Amazon EC2- many micro-instances vs single small/medium instance

Posted by shashankaholic on Server Fault See other posts from Server Fault or by shashankaholic
Published on 2012-06-07T09:04:38Z Indexed on 2012/08/29 15:40 UTC
Read the original article Hit count: 261

Filed under:

mysql

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amazon-ec2

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tomcat6

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openfire

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multiple-instances

I have a chat application using stack of Openfire, Tomcat6 and MySQL.

Currently, i have installed all these servers on single Linux micro-instance(613 MB memory). Even in low user base 10-20 i am encountering CPU overload which is quite obvious here.

As, i am new to Amazon EC2 can somebody suggest me how to scale up my architecture according to traffic use?

should i use separate micro instances for every app server(openfire,mysql,tomcat6)
should i use single small or medium instance for whole server stack.

Some factors in context:
high reliance on MYSQL
high memory usage due to file transfer
web-application interacting with other Amazon service like S3,SES

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