I think there are a couple of metrics involved here. 1. Traffic as mentioned by Dave. Is it all text or are there large images / flash / pdfs etc? Try and estimate the typical size of a page (including images etc) and then estimate the number of pages served per minute in a typical session (remember people like to click a lot and read a little). What we are aiming for here is a line speed to deliver an acceptable end-user response.
2. Memory. You need to run some typical user sessions and monitor the amount of RAM consumed on the web server / database server. (I'm just assuming there is a database server). The easiest way is to get the value when the machine is idle and then start one session at a time. The first user is probably not a good measure, however the RAM change between 4 users and 5 users should give you good indication of the amount of memory consumed per session. Finally you need some indication of load - and this really depends on how popular the site will be. It's a big guess unless you have a captive userlist (ie people who have to use the site as part of their job). Personally I would make a conservative approximation (you never get as many users as you would like) and then a minimum and maximum values. This should give you some memory requirements, eg minimum load = 300mb, typical load = 500mb, maximum load = 1gb. You will need to do some maths to work out your required line speed, allowing for a typical 5 second response for the end user on a 256kbps connection, your server might require 1mbps to handle the load. At the end of the day there is a lot of guess work until the site is launched, marketed and being used regularly. If your estimates are too low you can always upgrade. If your estimates are too high then you can always add extra sites to the server. Cheers mc On 8 Nov 2005 at 15:16, Dave Newton wrote: > Ashish Kulkarni wrote: > > >Now there is another person who wants to host this > >application and he wants to know "How much heavy the > >application is" So how do i answer him, > > > "Eleven." > > Personally, I'd leave it at that, but some people want more. > > I'd ask him what he really wants to know; is he interested in traffic, > code, "comprehensibility" stats, etc. > > Or you could just say "It's pretty light," based on the size of the > codebase and low-ish traffic. > > Dave > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.362 / Virus Database: 267.12.8/162 - Release Date: 5/11/2005 > FOCUS Computing - web design Mob: 0415 24 26 24 [EMAIL PROTECTED] http://www.focus-computing.com.au -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.362 / Virus Database: 267.12.8/162 - Release Date: 5/11/2005 --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
