Lau,

an ftp via our LAN gives transfer rate of 4-8 GB/hr.

The bottleneck seems to reside in the adsm clients because:

an mono-session backup with Adsm connect agent for Exchange gives 4 GB/hr
a multi-session backup with Backint agent for SAP (6 sessions in //) gives
34 GB/hr.

As these rates are ok for us right now, we will not investigate much further
for the moment.

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: Simon Watson [SMTP:simon.s.watson AT SHELL.COM DOT BN]
> Sent: Monday, August 30, 1999 10:51 AM
> To:   ADSM-L AT VM.MARIST DOT EDU
> Subject:      Re: ADSMconnect agent for Exchange throughput
>
> 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
> | 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
> | >
> --------------------------------------------------------------------------
> | > ----
> |