Perhaps someone could shed some light on how to interpret the backup
statistics I get in dsmsched.log. The client and the server are the same
machine (AIX 4.1.3 on a C20) and we're running ADSM V2. The tape drive is
a scsi-attached 3590-B11.
This is the first incremental backup (and therefore it's backing up
everything). I know there's over 5GB of data on my client, but
dsmsched.log shows:
TOTAL NUMBER OF BYTES TRANSFERRED: 1.9 GB
DATA TRANSFER TIME: 4,598.83 sec
DATA TRANSFER RATE: 452.40 KB/sec
AVERAGE FILE SIZE: 166.8 KB
ELAPSED PROCESSING TIME: 3:35:15
I am *not* doing software compression.
My questions are:
1) Why is the "TOTAL NUMBER OF BYTES TRANSFERRED" so low?
2) Can any of these numbers be trusted? I calculate a data transfer rate
of 433.22 KB/sec (1.9GB/4,598.83sec).
3) And finally, if we really are getting only about 0.5 MB/sec
throughput, why is it so slow? 3590-B11s are rated much much higher.
I wasn't expecting the theoretical maximum, but 0.5 MB/sec is not even
close.
Thanks in advance.
/ Larry Anta | Ryerson Polytechnic University \
\ lanta AT acs.ryerson DOT ca | Toronto, Canada (416) 979-5000 Ext.6817 /
|