ADSM-L

Re: ADSMconnect agent for Exchange throughput

1999-08-30 04:51:04
Subject: Re: ADSMconnect agent for Exchange throughput
From: Simon Watson <simon.s.watson AT SHELL.COM DOT BN>
Date: Mon, 30 Aug 1999 16:51:04 +0800
Lau,

Why not try a simple ftp to see what network transfer rates you can
actually get.  You may have a router or something in between which is
causing the bottleneck.  In my experience the network transfer rate
will generally be only limited by the network infrastructure.  We are
getting a ntr of about 15 GB/hr over standard 100BT from UNIX to UNIX,
although it is generally a bit smaller for NT.

Cheers,
Simon
----------
| From: Rene.Lambelet /  mime, , , Rene.Lambelet AT NESTLE DOT COM
| From: Rene.Lambelet /  mime, , , Rene.Lambelet AT NESTLE DOT COM
| To: ADSM-L /  mime, , , ADSM-L AT VM.MARIST DOT EDU
| Subject: Re: ADSMconnect agent for Exchange throughput
| Date: Monday, 30 August, 1999 4:06PM
|
| Hello Lau,
|
| we have an OS/390 server, 3.1.2.20, ATM connection via CISCO CIP card,
| Exchange running on a Compaq 7000 (2x400 MHz):
|
| we have a rate of 4 GB / hour for backups with the Adsm agent for Exchange.
|
| Regards,
|
| Rene Lambelet
| Nestec SA - 55, Av. Nestle - CH-1800 Vevey
| Tel: ++41'21'924'35'43 / Fax: ++41'21'924'45'89
| E-Mail: rene.lambelet AT nestle DOT com
|
|
| > -----Original Message-----
| > From: Eliza Lau [SMTP:lau AT VTCAT.CC.VT DOT EDU]
| > Sent: Tuesday, August 10, 1999 9:45 PM
| > To:   ADSM-L AT VM.MARIST DOT EDU
| > Subject:      ADSMconnect agent for Exchange throughput
| >
| > ADSMers,
| >
| > What throughput is everyone getting out of the ADSMconnect agent for
| > Exchange?
| >
| > The setup:
| > AIX 4.3.1 server running ADSM 3.1.2.13.
| > 3494 with four 3590 drives (device data rate - 32G/hr)
| > ADSMconnect agent 1.1b
| > 100mb ethernet connection for the ADSM server and the Exchange server
| >
| > It takes the ADSMconnect agent 2.85 hours to backup the 8G Exchange
| > database
| > with a network transfer rate of 3.04GB/hr.  I am using the performance
| > settings
| > recommended in the "Using ADSM to Back Up and Recover Microsoft Exchange
| > Server"
| > redbook.  It states that the throughput maximum that can be obtained for a
| > 100mb Ethernet network is 34GB/hr.  I am getting only one tenth of that.
| > Where is my bottleneck?  I have asked our network people to look for
| > any network problems.  The ADSM server and the Exchange server are
| > in different subnets, but they are in the same room and only 30 feet from
| > each other.  Where else should I look?  Thanks.
| >
| > dsm.opt:
| > TCPwindowsize   64
| > tcpbuffsize     32
| > txnbytelimit    25600
| > compression     off
| >
| > --------------------------------------------------------------------------
| > ----
| >  Eliza Lau
| >  Virginia Tech Computing Center                email : eliza.lau AT vt DOT 
edu
| >  Virginia Polytechnic Institute & State University
| >  1700 Pratt Drive
| >  Blacksburg VA 24060                           phone : (540) 231-9399
| > --------------------------------------------------------------------------
| > ----
|
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