Digimer writes: > On 11/14/2011 09:41 AM, nux at li.nux.ro wrote: >> >> Hi, >> >> I'm looking for some recommendations. I need to have some sort of high >> availability for a set of php & mysql web sites, they must be hosted on 2 >> servers, in separate data centres and obviously on differrent IPs. >> I can't use a load balancer because that will introduce a single point of >> failure making the "distributed setup" useless. I was thinking some sort of >> drbd/glusterfs/mysql-master-master replication and figure out how to make >> the dns system responsible with the fail over. >> Am I going too far with this? >> >> Thanks. > > WAN/Stretch clustering suffers most for network latency. If you need to > keep the data in sync across both nodes, using DRBD will limit your hard > drives, effectively, to the speed and latency of the link between your > nodes at the different DCs. This is rarely usable. > > Stop by #linux-cluster and/or #drbd, I know there are folks there from > Linbit and Hestaxo who could help you, but you're going to be facing > rather expensive technical challenges. :) Hello Digimer, Thank you, however I decided to go for a less exotic setup and use a more passive way of sync (probably rsync and mysql replication) and I'll do the high availability part from DNS (yes, I know there are issues with this solution as well). Thanks again. -- Nux! www.nux.ro