I’d ask for some more detail. 5000 users/day could be as little as 104 concurrent sessions (5000/24 hours @ 30 minutes/session), or as high as 625 concurrent sessions (5000/8 hours @ 60 minutes/session. Or it be even higher if that 5000 users all comes in during a single 1 hour period.
300 records a session – this is reading 300 records? Or inserting 300 records? How much data in each of these records? Reading 300 records in a 30 minute session doesn’t seem like much (but I suppose it depends what a record means) How many concurrent requests are you seeing? Or requests/second? If a session is only a single page request that’s very different to a session comprising 1000 page requests. When you are seeing peak load, what resource usage increases are you seeing? Where do you think your bottleneck will be? CPU? Memory? Network bandwidth? Disk I/O? etc Would one of the cloud providers (Amazon etc) be of use? Cheers Ken From: [email protected] [mailto:[email protected]] On Behalf Of Rob Andrew Sent: Friday, 24 February 2012 6:07 PM To: 'ozDotNet' Subject: RE: Clouding an application David, Sure – the target numbers are currently just modelling numbers, as we have an existing application that supports about 5 thousand users at peak times. Running this on a standard web hosting plan is fine at the moment, but we are starting to see user numbers peak during certain times of the month. So we normally go from about 100 individual users per day to just over 5 thousand per day over the course of a month. Sessions last for about 30-60 min each. Data wise we are relatively heavy with each user generating about 300 or so records per session. We’re looking to take it to O/S markets and the hope is that the number will expand at least several fold so we are looking for scalability options that scale with our requirements (rather than buying 5 servers say and using them 5% of the time). Rob From: [email protected]<mailto:[email protected]> [mailto:[email protected]]<mailto:[mailto:[email protected]]> On Behalf Of David Connors Sent: Friday, 24 February 2012 7:50 PM To: ozDotNet Subject: Re: Clouding an application On Fri, Feb 24, 2012 at 2:59 PM, Rob Andrew <[email protected]<mailto:[email protected]>> wrote: * High numbers of adhoc/recurrent users * Highly variable number of users per period * Relatively high data requirements per user * "Peaky" usage profile for users (application is used for a day a week, but often in bursts by groups of users) etc Can you put some numbers around this? What is your actual peak load? Can you tell us something about the complexity of the data access? -- David Connors | [email protected]<mailto:[email protected]> | www.codify.com<http://www.codify.com> Codify Pty Ltd Phone: +61 (7) 3210 6268 | Facsimile: +61 (7) 3210 6269 | Mobile: +61 417 189 363 V-Card: https://www.codify.com/cards/davidconnors Address Info: https://www.codify.com/contact
