Capacity planning

[aminer]

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 , come before the internet
connection that will be modeled as an M/M/1 queuig 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 exponential 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.


Thank you,
Amine Moulay Ramdane.

[aminer]

Hello,

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.

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

[aminer]

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/