[THIN] SV: Re: Expand Accelerators
- From: "Svein Arild Haugum" <svein@xxxxxxxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Thu, 20 May 2004 15:31:49 +0200
One thing worth to mention is that Expand requires encryption turned =
off. This is so the Expand boxes can recognize the data patterns.
The Expand boxes would make data unreadable due to fuc**ng up the ica =
traffic. But to and from the Expand boxes its unencrypted.
This can in certain enviroments be a problem.
Mvh
Svein Arild
-----Opprinnelig melding-----
Fra: Ron Oglesby [mailto:roglesby@xxxxxxxxxxxx]
Sendt: 19. mai 2004 17:28
Til: thin@xxxxxxxxxxxxx
Emne: [THIN] Re: Expand Accelerators
I did some tests with Expand (well me and some guys at my old company =
with
an expand engineer). Now this was a couple of years back but over a
simulated 56K the routers were clocking 256K line spd and we had like 9 =
or
10 clients running if I remember right.=20
Now what they do is look for data passing their box going to the remote =
site
(with another expand box). If they see the data pass twice they flag it =
and
cache it at both sides. Any time after that, if that data passes again, =
they
just pass a marker instead of the big chunks of data and on the other =
end
the receiving device pulls up that cached data and send it to the remote
router just as if it had come over the line. This works at the packet =
level
and supposedly works very well with Citrix. I believe at the time they
called it Enterprise caching. Kinda like a web cache but instead of =
pulling
data in and caching it they were moving data out to the edges of the =
network
and caching it there.=20
Repetitive data (like the same application screens over and over) works
pretty well and is where is you would get the best performance. Of =
course
The trick is with a satellite you often have latency issues that could
factor into this that they don't really fix.=20
Anyway it was a cool product. I have talked to some people that have it =
and
they liked it. But I have never put it in myself. =20
Ron Oglesby
Senior Technical Architect
Microsoft MVP - Windows Server
=20
RapidApp, Chicago
Mobile 815 325-7618
Office 312 372-7188
e-mail roglesby@xxxxxxxxxxxx
=20
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On =
Behalf
Of Russell Robertson
Sent: Wednesday, May 19, 2004 5:23 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Expand Accelerators
That's my thinking too, can it be that good? Expand have a slew of case
studies relating to Citrix though on their web site. This one
http://www.expand.com/include/casestudy/NTT_Communications.pdf sounds
amazing, albeit they are using Frame Relay.=3D20
I have a call with an Expand distibutor pending. It will be interesting
to see what they come back with.
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of Andrew Rogers
Sent: 19 May 2004 11:02
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Expand Accelerators
Looks like they compress the data to me.. would ICA benefit from this
much?=3D3D Wouldnt have thought so, since its meant to be pretty =3D
efficient
anyway?
Maybe some of the technical people can shed more (?!) light :)
Andrew
--o--
>>> russell.robertson@xxxxxxxxx 19/05/04 10:59:19 >>>
Hello everyone
I'm looking at a problem where we'd like to get a remote site with a
128K satellite link to be able to host up to 15 users all on Citrix.
Taking the general rule of thumb to be 20k per session, I would need
300k of bandwidth. Upping the link isn't a solution.
The Expand accelerators (www.expand.com) seem too good to be true, the
sales docs suggest that they could easily get 15 Citrix users on a 128k
link. Does anyone have any real world experience with Expand, good or
bad?
Thanks
Russell
Russell Robertson CCEA
Skibo Technologies
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