[DRBD-user] DRBD over WAN Advisable?

Robinson, Eric eric.robinson at psmnv.com
Thu Mar 31 19:25:51 CEST 2011

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


Greetings! We have a few Corosync+PaceMaker+DRBD clusters and a couple
older Heartbeat+DRBD clusters. Our infrastructure is currently located
in a single facility. We have the opportunity to establish a DR site in
another data center over a high bandwidth connection (2-4Gbps). I am
thinking of moving the standby cluster nodes to the secondary data
center. One thing that concerns me is the greater possibility of
split-brain scenarios. Currently our clusters communicate heartbeat
through multiple paths: 1. The primary LAN link that users communicate
through; 2. The DRBD link; 3. A dedicated cluster communication LAN. If
we move the standby cluster nodes to the secondary facility, there will
no longer be redundancy on the heartbeat links. Everything will go
through the inter-data-center connection. This concept is a little
worrisome. Should I be very concerned? Is there a way to minimize the
risk of split-brain over WAN?
 

--Eric

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 


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