[DRBD-user] 3 or more nodes in Active

Martin Gombac martin at isg.si
Thu Oct 23 10:01:42 CEST 2008

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

On 2008.10.22, at 19:46, Lars Ellenberg wrote:

> On Wed, Oct 22, 2008 at 03:46:58PM +0200, Martin Gombac wrote:
>> Hi,
>> i'm planing ad server cluster with OpenX. I will have (at least) two
>> nodes with Active/Active OCFS or GFS for shared storage on top of  
>> LVM.
>> I wonder if it is possible to "extend"/duplicate DRBD to third or  
>> fourth
>> node later on, if the need for increased capacity is shown, so i can
>> simply add just another node to the cluster.
>> By extend i don't mean to add more disk space, just to have another
>> Active mirror.
> it is probably more suitable and less complex to use a Active/Standby
> drbd + iscsi-target cluster as SAN replacement, and import it on your
> scale-out cluster file system nodes.
> double check whether a drbd + nfs cluster is "good enough" for your
> scenario, as it usually performs better than cluster file systems on
> iscsi.

Thank you for your reply Lars.
In case i want to add more nodes i will use NFSv4 and its internal  
fail-over capability.

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