In <Pine.OSF.3.96.980403084412.9865A-100000 AT curly.cc.utexas DOT edu>, on
04/03/98
   at 08:59 AM, Robert Jarry <jarry AT UTS.CC.UTEXAS DOT EDU> said:

>I am running a Backup Storage Pool for the first time and boy is that puppy
>slow!  It has been running for 17 hours and it is still on the first DLT.
>The primary pool is on a DLT 4700 and the copy pool is a single DLT 4000.
>Both devices are on the same scsi bus but I can't believe that would cause
>it to run this slow. Only 49 GB, 189K files, have been backed up in 17
>hours. There have been no errors, unreadable bytes, or unreadable files.
>The server is v2r1m12 running on AIX 4.1.5 on a R$0 (load avg 4.0).

>Please, does anyone know how I can speed things up.

>Thanks,
>Robert

>------------------------------------------------------------------------------
>Robert Jarry                             email:  r.jarry AT cc.utexas DOT edu 
>Unix
>Services                            phone:  (512) 475-9330 Academic
>Computing & IT Services
>The University of Texas at Austin

Do a 'q db f=d' and check the cache hit ratio.  If it is less than 98 add
more database buffers; in the server options file increase the dbbufpoolsize
value which is in Kbytes, i.e. 8192 = 8192k = 8 meg. This will help overall
server performance.

If your cache hit ration is already over 98, then maybe the problem is in
your i/o setup.  I can't say for sure since my platform is os/390.

You can kill the backup process and restart the server. The
backup will pick up where it left off.
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Bill Colwell
Bill Colwell
C. S. Draper Lab
Cambridge, Ma.
bcolwell AT draper DOT com
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