-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Jason Voorhees wrote:
I'm trying to improve my understanding about heartbeat communication,
failover behavior and some stuffs, so I have some questions:
1. What do I use bcast/ucast/mcast directive for? Is it suposed that
heartbeat nodes communicate each other trough interfaces asigned in
bcast/ucast/mcast?
bcast is noisier
ucast and mcast is quieter because it's directed to only intended node.
2. What interfaces should I use in bcast/ucast/mcast? Do I need to use
more than a single interface? I think using only eth2 it would be
enough... is it?
In your scenario, you can use all interface for the bcast, or, if you
want, you can just use the eth2.
3. What do I use ping directive for? I'm using ping pointing to the
router IP address so I can know when eth0 fails... is that right?
Correct. But, you need to configure resources too if you use HA v2.
4. If I use ping to the router IP address to know when eth0 fails... How
can I know when eth2 fails? I know it's not recommendable to use the
other node IP address as a ping node.
- From the heartbeat bcast.
5. Should I use all eth0, eth1 and eth2 with bcast/ucast/mcast
directive? I think if eth2 fails then both nodes could still communicate
trough eth0 or eth1... is that right?
Although eth0 and eth1 can be used as heartbeat medium, the direct cross
cable is better, even better use a null modem cable through serial port.
Try to eliminate a single point of failure.
5. What communication method should I use between bcast, ucast and
mcast? I was reading in mailing list archives that bcast sometimes
causes floods, delays or similar problems.
In today's gigabit network, I don't think bcast will be harmful,
especially if you dedicate eth2 for it.
I hope someone can help me because documentation on linux-ha.org is not
very clear in some cases, and finding answers to my questions in mailing
list archives is not always easy. I'm just trying to understand better
the heartbeat behavior.
Are you kidding? Linux HA docs is one of the best opensource project
docs that I've ever encountered. Salute to the docs team!
- --
Fajar Priyanto | Reg'd Linux User #327841 | Linux tutorial
http://linux2.arinet.org
13:10:54 up 5:02, 2.6.24-18-generic GNU/Linux
Let's use OpenOffice. http://www.openoffice.org
The real challenge of teaching is getting your students motivated to learn.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org
iD8DBQFIlovK8TneBL/L6RoRAqJeAJ9Gxlyxyd1Ieo5+Nih6ERUyby3ssQCfd6Q2
r6V91V1EFHgooH5SkNdt97o=
=G1YE
-----END PGP SIGNATURE-----
_______________________________________________
Linux-HA mailing list
[email protected]
http://lists.linux-ha.org/mailman/listinfo/linux-ha
See also: http://linux-ha.org/ReportingProblems
