TSAFS has caching, which in most cases make the backup much faster.
You can use TSATEST.nlm from Novell to show what the performance of the
sms system is.   However this does not mean that each backup engine will
get this level of performance.  One fatal issue seems to be incremental
backups, as tsafs start to cache a file when it is referenced and some
engine (I am pretty sure legato does this) want to walk the whole file
system first to see what needs to be backed up which cause tsafs to read
the data portion as well as the file info... so it sits for a loooong
time before it goes anywhere.  This was being worked on a few weeks ago
when I talked to the sms developers.  So grab the latest and retest...
oh and there is a new tsatest that now simulates incremental backups as
well, don't know if that one hit their website yet...

Small files are always going to be slower until we stop doing file by
file backups and do blocks, etc.


George A. Raetzke, CNE
Senior Systems Programmer
Enterprise System Support
Northern Illinois University
DeKalb, IL  60115
graetzke AT niu DOT edu
815-753-8549

>>> LSS5 AT BRISBANE.QLD.GOV DOT AU 3/25/2004 6:01:16 PM >>>
Hi Wayne

I'd have to disagree with your colleague.

We got 580MB/min (last night's backup) with TSA600 on one of our
Netware 6 servers that gets backed-up by a non-Legato product to a
directly-connected tape drive.  This is a mix of large and small files.

Cheers,
Ryan.




>>> wayneu AT COASTAL DOT COM 03/26/04 01:52am >>>
I hope this helps, but I just got this message from my colleague at
brainshare today:

Subject: tsa speed

apparently tsa600 is toast.

they measured it at a max backup speed of 400MB/minute

the new TSAFS is a replacement (sp4) and they can get 6GB/min.

        -Wayne


-----Original Message-----
From: Legato NetWorker discussion
[mailto:NETWORKER AT LISTMAIL.TEMPLE DOT EDU]On Behalf Of Shawn Larson
Sent: Wednesday, March 24, 2004 3:57 PM
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: [Networker] HELP please. Any suggestions for NetWare BU
Performance Tweaks


Greetings...

Server - Solaris, running NetWorker 6.11
Media - DLT7k
Client - NetWare 6.5 running NetWorker 4.21 client.  NSS volumes on
NetWare.

We have a couple of NetWare 5.1 servers using the NetWorker 4.21 client
and
I get 'satisfactory' throughput on backups as long as I split large
volumes
into muliple streams.
However, I am trying to determine whether there is hope for improvement
on
backing up tons of 'small files.

We are deploying NetWare 6.5 and have noticed that the backup speeds
are
significantly slower... especially with 'small' files, such as in the
SYS:
volume.

Please share your experience with backing up NetWare 6.x servers.


-
Thanks for reading;
Shawn Larson -- 952 448-8090
FSI International
Chaska, Mn USA

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