On Wed, Dec 10, 2008 at 07:42:41AM -0800, Randy Doering wrote:
> Backup Client = Isilon NAS Unit - NDMP. NBU version is 6.5.3.

> With this?one (10+TBs, 1,643,099 files) during the backup NBU said it
> was doing a Differential, but when it was all done, it had actually
> backedup everything again.

> If I kick off another Differential this coming weekend, I certainly
> don't want to have yet another backup that gets all of the data once
> again.
> 
> Any thoughts?

Since this is NDMP, Netbackup isn't making any of the file level
decisions.  It's just passing a set of parameters to the host (dump
level, date of backup, file path, tape drive, etc...) and letting the
make the selections.
 
I don't have it in my notes, but you can up the log level of ndmp on the
isilon and view exactly what NBU is sending over.  It'll show up in the
ndmp logs.  Ah.  Found my notes...
 
On any node of the cluster, edit the file /etc/mcp/templates/syslog.conf
and change the line:
*.>=info /var/log/isi_ndmp_d
to:
*.* /var/log/isi_ndmp_d
This should increase the logging levels on the cluster for ndmp.
 
You may want to check with your support contacts before doing this, but
it's just a log level change.

With that in place, you can start a manual differential and see what it
looks to be doing.  You'll be able to kill it so it won't consume tapes
for you.  If nothing looks obviously wrong, you may have to contact
support.

Good luck!

-- 
Darren
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