EMC = 170 odd Gig disks. Coordinator needs 3 10mb LUNS. I waste more space than that on storing bad jokes from email......
I/O fencing is best possible config to prevent split brain. Low Priority is a best practice, but is still not bulletproof. -----Original Message----- From: Steven Sim [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 19, 2006 11:18 AM To: Jim Senicka; veritas-ha@mailman.eng.auburn.edu Subject: low priority heartbeat vs I/O Fencing Hello Gurus; Firstly, I wish to thank James Senicka of Symantec for his wonderfully fast and very technically accurate replies. I wish all other product vendors were so efficient. Support like this is one reason why I will continue to push VCS as a clustering solution. I am currently trying to convince a customer to implement I/0 Fencing with three SAN based co-ordinator disks. I've told him 3 are required (minimum) and they cannot be used for data. At which point he threw a look at me and asked me whether I was aware of how much per byte his EMC was costing him. So....some bright spark suggested a low priority heartbeat. Which I was going to implement anyway, with or without I/O Fencing. My question is; Is a low priority heartbeat sufficient for I/O Fencing? If so, why the strong recommendation for I/O Fencing with three co-ordinator disks? I have been telling people that a low priority heartbeat is not sufficient protection against split brain scenarios. Could you guys comment? Warmest Regards Steven Sim Fujitsu Asia Pte. Ltd. _____________________________________________________ This e-mail is confidential and may also be privileged. If you are not the intended recipient, please notify us immediately. You should not copy or use it for any purpose, nor disclose its contents to any other person. Opinions, conclusions and other information in this message that do not relate to the official business of my firm shall be understood as neither given nor endorsed by it. _______________________________________________ Veritas-ha maillist - Veritas-ha@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-ha
