Parrallels Plesk on AWS

[Arthur AKH]

Hi,

If I am using Parrallels Plesk Panel on AWS EC2 cents OS, does it work with load blancing? can we use combination with Amazon RDS and EBS ad SES?

 

[Faris Raouf]

Unfortunately, no.

Load balancing is more complex than it might appear. You need to have your databases constantly in sync, as well as all the rest of the contents of the filesystem (imagine two people logged in the Plesk on different instances, each making a change to the Plesk DB. How do you combine these changes? And what happens when someone makes a change in a database on one instance and another user needs to read the contents of the same database on another instance a millisecond later? Something needs to be in place to make sure the second user sees the data written by the first user even though it was milliseconds earlier on a different server).
Doing what you want is possible, but you need a lot of components in place and quite frankly it is so complex that I've not managed to get my head around everything.

Of course I am not really qualified to comment since I don't really understand the technology -- maybe it is easier than I think it is. Hopefully someone who does understand it and maybe has managed to get it working would like to offer some information?

You might want to look into PCS6 (which will not work on Amazon instances), which replicates data across multiple hardware nodes. Also check our Parallels Plesk Automation, which allows you to set up dedicated web, database, mail and DNS nodes. It may be easier to load-balance web nodes than web+database+everything else node.