Cluster management using Unison?
I just want an opinion. I'm going to be setting up a 4 server cluster for a big webserver. My first idea was to use "Unison" to sync all the servers together. My only question is that, if someone uploads an image via php to, let's say, server1 and based on the fact that unison would run every minute via a crontab, I can assume that this image won't be available on server 4 until a maximum of 120 seconds (2 mins).
In short, I can see how that could be a problem. Is there an existing tool out there that would work like unison but maybe as a daemon or something like that?
Thanks a lot !
