Hello,
So we have NodeA (active) and NodeB (standby). When NodeA fails (say one of the
monitored processes dies and the others are killed and the node rebooted) will
the processes on NodeB start from scratch? I wonder about the transfer of state
information from A to B which I don't believe is possible and thus processes on
NodeB would look like newly started processes. If one has a webserver that
starts on NodeB it may not be such a big deal to start it fresh, but I am
thinking about the following scenario: NodeA plays back some mp3 file and about
50% into the song the process crashes and NodeB would have to continue playing
from that point forward. In this case the "resume" or "continue" behavior is
clearly preferred (required :) ). However, it seems unlikely that this will
happen without the application being aware of such scenarios (e.g. use
checkpoints). The entire HA mechanism is definitely oblivious of what happens
"above", at the app level.
Can anybody comment on this? Maybe pointers to literature I missed?
Thanks!!
Radu
____________________________________________________________________________________
Got a little couch potato?
Check out fun summer activities for kids.
http://search.yahoo.com/search?fr=oni_on_mail&p=summer+activities+for+kids&cs=bz
_______________________________________________
Linux-HA mailing list
[email protected]
http://lists.linux-ha.org/mailman/listinfo/linux-ha
See also: http://linux-ha.org/ReportingProblems
