP in your environment? If it is, you haven't ruled out network yet. > > - It's not an OpenAFS version problem. I upgraded from 1.4.6 to 1.4.10 with > no resulting improvement in the performance. (I didn't do a clean install - > and I'm going to try that - but I don't have much confidence that that will > have any effect.) I doubt it will, though what's in /var/db/openafs/etc/config/afsd.options? > > - It's not a new server problem. My research computing admin tells me that > nothing has changed in the AFS configuration in the last month except that > they moved some volumes from one machine to another, but I can't believe > that would make any difference, since they're both on the same subnet and > neither of them is a machine directly listed in CellServDB. > - It MIGHT be a Mac OS problem. I upgraded to 10.5.7 about a month ago, and > it's possible that the new behavior coincided with the install, although > it's unlikely. from what?
