[DRBD-user] DRBD9: full-mesh and managed resources

Veit Wahlich cru at ircnet.de
Fri Aug 19 11:24:42 CEST 2016

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

Hi Dan,

Am Donnerstag, den 18.08.2016, 10:33 -0600 schrieb dan:
> Simplest solution here is to overbuild.  If you are going to do a
> 3-node 'full-mesh' then you should consider 10G ethernet (a melanox w/
> cables on ebay is about US$20 w/ cables!).  Then you just enable STP
> on all the bridges and let it be.  If you are taking 2 hops, that
> should still be well over the transfer rates you need for such a small
> cluster and STP will eventually work itself out.

I agree that it would work fine even when not in optimal state.
But my least-hop consideration was more about latency and unexpected CPU
overhead for bridging and not simply trusting the system to return to
the optimal state automatically.

At least for my own applications, I need to know, not to trust. Thus I
suggest to monitor the state.

Best regards,
// Veit

More information about the drbd-user mailing list