Re: Clouding an application
On Fri, Feb 24, 2012 at 2:59 PM, Rob Andrew rand...@voyageconnect.comwrote: * 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* | da...@codify.com | 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
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: ozdotnet-boun...@ozdotnet.com [mailto:ozdotnet-boun...@ozdotnet.com] 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 rand...@voyageconnect.com 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 | mailto:da...@codify.com da...@codify.com | http://www.codify.com 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 https://www.codify.com/cards/davidconnors Address Info: https://www.codify.com/contact https://www.codify.com/contact
RE: Clouding an application
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: ozdotnet-boun...@ozdotnet.com [mailto:ozdotnet-boun...@ozdotnet.com] 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: ozdotnet-boun...@ozdotnet.commailto:ozdotnet-boun...@ozdotnet.com [mailto:ozdotnet-boun...@ozdotnet.com]mailto:[mailto:ozdotnet-boun...@ozdotnet.com] 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 rand...@voyageconnect.commailto:rand...@voyageconnect.com 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 | da...@codify.commailto:da...@codify.com | www.codify.comhttp://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
Clouding an application
Hi All,I've been asked to look into creating an application that may well work well in the cloud;* 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)etcWe are looking at ways to both develop and host this application - it is currently an asp.net application with sql backend, but looking to move to support more platforms (RESTful services, etc).As such, I am wondering whether anyone has any comments on using the various cloud services available? What is available, how are they used, cost/reliability/technical trade offs?Thanks,Rob
