Re:RE: MC/Serviceguard vs Sun Clusters

From: <dgoulet_at_vicr.com>
Date: Thu, 07 Feb 2002 17:30:02 -0800
Message-ID: <F001.004096C7.20020207141820@fatcity.com>

Walter,

Which contractor? The fool who disconnected the heartbeat cable or the fool who installed the ServiceGuard software in the first place? Actually someone should have seen the fallacy of the install the day before ServiceGuard went online. Seems that the HP representative after a 12 hour day of spinning drives to setup the backup server wanted to delete a directory off of the root filesystem where he had put some files that needed saving for the time being. Kind of like a backup directory. Well now that's a simple "rm -fr /backup" command, right??? He entered "root> rm -fr /". OOPPPPPPPS!!!

____________________Reply Separator____________________
Author: "Kirsch; Walter J (Northrop Grumman)" <walter.kirsch-eds_at_eds.com>
Date:       2/7/2002 1:53 PM

Talk about serendipity -- I hope you payed that disconnected contractor a bonus for debugging your failsafe setup?

-----Original Message-----
Sent: Thursday, February 07, 2002 9:00 AM To: Multiple recipients of list ORACLE-L

Rama,

We did the MC/ServiceGuard thing some years ago. Worked well, after our SA
rebuilt the servers from ground 0. Adding it on to an existing server is ok,
but somewhat unstable. One item to be VERY careful of. The heartbeat cable, in
our case a ethernet thin line, needs to be on a dedicated link, preferably a purchased vs. custom made cable, and protected from accidental disconnect. Ours
got disconnected by a contractor working in the computer room because "it was in
his way". The resulting reboot of the backup server and forcible takeover of
the disk farm absolutely destroyed the database. We had more file corruption
than I ever could have imagined. Consequently we abandoned ServiceGuard & are
going to standby databases instead.

Dick Goulet

____________________Reply Separator____________________
Author: "Rama Malladi" <rama_at_toyota.com>
Date:       2/6/2002 5:23 PM

Hi...
I am looking for inputs from anybody who has experience in both MC/Serviceguard (MC/S) as well as Sun cluster implementation. If a DBA/SA team has lots of experience in implementing MC/Serviceguard clusters on HP and trying to move to SunClusters for HA solution ...

What are the common things between MC/S and and Sun clusters (ex: about 5 minute fail-over time, fixed IP address, 2 or more nodes in a cluster, disk sharing etc..)
Any differences between these... What are the things to watch out for (assuming the team already knows in and out of MC/Serviceguard)

Thank you in advance...
Rama

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Author: Rama Malladi
INET: rama_at_toyota.com

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Author:
INET: dgoulet_at_vicr.com

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