Re: Load Emulator
- From: "Jim Harrison" <jim@xxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Thu, 7 Aug 2003 09:10:45 -0700
Load simulation of ISA for one deployment may be uninteresting or even
completely invalid for another deployment.
ISA was designed to function in a variety of environments, and as such, a
single protocol test doesn't really answer the "how much can
ISA handle" question.
Since it's very much a "what kind of environment" question, you have to
determine for yourself how much of what kind of traffic you expect to pass
through ISA and then collect and use the proper load simulation tools.
There have been some tests performed to see how ISA handles specific
protocols, but they've been very focused.
Also, you have to consider your Internet connection; if you have a T1, you
can probably use a single PII-450 with 256 MB RAM for basic traffic flow,
since your bottleneck is a 1.45Mb/S pipe.
Regarding the BlockAttacker script, it's designed to operate "per server".
I can see no benefit to making it more of a DoS tool than it already is.
Frankly, I'm seriously considering discontinuing support for that script as
it's more trouble than it's worth.
It was written more as an instructional aid than anything to actually use on
a production server.
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
http://www.microsoft.com/isaserver
http://isaserver.org/Jim_Harrison
http://isatools.org
Read the help, books and articles!
----- Original Message -----
From: "Andrey Silkin" <silkin@xxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Thursday, August 07, 2003 02:50
Subject: [isalist] Re: Load Emulator
http://www.ISAserver.org
As I understand you would like to say that if there are many kinds of
the connections which can go through ISA Server (different kinds of
protocols , for example) it is not possible to create "uneversal
emulator" , because the situation is very different in each case ?On the
other hand , please tell me, why is it so difficult ? We have a number
of the standard protocol definitions. Why we cannot emulate user's
works with this protocols using any approximate "criterions of the
activity" , and we must using ISA counters of the memory , disk and
processor productivity to analyze? You are reason that each kind of
traffic is very different, but this traffic goes trough the same
ethernet adapter , disk and memory like an other processes . You are
reason concerning the VB-script. I need the script which allows
automatically block intruder by creating blocking filter . I have tried
to download similar script from Isatools.org , but it does not works
with my configuration (Enterprise->Array->Server).
Best Regards Andrey Silkin
IT Manager "ENI REPRESENTATION OFFICE MOSCOW"
-----Original Message-----
From: Jim Harrison [mailto:jim@xxxxxxxxxxxx]
Sent: Wednesday, August 06, 2003 5:26 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: Load Emulator
http://www.ISAserver.org
There is no single tool to "load" ISA, since it's not limited to a
single or small set of protocols.
You can use the WM load simulator, the Exchange load simulator,
scanline, etc. to emulate different traffic profiles through ISA until
it falls over, but the most useful testng is that which simulates your
own customer traffic.
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
http://isaserver.org/Jim_Harrison/
http://isatools.org
Read the help / books / articles!
On Wed, 6 Aug 2003 13:33:00 +0400
"Andrey Silkin" <silkin@xxxxxx> wrote:
http://www.ISAserver.org
Hi all ! I knew that there is tool for an Exchange Server 2000 which
calls "Load Emulator" . This tool can emulate loading of the server - we
can see how will it work in both situation when we have 10 or 1000000
users !
Is there anything like this for ISA Server 2000 ? I think that it will
be useful to knew what is the limit
of the effective productivity we can reach . Changing configuration and
using this tool are universal instruments
which provide ability to configure actual optimization of the server .
Best Regards Andrey Silkin
IT Manager "ENI REPRESENTATION-OFFICE MOSCOW"
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