Also you can use bperror to get duplicate throughput.

bperror -all|grep "successfully read (duplicate) backup id"

-Shyam

On 9/18/06, Andrew Sydelko <andrew at sydelko.org> wrote:
>
> On Mon, 18 Sep 2006 11:58:38 -0500 (CDT)
> Joe Royer <jroyer at digitalmotorworks.com> wrote:
>
> > Forgive me if this has been asked before, I'm a bit behind on reading
> > the list.
> >
> > How do you keep your LTO3 drives spinning fast enough?
> >
> > I have a meeting with an idiot manager who refuses to believe that we
> > can't stream fast enough to use LTO3 without damaging the tape and/or
> > drive.  I have limited DSSU space.  I have been in environments in the
> > past where shoeshining was normal and so was the 20% failure rate and I
> > don't want to go back.  It is my understanding that most people aren't
> > spinning LTO3 fast enough and are living with higher failure rates.
>
> Keep in mind that LTO3 drives are able to stream at several different
> rates, so even if you can't get the full bandwidth that the drive can write
> at, as long as it's greater than 20MB/sec, you're not harming the drive.
>
> > The only thing I can think of is to send everything to DSSU first (TSM
> > anyone?), but NBU sucks at telling you the throughput there so I'm not
> > sure I trust that anyway.  Any tricks for getting throughput numbers out
> > of NetBackup (5.1) DSSU duplicates are very welcome.
>
> If you look at the "All Log Entries" report, you should be able to see the
> bandwidth of your duplicates. These entries come from
> /usr/openv/netbackup/logs/bptm/log.<date> or
> /usr/openv/netbackup/db/error/daily_messages.log.
>
> > My backup master with a 6-drive internal RAID-10 can barely hit 27MB/s
> > reliably doing OS backups, but my DSSU is on SATA SAN drives and hard
> > to measure.
>
> We've been very happy with the 3-ware controllers and SATA disks. Getting
> more than 80MB/sec out of them at times.
>
> --andy.
>
> --------------
> Andrew Sydelko
> Engineering Computer Network
> Purdue University
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>
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