One of my clients has three EC2 servers on the Amazon cloud, with several attached EBS devices:
server 1 and server 2 are ubuntu micro instances, and server 3, the main production box, is a ubuntu large instance.
I'm want to create a duplicate of server 3 but am wondering if there is an advantage of having 4 attached EBS devices as shown, or if it would be simpler / easier to do it with fewer attached devices.
I don't know too much of the history of these servers, so I'm looking for insight. I do know that server 3 runs programs that require
apache, mysql, oracle, java, solr and maybe a few other services.
If I launch a new Ubuntu Large instance I believe it only comes with 7.5 GB of storage - so if I need to store a large database I will need at least 1 other attached EBS device, because I don't think when using Ubuntu's images on EC2 you can increase the size of the main EBS. Is that correct?
And, if I add another EBS device to the instance, I will need to do things like change the path of where apps (like mySql and Oracle) store their data - right?
My apologies for having a somewhat broad question, but in a nutshell, I'd just like to know:
How should I set up additional EBS storage on an Amazon EC2 instance?