sigh...

I've been following the small files thread...
Small files indeed contributes to the slow backup
But still wondering whether any other thing can be tuned to improve it.


btw...
for this setup, i have another weird problem
everytime nsrjb command issued (from gui or cmd), it will perform inventory
first before doing what it suppose to do.
for example, mounting catridge command issued, it will inventory the
library first before actually mounting the media to library.
networker used is version 6.2, and in pure windows environment.

anyone seeing this symptom before?

cheers - han


At 11/27/2002 09:27 AM, Fowler, Carter wrote:

To be honest with you, it doesn't sound like a fibre issue.  When dealing
with millions of small files, the majority of backup software will take an
extremely long time to complete it's job.

However, it used to take us 16hrs to backup 40GB of data from our Windows
NT Session Wall server to our Windows Backup server (NetWorker ver.
5.7).  We did find a patch which cut this time by about 50%.  Now that we
are using NetWorker 6.1.1 build 238 on a Win2K server, we see that it's
only taking 6hrs to backup about 45GB of data from our session wall server.

Good luck,

Carter Fowler
Hardware Service Technician
The City Of London
600  380 Wellington Street
London, ON, CA, N6A 5B5
Off: 519.661.5711
Cel: 519.870.4956
Em: cfowler AT london DOT ca




-----Original Message-----
From: k0s5 AT yahoo DOT com
Sent: 2002-11-27 5:08 AM
To: k0s5 AT yahoo DOT com; NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: slow san backup performance

hi guys..

our client recently reported a slow backup performance.
i currently run out of idea, hope the list can shed some light...:)

environtment
1 backup server w2k sp3
2 x xeon 700, 2 GB RAM
1 Emulex FC8000
1 Emulex FC7000
1 ATLP6000 w/ 12 DLT7K
1 ATLP3000 w/ 6 SDLT

8 storage nodes
w2k sp3
2 x emulex 8000
san disk 3 x 130 GB
millions of small files, average size 40K/file.
storage box: 2 x fc4500 (total 2.4TB) and 1 x hp512 (2.6TB)

emulex details:
firmware 3.02
driver version 2.11a2


When the backup start, the backup speed ranging from 300KB/s to 2MB/s
But the speed can easily drop to 50KB/s and stays there forever.

I guess small files contributes to this problem,
but with the speed of only 50KB, there must be something is not correct
somewhere.

So any of you guys using emulex hba with w2k, please share the firwmare and
driver version used

any other idea deeply appreciate...



Network diagram (simplified)

                 backup svr
         ____________|  |_____________
         |                            |
       brocade                      brocade
    ___|  | |______               ___|  | |______
    |      |       |              |     |       |
2xFC4500 |      4 SN           1xXP512 |      4 SN
           |                            |
         ATL P3K                       ATLP6K




cheers - han

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cheers - han

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