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Re: Capacity planning

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I correct some typos , please read again...

Hello,

I have come to an interresting subject, if we have a distributed 
database and a webserver and HTML files and you want to do a capacity 
planning of your webserver this will complicate the things, cause the 
database server must be modelized as an hyperexponential distribution 
that is an M/G/1 queuing system , but as you have noticed since the 
database server system , in our network , comes before the internet 
connection that will be modeled as an M/M/1 queuing system, so you have 
to use a queuing network simulation to solve this problem , but if you 
have noticed, in capacity planning we have also to calculate the 
response time of the worst case performance, so this will easy the job 
for us cause in the worst case scenario since the M/G/1 queuing system 
of the database server have three exponential distributions for the 
reads and writes and deletes transactions, so we have to choose the 
worst service time that is exponentially distributed , so i think we 
have to choose only the  exponential distribution of the writes 
transactions, so this will make the queuing system of the database 
server a markovian M/M/1 queuing system, so this will transform our 
queuing network into a Jackson network so this will easy for us to 
calculate the response time of our web server, but since the bottelneck 
of the network is the internet connection so this will easy for us much 
more the capacity planning .. hence if you want to do a capacity 
planning of your webserver you have to concentrate on the very important 
part that is the M/M/1 internet connection and do your calculation.

I have done a M/M/1 and M/M/c queuing network simulation in Object 
pascal to easy for you to do capacity planning of
your webserver in Object pascal.

You will find the source code here:

http://pages.videotron.com/aminer/

Thank you,
Amine Moulay Ramdane.

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Capacity planning aminer <aminer@toto.net> - 2013-11-10 08:23 -0800
  Re: Capacity planning aminer <aminer@toto.net> - 2013-11-10 08:37 -0800
  Re: Capacity planning aminer <aminer@toto.net> - 2013-11-10 08:51 -0800

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