The heartbeat version in CVS has two new features:
warntime: heartbeats that come in later than this result in warnings
It is good to set warntime relatively low, and deadtime fairly
high on systems that undergo extreme load, so you can tell
how short you could safely set deadtime. This was suggested
by someone at my Atlanta talk last week.
stonith: when enabled, and equipped with proper hardware, this causes
the surviving machine to reset the "dead" machine. This is
necessary when doing shared disk filesystems. The only
currently supported hardware is the BayTech RPC series of
power controllers. These controllers have ethernet interfaces,
so, in effect, they also act as pseudo-quorum devices as well,
since if you lose ethernet communication, only the one still
communicating will actually survive. You still need a little
code to detect that you have external communication before
mounting a shared device.
-- Alan Robertson
alanr@suse.com
warntime: heartbeats that come in later than this result in warnings
It is good to set warntime relatively low, and deadtime fairly
high on systems that undergo extreme load, so you can tell
how short you could safely set deadtime. This was suggested
by someone at my Atlanta talk last week.
stonith: when enabled, and equipped with proper hardware, this causes
the surviving machine to reset the "dead" machine. This is
necessary when doing shared disk filesystems. The only
currently supported hardware is the BayTech RPC series of
power controllers. These controllers have ethernet interfaces,
so, in effect, they also act as pseudo-quorum devices as well,
since if you lose ethernet communication, only the one still
communicating will actually survive. You still need a little
code to detect that you have external communication before
mounting a shared device.
-- Alan Robertson
alanr@suse.com