2008-04-15 01:30:02
Keeping the files on multiple machines synchronized seems to be a recurring problem for many computer users. Until I discovered Unison (http://www.cis.upenn.edu/~bcpierce/unison/) I never really had a completely satisfactory solution. What we'd like to be able to do is efficiently keep two or more servers completely synchronized with each other no matter what gets changed on any of the servers. In the simplest case, we have a production server and a backup server that we need to keep in sync. We might have a cluster of servers used in a load balancing configuration. In the worst case, we might have a group of computers where changes are occurring on any or all of the devices. Consider the case where we have a computer at the office, a laptop, and a work computer at home. We want to be able to work from any computer at any time. 

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