[OpenAFS-devel] Working around cache problems?

[Terry Gliedt]

chas williams - CONTRACTOR wrote:
> In message <42384295.6070407@umich.edu>,Terry Gliedt writes:
> 
>>We have been trying to live with OpenMosix and OpenAFS (client). It 
>>works much of the time, but about once a week one of my users comes and 
>>shows me how the AFS cache has been corrupted. Comparing files in some 
>>directory does not match files on another non-OpenMosix AFS machine.
> 
> 
> i did follow the threads for a bit a while back but i got sidetracked.
> what version of afs are you running? 1.2 or 1.3?  the lastest 1.3 should
> have some fixes related to dentry handled which might help solve some
> of your cache corruption.  also, which kernel?  smp?

Sorry, I should have included this in the first post:
   Kernel:    2.4.27
   OpenAFS:   1.3.73
   OpenMosix: patch-2.4.27-om-20041102

>>Does anyone have a trick to force AFS to refresh its cache (for a 
>>particular directory or even for all files?) The only way I know how to 
>>accomplish this is to reboot, stop in single user mode, rm -rf the cache 
>> files and let AFS rebuild everything.
> 
> 
> fs flush and fs flushv have cured corruption problems in the past
> on some of our clients.

Thanks for the tip - I was not aware of the flush* subcommands. Here's a 
little of what I saw today:


ls -la
/bin/ls: asso.S14Q00246.all.log: Bad address
/bin/ls: asso.S14Q00246.all.lst: Bad address
/bin/ls: chr14markers.txt: Bad address
/bin/ls: geno.summary.txt: Bad address
/bin/ls: global.ind.S14Q00246.all.txt: No such device
/bin/ls: global.S14Q00246.all.txt: No such device
total 103
[ other ls results as usual ]

Flushing a particular file had no effect (the same error as shown above 
appears). Flushvolume took a long time, but when it eventually 
completed, the ls -la behaved exactly as one would expect.

Thanks for the response!


-- 
=============================================================
Terry Gliedt     tpg@umich.edu       http://www.hps.com/~tpg/
Biostatistics, Univ of Michigan  Personal Email:  tpg@hps.com