Will WAAS be worth it?

Hello,
We have our headquarters in New York and a remote office in Chennai India. The circuit between the offices is a 10mbps MPLS with a big provider.
The performance of web applications is fine. Users start to complain when it comes to Windows file transfers or admins trying to deploy software packages to PCs in Chennai. I used this math to figure out what the best throughput could be given the latency and the TCP Window size:
TCP-Window-Size-in-bits / Latency-in-seconds = Bits-per-second-throughput
And what I got was a little over 2.0 mbps of maximum throughput for a tcp session. Not surprising given the latency of 235ms. Window size was around 50,000 bits.
So my questions is could a WAAS device in each office make any difference at all for the apps that are transferring data? I mean you cant cheat the speed of light right?
I have tried to show MGMT the math and I get rolling eyes. They just want it to go faster, and the worst thing that could happen is we spend the money on WAAS and there is no noticeable improvement. Instead of rolling eyes, they'll be rolling me out the door.
Any advice is much appreciated.
P.

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Windows Server 2008 should already have CTCP enabled; but Windows 7 hosts might not.
Using a module has the all the normal pros and cons. So, cannot say a stand alone unit would be better, although the latter does provide you more selection options, including 3rd party.
Normally, yes, you need WAAS hardware at each site.
PS:
Just increasing a host's RWIN will often allow it to push a LFN to capacity. However, slow start really does become slow start when latency is high. This can also be a problem if sending lots of little files, i.e. each one starts slow. Small files might not even allow the transfer rate to reach full speed.
Also a problem is standard TCP's adaptive flow rate, which increases very slowly when latency is high after a packet is lost.
I believe there are file transfer utilities, that transfer a file using multiple TCP sessions. This can greatly increase the transfer rate on a LFN.

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Inxsible wrote:
cubeist wrote:
Re: #6
Getting to know pacman as a new user is time well spent. There is a great wiki, but also 'man pacman' will display all the options available.
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I should have been more clear. It's usefull sometimes to use both, incase you manually(or accidentally) deleted dependencies for example, they won't show up in Qs but Ss they will
Edited ---
On another topic.... since I already got in trouble for making a second post...
ngoonee wrote:@cubeist, while your assistance is well-appreciated, perhaps the 'edit' button would be more useful next time .
why?
20 mins after my first post I had a second train of thought that was slightly different from my first post? My understanding of "edit" is to alter the context of what is already written. But if I am violating forum rules of some sort, I apologize.
Last edited by cubeist (2010-08-16 00:14:52)

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