Answer to Question 1 :
We set the Thresholds of the backuppool as it follows :
Before the backup process (6 pm) : HIGH 090 LOW 000
After the backup process (6 am) : HIGH 010 LOW 000
Since we made this, we had no problems with the migration process

andreas rensch
rz-qs / (06171) 66 3692
renscha AT alte-leipziger DOT de

> -----Ursprüngliche Nachricht-----
> Von:  Joseph Vicini [SMTP:vicini AT SOLUTIONTECHNOLOGY DOT COM]
> Gesendet am:  Montag, 8. März 1999 14:24
> An:   ADSM-L AT VM.MARIST DOT EDU
> Betreff:      Migration Levels and 3590 Drives
> 
> I have 4 3590 drives in a 3494 library.   ADSM clients are writing to
> disk pools
> and data is migrated to tape.    Questions are:
> 
> 1. Given that my disk storage pools are not large enough to hold all
> of the data
> from clients without filling up a few times, how should I set my HIGH
> and LOW
> Migration levels to get the best throughput ?
> 
> 2.  Reading through the IBM 3590 operators guide, I see that they
> suggest
> setting the tape block size (on AIX) to "0" (variable block size
> What block
> size are you setting for your 3590 drives ?
> 
> 3.  If I change, the block size of my 3590 drives from "0" to some
> fixed value,
> won't this cause problems for data backed-up with a variable block
> size ?