>Are there any other ways to tweak amanda.conf to improve dumper performance
>(I've set the bandwith parameters to large values since it's on local disks
>and I've specified local in my disklist.
Bandwidth only affects starting a dump, not anything while the dump is
running.
>I have lsof running on Sol 2.6 7 and 8 and it rules,
>now if only your boss would decide to port it to Irix 6.5 .....
It may be because he does not have access to such a machine. Have you
asked him/volunteered access? Or sent him the explicit errors you're
getting to see if he has any ideas?
>A normal amanda session with compression takes between 10 and 15 hours,
>running whitout compression finished in 3.5 hours .
Did you use "fast" or "best" compression? I've been told, and had some
experience, that "best" often does not buy you much more space but costs
a large amount of time.
How much compression were you getting (it's listed in the E-mail)?
If you were not getting much (i.e. the data being dumped was already
compressed), that might also have an effect.
>I still noticed that the dumper process is the bottleneck, but dumper now
>gets a performance of about 3 - 4 Kbps (iso sometimes down to 250bps).
Are you sure it's dumper? Or is that just the symptom? For instance,
it could be the dump program on the client, disks on the client,
SCSI termination (or lack there of), bad cables, bad controller, your
network connection, other workload on the system at the same time,
disk/controller/bus contention between the backed up disk and holding
disk, ditto for the tape drive if the image goes direct to tape, etc.
>Gerhard den Hollander
John R. Jackson, Technical Software Specialist, [EMAIL PROTECTED]
