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POHow to make EC2 instance call another instance?
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  1. POHow to make EC2 instance call another instance?
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    copied!<p>I have two EC2 instances. I want that if one finish a job, it will sign the other one to do other stuff.<br> So, how to make the communication? I don't want to use CURL.. coz it seems like expensive. I think AWS should have some simple solution but I still can't find relevant help in the documentation. </p> <p>:(</p> <p>also, how to send data between two instances without giong through SSH in a fast way? I know ssh can be done. but it seems slow. once again, any tool that EC2 provide to do that? </p> <hr> <p>Actually, I need two methods:</p> <p>1) Instance A tells Instance B to grab the data from Instance A.</p> <ul> <li>This is answered by Adrian that I can use SQS. I will try that. </li> </ul> <p>2) Once Instance B get the signal, then the data (EBS) data in Instance A needs to transfer to Instance B. The amount of data can be big even I zip it. It is around 50 MB. And I need Instance B to get the data fast so that Instance B will have enough time to process the data before next interval comes in. </p> <p>So, I am thinking of either these methods:</p> <p>a) Instance A has the data dump from DB, upload to S3. Then signal Instance B. Instance B gets the data from S3. </p> <p>b) Instance A has the data dump from DB. Then signal Instance B. Instance B establish SSH (or any connection) to Instance A and grabs the data.</p> <p>The data may need to be stored permanently but it is not a concern at this moment. It is mainly for Instance B to process. </p> <p>This is a simple scenario. I'm thinking of what if I scale it with multiple instances, what the proper approach is. :)</p> <p>Thanks. </p>
 

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