[OpenAFS] Craziness with cache, Input/Output error, Linux
Chas Williams (CONTRACTOR)
Mon, 21 Apr 2008 18:52:44 -0400
In message <480CDC3E.firstname.lastname@example.org>,David Thompson writes:
>> i suspect you will only see this bug if your filesystem containing the
>> cache is very close to full.
>We currently run with a cache set at boot time at 75% of the partition
>size, and this has reduced the frequency of the problem to close enough
>to zero for us. At previous higher values (85% ??) we still saw this on
>an infrequent but regular basis (across 100s of hosts).
the problem seems to be that afs gets ahead of the filesystem scavenger
thread that reclaims the blocks released by a delete. perhaps afs should
smarter in the event of a write failure, like backing off and retrying
one more time. if your cache is a seperate partition, you could try ext2.
the delete semantics on that filesystem are a bit different i think.