[OT] Network "In Flight" data sizes

[Mark Komarinski]

On 07/24/2007 11:46 AM, Star wrote:
> Does anyone know of a tool that will help determine
> Internet-application performance throughput for overall data window
> size?
>
> My company has a client that depends on a hosted application.  While
> only one of their offices used this app, things worked very well for
> them.  Now that they're rolling it globally, they're noticing
> significant slowdowns in certain areas.  We already use Akamai and
> some fairly extreme caching settings to keep the dead-bits to a
> minimum, but the dynamic parts are showing some trouble.
>
> Essentially, they're telling us that they're seeing choke points in
> the 8k range for throughput.  We've gone through all of our equipment
> and assured that we're using 64k windows sizes on the send and receive
> sides.  Still they see this.  It's one of those "it must be on your
> end" discussions and we're working hard to get all the data that they
> request, but it's hard to quantify this "in flight" number that they
> keep touting and showing pretty graphs of.
>
> The tool that the client's group is using is Opnet IT Guru/ACE which
> is a fine tool...  but if I can get a req for $50k for software in
> under 6 months, Hell may have a need for those double hockey-sticks...
>
> Any advice is much appreciated.
>
>   
Would netpipe (http://www.scl.ameslab.gov/netpipe/) work for you?  We 
use it for checking network bandwidth with various block sizes.

-Mark