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Performance

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George Nelzo Pereira
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Posted on 24/11/2016 12:04:51

Hi. Someone knows when is recommended to use a solution with NLB ?

And what is the maximum users or sessions we can have in one single solution at the same time?
I`m looking to one solution with 250.000 users to access the solution in the same day.
The solution will be very simple with 3 or 4 pages with a extranet login and one Data list with one form, but the amount of users at the same time can be the problem.


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Nicolai Pedersen
Posted on 24/11/2016 12:24:45
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Hi George

It depends - with your numbers it approximates to 500-1000 concurrent users (given that the users are distributed evenly over 24/12 hours). So that is possible if you 'code it right'.

It all boils down to

  • Number of http requests per visitor/pageview (how many images, css, js etc. are used). Or move them to a CDN
  • Do they log in? (Sesssions are heavy on the server)
  • Distribution of visitors during the day - what is the maximum amount of expected concurrent users. Are all 250.000 in one minute or during the entire day?
  • Sizing of the server - small servers can handle little traffic, large servers more traffic)
  • Settings in IIS (Default is 2000 concurrent requests including images etc. - that would be too little)

My recommendation would be

  • Create the site,
  • build the servers (one IIS and one SQL), at least 12 gb ram for web, 8 gb for SQL)
  • tweak IIS settings
  • Add CDN for static ressources
  • Let us stress test the site under load and see what numbers we can handle (http://engage.dynamicweb.com/services/stress-load-test)
  • Add web servers if needed

BR Nicolai

Votes for this answer: 1
 
George Nelzo Pereira
Posted on 25/11/2016 13:40:52
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Hi Nicolai.
Thanks for your reply.
I will try do this.
Thanks

 

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