[Linux-cluster] replication

[David Siroky]

Olivier Crête píše v Pá 07. 07. 2006 v 13:06 -0400:
> On Fri, 2006-07-07 at 17:19 +0200, David Siroky wrote:
> > I didn't describe my plan very well.
> > 
> > Lets look at this scenario:
> > Now I have 1 server which is placed in a serverhousing company. Till now
> > every problem with service interruption was a connection problem in the
> > serverhousing company so the server (and its services) was sometimes
> > unreachable even if the server was in a good shape and running. So now I
> > would like to solve this by placing 3 servers in 3 serverhousing
> > companies geographicaly spreaded. In this way I can't use SAN.
> 
> Can't you just have a cron job that uses rsync to update the data in the
> 2 other servers from the master? 
> 
> 

This is asynchronous replication and it can cause data
inconsistency/corruption when connection between servers is broken.