[CentOS] file system replication

On 10/9/2014 8:19 PM, Micky wrote:
> Most people forget that DRDB is a 'clustered' storage that creates a new
> block device on top of existing block devices, over the network.
>
> There are issues like SPLIT BRAIN and a possible data inconsistency, should
> there be multiple network timeouts, congestions (since it is all network
> based) etc. This may not be the best solution for your problem!

those are potential issues with ANY high availability clustering 
solution that need to be carefully engineered around.   HA clusters 
commonly use fencing technology to prevent split brain, dedicated 
network adapters just for replication, and redundant connections for 
status monitoring, etc.



-- 
john r pierce                                      37N 122W
somewhere on the middle of the left coast