I suggest you run NCVU and see if it comes up with any problems with you 
network settings.   We found we were running out of sockets, I think. 
There are papers on the internet on setting up the 100Mb interfaces on the 
server - depends on your server of course - but I'm sure I've seen one for 
the Sun.  Often they say make sure you lock the interface at 100Mbs FDX.

You can try 3-way within the Celerra if you have multiple Data Movers.  I 
found it very slow.

Certainly the remote NDMP backup will be slower than NDMP backup direct 
off the Celerra, which also is slow-ish.    I can get the stated rate 
(15MB/s for LTO Gen 1) if I test with synthetic data, nice big 10MB files, 
non-compressible data.   But real world files are about 7-8MB/s for full 
backups, and much less for incrementals.   So it depends on your files.

Overall I'd recommend you use NDMP backup.

It is said that a future version of DART will address this, and will be 
nearer a 'normal' server.

William D L Brown

veritas-bu-admin AT mailman.eng.auburn DOT edu wrote on 12/11/2003 10:45:21:

> I've also asked about this, getting similar symptoms...  Any info much
> appreciated...
> 
> Fabien.LIOU AT fr.thalesgroup DOT com wrote:
> > Hello,
> >
> > Does anyone have tips about how to speed up Remote NDMP backups ?
> >
> > On some backups, we have ugly performance like 90Ko/s!!
> >
> > We are on NBU 4.5fp5 with 100Mb/s ethernet interface on datamover
> > (Celerra) and LTO2 drives.
> >
> > Fabien
> >
> > _______________________________________________
> > Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
> > http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
> 
> _______________________________________________
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