On Thu, Oct 9, 2014 at 11:43 PM, John R Pierce <pierce@xxxxxxxxxxxx> 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.
>
And you still need backups. Other things besides hardware failures
can wipe your data and with mirrors/clusters, software or operator
errors will take all the copies at once.
--
Les Mikesell
lesmikesell@xxxxxxxxx
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