Re: clustered MD

Goldwyn Rodrigues
2015-06-10T14:00:00Z

On 06/10/2015 03:00 AM, Richard Weinberger wrote:
> On Wed, Jun 10, 2015 at 5:33 AM, Goldwyn Rodrigues <rgoldwyn@suse.com> wrote:
>> David Lang has already responded: The idea is to use a RAID device
>> (currently only level 1 mirroring is supported) with multiple nodes of the
>> cluster.
>>
>> Here is a description on how to use it:
>> http://marc.info/?l=linux-raid&m=141935561418770&w=2
>
> Sorry if this is a stupid question, but how does this compare to DRBD?
>

No, it is not.

DRBD is for local devices synced over the network. Cluster-md is for
shared devices such as SAN, so all syncs happen over the FC.
DRBD works for two nodes (until recently), cluster-md works for multiple
nodes.

--
Goldwyn