Amazon EC2 with or without EBS?

Question

Continued reading on AWS. Amazon Large Instances comes with 850 GB of local storage. However, I read in the case of switching to another resource, and we want to include another instance, can we just install it on EBS and start working correctly? This will mean that we must configure and store it on the EBS volume in order to take advantage of this feature. Does this mean that with local storage, for example, if the data is stored in local mode, we will not be able to do this? EBS is billed separately; large local storage of 850 GB might not be so profitable? Is EBS usually for Webserver data or primary for MySQL for persistent data?

Anyone with AWS experience can be good inside? This will mean that most of the cases for which I pay must buy EBS in order to use the switch option?

Answer 1

I recommend that you start using EBS completely. This means running AMI boot AMI and placing your data (web, database, etc.) on a separate EBS volume (recommended) or even on the root EBS volume. Here's an article I wrote that describes more details on why I feel this way for beginners:

http://alestic.com/2012/01/ec2-ebs-boot-recommended

The specified 850 GB local storage is ephemeral, which means that it can be lost forever if you stop your instance, terminate your instance, or if the instance fails. It might be useful to use for things like large / tmp, but I recommend using ephemeral storage for anything of value.

We also note that 850 GB is not in the same partition, all of them are not tied to the default instance and by default are not fully formatted by the file system.