RE: XCompress for ISA -- Compression Filter
- From: "Wayne Berry" <wayne@xxxxxxxxxx>
- To: "'[ISAserver.org Discussion List]'" <isalist@xxxxxxxxxxxxx>
- Date: Fri, 9 Jul 2004 16:45:18 -0700
Joseph,
I think there has been a communication error, XCompress for IIS doesn't do
any caching, it only does compression. If you want to implement compression
for cached content on the ISA server, you need to use a product like ours.
-Wayne
-----Original Message-----
From: josephk [mailto:josephk@xxxxxxxxx]
Sent: Friday, July 09, 2004 4:25 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: XCompress for ISA -- Compression Filter
http://www.ISAserver.org
Reply below
Just my comments Wayne, nothing against you. I just can't see Adding the
extra stuff to ISA server. ISA server 2000 and 2004 Have very different
object models. I've been working on similar stuff For about 2 years! Lol. I
keep finding things that keeps me guessing About how the object model really
responds to 3rd party enhancements
Thank you,
Joseph
-----Original Message-----
From: Wayne Berry [mailto:wayne@xxxxxxxxxx]
Sent: Friday, July 09, 2004 3:52 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: XCompress for ISA -- Compression Filter
http://www.ISAserver.org
Joesph,
1) Not every request is intended for an IIS server, i.e. the forward
proxy scenario. Let's say you have a ISA server as a proxy that gives
your internal users outbound access to the Internet. Some internal
users are in a branch office with WAN connectivity over a partial frame
relay. You would like them to get faster Internet access, however you
don't want to pay for more channels on the frame relay (or faster DSL,
or...) so you use compression on the ISA server and those users have
faster access.
Jk: I have tested different setups that deal with wan and local usage. I
would actually have a proxy located at each location.
Via my log monitoring I've been able to determine the common authorized
sites that are accessed and then setup a job to download that content
nightly at different times. Works great and does speed up the cashing of
web sites. Not to say that your product will or will not allow faster
access. I like using what tools I've bought and not add extra layers on
top of my system if It really isn't needed.
2) Maybe your IIS 6.0 server's CPU is taxed from serving ASP.NET pages
and you would like to offload compression to your ISA server doing
reverser proxy.
JK: Yes .NET can tax a CPU but on a twin proc machine, I've not taxed
mine at all. If the pages are designed with caching in mind then I've
not run into the issue. In setting design patterns I've been able to
create some dandy work that keeps pages flowing nicely. I see that by
adding compression to the ISA server or offloading as you suggest could
cause problems eventually with how .NET actually performs it's caching.
3) Maybe you are caching 50% of the web site's static content on your
ISA server, and you would like to compress it before it goes out so that
you save bandwidth, in this scenario IIS 6.0 is never called, even
though the page might have originated there.
JK: Again with .NET or any application if it is not designed well, then
you run into issues. What I see from my logs is that if I cache certain
items on the web page, on occasion ISA server gives different result
codes as in 304's etc. Static content would work well if you did not
have to support the multitude of browsers out there. We all know that
lately IE has been in the news and some folks are touting going to
Netscape! And maybe opera. Opera on the other hand does a nice job when
looking at pages that should be served up by a PDA.
The other side of .NET is if someone was using the view state
incorrectly no cashing in the world will help fix that.
4) Maybe you are using ISA server in front of an iPlanet, WebSphere, IIS
5.0, AS/400, and a Apache server and you want to provide one place to
maintain compression software.
JK: I'm running Iplanet and WebSphere. These items when talking with
compatible IBM products do a great job. These other products have not
yet embraced a method of caching such as .NET and IIS 6.0 but, I'm sure
that they will add on when they get opportunity.
Note: XCompress for ISA is not for IIS, it is for ISA. We sell
"XCompress for IIS" for IIS, and that is another story.
-Wayne
-----Original Message-----
From: josephk [mailto:josephk@xxxxxxxxx]
Sent: Friday, July 09, 2004 3:39 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: XCompress for ISA -- Compression Filter
http://www.ISAserver.org
How does your product differ from the caching and compression that IIS
6.0 offers And why would someone purchase your product when IIS 6.0
works great?
Thank you,
Joseph
-----Original Message-----
From: Wayne Berry [mailto:wayne@xxxxxxxxxx]
Sent: Friday, July 09, 2004 1:12 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] XCompress for ISA -- Compression Filter
http://www.ISAserver.org
ISAList:
I will take just a second to blow my own horn and try to get some Beta
Testers. We (XCache Technologies) have developed an ISA filter that
performs HTTP compression on traffic going through the ISA server in
both directions.
Basically, HTTP compression is what Google and a bunch of other
companies are using to speed their pages and decrease their bandwidth
and it doesn't require any client side code -- the browsers know how to
decompress since it is part of the HTTP 1.1 standard.
I am looking for a few Beta testers that would like to try the product,
we have developed in conjuction with Microsoft and they are testing it
already for us. Just write me off the list.
Kind Regards,
Wayne Berry
Developer
XCache Tech
http://www.xcache.com
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