[DRBD-user] Two NFS servers in passive-active

Alex Dean alex at crackpot.org
Mon Apr 5 15:52:21 CEST 2010

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

On Apr 5, 2010, at 5:16 AM, Olivier Le Cam wrote:

> Hi -
> I have a setup with one NFS server over a couple of DRBD servers in  
> active-passive mode. It is running just fine!
> Now I would like is to have a second NFS server also in passive- 
> active but on the opposite DRBD server.
>  - node1: NFS server exporting /data1 (passive-active)
>  - node2: NFS server exporting /data2 (passive-active)
>  - if one node fails, the other one would then take over and export  
> both shares (fail-over).
> As you can imagine I am concerned about maximizing resources usage  
> taking advantage of having two servers.

HA means redundant hardware.  Full utilization of all hardware  
(including your secondary nodes) means you don't really have HA.

Can a single server handle the load of serving both shares at an  
acceptable level of performance?  If the answer is yes, why not just  
put them on your current single primary?  If the answer is no, you  
could setting yourself up for problems.

Maybe you could add a third server, which is usually the secondary for  
both of your primary NFS shares?  Then you could survive the loss of 1  
of your primaries with no impact to performance, but without needing  
to add an entirely new 2-node cluster.  Just an idea if your current  
primary, in the case your current primary couldn't serve both shares  

> Does someone have some experience in such setup? How to have two NFS  
> instances running on the same node (both on different IPs)? TBH, I  
> don't know if this is even possible thougth...
> PS: I don't want to use some ClusterFS because I don't think I can  
> expect better performance due to overhead, compared to a single EXT3  
> server.
> Thanks in anticipation for sharing experiences/pointers.
> Best regards,
> -- 
> Olivier Le Cam
> Département des Technologies de l'Information et de la Communication
> CRDP de l'académie de Versailles
> _______________________________________________
> drbd-user mailing list
> drbd-user at lists.linbit.com
> http://lists.linbit.com/mailman/listinfo/drbd-user

-------------- next part --------------
A non-text attachment was scrubbed...
Name: PGP.sig
Type: application/pgp-signature
Size: 194 bytes
Desc: This is a digitally signed message part
URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20100405/5a41221a/attachment.pgp>

More information about the drbd-user mailing list