Date: Fri, 18 Feb 2005 11:22:24 -0500 From: David Gilbert <dgilbert@dclg.ca> To: David Rice <drice@globat.com> Cc: freebsd-performance@freebsd.org Subject: High traffic NFS performance and availability problems Message-ID: <16918.5696.196112.640502@canoe.dclg.ca> In-Reply-To: <200502171636.10361.drice@globat.com> References: <200502171636.10361.drice@globat.com>
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>>>>> "David" == David Rice <drice@globat.com> writes: David> The problems we are having is as follows. David> 1. Slow perfomance during peek traffic periods This is due largely to the cache on your RAID hardware card. Unfortunately, this is a failure mode of hardware RAID cards you can't avoid (only delay by buying more disk). David> 2. Client boxes David> have high load averages and sometimes crashes due to slow NFS Clients waiting for nfs requests are still considered "running" David> performance. 3. File servers that randomly crash with "Fatal David> trap 12: page fault while in kernel mode" 4. With soft updates David> enabled during FSCK the fileserver will freeze with all NFS David> processs in the "snaplck" state. We disabled soft updates David> because of this. The remainder of this sounds like memory corruption. Dave. -- ============================================================================ |David Gilbert, Independent Contractor. | Two things can only be | |Mail: dave@daveg.ca | equal if and only if they | |http://daveg.ca | are precisely opposite. | =========================================================GLO================
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