Alex Strachan schrieb:
-----Original Message-----
From: [email protected] [mailto:linux-ha-
[email protected]] On Behalf Of Hell, Robert
Sent: Thursday, 22 January 2009 9:33 PM
To: [email protected]
Subject: [Linux-HA] Two-node clusters in split-sites
Hi,
we are planning to run multiple two-node clusters (with different
functions: database cluster, samba cluster, ...) in two different sites
with a fast, but unreliable network connections. All cluster nodes
replicate data with drbd.
I'm specially afraid of split-brain in this scenario because reliable
fencing is not possible in this split-site situation.
Definitely get dopd working with DRBD/HA. On loss of DRBD connectivity the
secondary node will be marked as 'outdated', this will stop HA from
promoting it to primary which could happen in a split brain scenario.
Hi,
dopd would not help if the link between the two sites is not reliable.
Split site -> No heartbeat comm -> No dopd.
Michael.
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