We are having exactly the same problems on both of our DEC systems.
We are running Ultrix 4.3 and AFS 3.3 on our systems.
Our DEC machines operate as the file servers as well as client systems.
We complained to Transarc about this some time ago but there was
no resolution of the problem. It was just assumed that our systems are
overloaded and slow because of the load. But I have always suspected
some other problem with AFS 3.3.
When we first started our AFS cell on these machines, it seemed faster.
I think we started with 3.3beta because that was the first AFS version
that worked with Ultrix 4.3 as I recall.
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| Joe Ramus NERSC Livermore (510) 423-8917 [EMAIL PROTECTED] |
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>> From: Chuck Silvers <[EMAIL PROTECTED]>
>> To: [EMAIL PROTECTED]
>> Subject: afs 3.3 and 3.3a slowness on pmax_ul43a?
>> Date: Tue, 02 Aug 94 15:35:51 -0400
>> Sender: [EMAIL PROTECTED]
>> Content-Length: 1316
>>
>>
>> We've been noticing a performance problem with afs 3.3 and 3.3a
>> on pmax_ul43a (both ultrix 4.3a and 4.4), and I'd like to hear from
>> anyone else that is experiencing it.
>>
>> The symptoms we're seeing are:
>>
>> 1. Sometimes there is a pause of about 10-20 seconds when
>> running small programs out of afs that have been run recently.
>> There is no disk activity during the pause and the process
>> is not interruptible. Other disk accesses seem to block as
>> well until the program in question comes back. Eventually
>> the program starts and the machine generally seems to come
>> back to life.
>>
>> 2. The time it takes to stat() large numbers of files is greatly
>> increased. We use the "depot" program from Andrew, which spends almost
>> all of its time stat()ing files in afs, and the running time
>> of this program changes from 8 minutes to about 50 minutes
>> when all I change is the version of afs from 3.3beta to 3.3 or 3.3a.
>>
>> Afsd is being run with "-nosettime" but no other arguments.
>>
>> I realize that these things happen from time to time with afs in
>> general, but the performance difference between 3.3beta and 3.3 or 3.3a
>> is enough that the machine seems quite a bit slower in general.
>>
>> Anyone seen anything like this?
>>
>> (This is with the binary distributions from Transarc.)
>>
>> -Chuck Silvers, CMU School of Computer Science Facilities
