ADSM-L

Boosting performance of the Solaris server?

2015-10-04 18:08:48
Subject: Boosting performance of the Solaris server?
From: INTERNET.OWNERAD at SNADGATE
To: Jerry Lawson at ASUPO
Date: 4/28/97 1:04AM
First, let me say that I have never taken much stock in the KB/sec
calculation - I think that since they are taken on the fly, there is some
built in error in these numbers.  For example, if there is some delay on the
server in the middle of the dat atransmission, the client sees a long
transfer time, and thus the kb/sec drops.  A more meaningful number to me is
the total amount moved, and the elapsed time - in this case 193.5 MB in 8:57.
By my calculator, this works out to be almost 1300MB/hour.  Is this
compressed data?  If so, is that reasonable for FDDI?

The other question that you should look at is "What is happening on both ends
of the pipe?"  My network guy can give you chapter and verse on why this may
not be a network problem.  How fast is your client?  your server?  how is the
connection to the server made?  Are there any bridges or routers involved
that may be causing bottlenecks?

Hopefully, you get my drift - look at the whole process, or at least what's
different between this client and the Novell client you mentioned?

Jerry Lawson
jlawson AT thehartford DOT com

______________________________ Forward Header __________________________________
Subject: Boosting performance of the Solaris server?
Author:  INTERNET.OWNERAD at SNADGATE
Date:    4/28/97 1:04 AM


Hello...

Any ideas how to make ADSM work faster than I am seeing it at the moment?

For example, doing a back up to a disk storage pool across FDDI I only
see about 500-600 Kb/sec as reported by ADSM --- even lower with
smaller files or more data.

e.g., 28 files:

Total number of objects inspected:       28
Total number of objects backed up:       28
Total number of objects updated:          0
Total number of objects rebound:          0
Total number of objects deleted:          0
Total number of objects failed:           0
Total number of bytes transferred:    193.5 MB
Data transfer time:                  350.40 sec
Data transfer rate:                  565.74 KB/sec
Average file size:                  7,079.0 KB
Elapsed processing time:           00:08:57


I am using a Sun Solaris (2.5.1) system as a server and variety of
clients (Suns, Win95, Novell).  (Oddly enough, the Novell system
managed 1200Kbytes/sec...)  Neither the server or the clients were
doing much else than the ADSM work.

For a comparision, using rcp to move the file around it can do at >
1Mb/sec.  For writing direct to a DLT drive across the network, I
 could manage 3.5Mb/sec at one point.

Any suggestions are welcome. [1]

Russell

[1] except for moving to AIX ;)
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