[ec2-beta] ec2 concepts and understanding
Jason Morehouse
jm at onisland.ca
Mon Mar 30 21:09:14 BST 2009
Is there an easy way to build a custom AIM from a running instance?
Darryl wrote:
> On Mon, Mar 30, 2009 at 2:57 AM, Jim Cheetham <jim at inode.co.nz> wrote:
>
>> On Mon, Mar 30, 2009 at 9:28 AM, Darryl <smartssa at gmail.com> wrote:
>>
>>> I'm just wondering about how persistent these instances are supposed to be
>>> on the EC2 cloud.
>>>
>> An AMI is a read-only "image" of a machine. In itself it doesn't do
>> anything, and doesn't run. It's just the equivalent of files on a
>> disk.
>>
>> An 'instance' is a running virtual machine. An instance starts with an
>> AMI, and the equivalent of being "switched on" and booted from disk.
>>
>> An instance lives in EC2 memory only. There is no permanent storage
>> associated with it, unless you configure EBS or S3 specifically for
>> it. The filesystems that you see in an instance are virtual; they will
>> still be there if you reboot your instance, but once you stop it,
>> Amazon releases the whole associated memory, and the instance is lost.
>>
>
> Thank you Jim, that makes the whole scenario clear.
>
> Now I have an idea as to how to use this thing.
>
> --
> ~ Darryl ~ smartssa at gmail.com
> ~ http://darrylclarke.com
>
>
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