Thread View: comp.sys.sequent
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Started by Markus Hess
Wed, 26 Sep 1990 09:29
Problems with NFS (Sequent <-> Sun)
Author: Markus Hess
Date: Wed, 26 Sep 1990 09:29
Date: Wed, 26 Sep 1990 09:29
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I'm working as a systemadministrator and systemprogramer for a publishing company and i'm responsible for a lot of UN*X computers, including Sun and Sequent Balance. Last week, i've updated the Suns to the new OS Version 4.1 and encountered a problem with NFS: The Sequent, running DYNIX 3.0.12.1 and operating as server for the Suns, now cause NFS errors (NFS server ... not responding, still trying :-( ) to filesystems mounted on the Suns. The transfer rate dramatically slowed down to about 10KB a second. Using SUNOS 4.0.x, we have no problems. I think, that the Sequent NFS Version used in DYNIX 3.0.12.1 is out of date, but i don't know exactly. While looking to netstat(1N) output on the Sequent, the problem seems to be that the Sequent drops a large amount of IP fragments because of timeouts. Has anyone else got the same problem before? Can anyone help or give a hint, how to solve this very annoying problem? Thanks for any help in advance. Markus
Re: Problems with NFS (Sequent <-> Sun)
Author: Steve Elliott
Date: Thu, 27 Sep 1990 08:09
Date: Thu, 27 Sep 1990 08:09
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In article <5996@balu.UUCP> urmel@cosmo.uucp (Markus Hess) writes: > >Last week, i've updated the Suns to the new OS Version 4.1 and encountered >a problem with NFS: > > The Sequent, running DYNIX 3.0.12.1 and operating as server > for the Suns, now cause NFS errors (NFS server ... not responding, > still trying :-( ) to filesystems mounted on the Suns. > The transfer rate dramatically slowed down to about 10KB a second. > Using SUNOS 4.0.x, we have no problems. I think, that the Sequent NFS > Version used in DYNIX 3.0.12.1 is out of date, but i don't know > exactly. > > >Has anyone else got the same problem before? Can anyone help >or give a hint, how to solve this very annoying problem? >Thanks for any help in advance. > >Markus I was just about to ask a similar question myself. Several of my users have reported problems when working on a Sun SparcStation with user files NFS mounted from a Symmetry S81, DYNIX 3.0.15. It got so bad I eventually rang up Sequent for advice. The conversation went like this: Me: "We're getting NFS error messages on our Sequent" Sequent: "What other machines?" Me: "Sun SparcStations" Sequent: "I knew you were going to say that...." Apparently SparcStations throw out Ethernet packets at such a speed that the Sequent can't keep up with it. I was told that old SCED boards might be adding to the problem, but that even with the most uptodate SCEDs there will still be a problem. The guy I spoke to suggested that we tweaked our Suns to transmit Ethernet packets slower! He added that the only real solution is for Sequent to develop a faster driver. Steve -- se@uk.ac.lancs.comp Department of Computing, Engineering Building, University of Lancaster, Bailrigg, Lancaster, LA1 4YR, UK PHONE: +44 524 65201 ext 3783.
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