High traffic NFS performance and availability problems
dgilbert at dclg.ca
Fri Feb 18 08:22:31 PST 2005
>>>>> "David" == David Rice <drice at 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.
|David Gilbert, Independent Contractor. | Two things can only be |
|Mail: dave at daveg.ca | equal if and only if they |
|http://daveg.ca | are precisely opposite. |
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