-----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
