CSM vs CSS11000

[aservin]

We have a webserver farm working very well since two years in a CSS11000. Now we are changing to the CSM. We have deployed the scenario with the CSM exactly the same as the CSS11000 to test it before production. When we compare the download speed from both installations we see that the server farm in the CSS11000 is a little faster than the CSM.

We are traying to figure out what is going on, the network topology is the same to both, the only diference is the destination of traffic, to the CSS1100 or the CSM. The upstream neighbor to both is the same MSFC2 from the Cat 6500.

Any ideas in how to troubleshooting using the commands of the CSM or the CSS1100 (preferly from the CSM).

Any help will be more than welcome.

Best Regards

[Gilles Dufour]

what kind of content rules do you have ?

Layer 3,4,5 ?

When comparing a single session, I don't know if the CSM should be faster than the CSS.

However, once the number of sessions becomes much higher, the CSM will give you much better performance.

Regards,

Gilles.

[aservin]

It is just L4.

We have noticed that the time to received the first byte is faster in the CSS than in the CSM. Then, the time to download the rest of the page is the same (or even better in the CSM) in both. We have times for the CSS to download the First Byte around 3 seconds while the CSM takes 6 seconds. The rest of the page is download in .1 seconds in both equipment.

I do not know if the problem is a fine tunning of the serverfarm/vserver in the CSM or a problem in how the webservers are getting the information that is delivered in the webpages that we are cheking to compare.

Thanks

-as

[Gilles Dufour · Accepted solution]

Looks to me like there must be something wrong somewhere else.

Did you sniff the traffic between csm and server ?

How long does it take for the server to respond ?

Is it the same time with the CSS ?

Gilles.

[aservin]

You are rigth.

We put local content in the webservers and we saw they (and the CSM) responding incredibly fast. We review then the connection with de Application Server and we found CRCs errors. It was supposed to be ok, but somebody forgot to configure the duplex and speed in one server.

Thank you for you reply.