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List:       veritas-ha
Subject:    RE: [Veritas-ha] Question on Oracle-RAC
From:       "Mark Schipper" <mschipper () lightsurf ! com>
Date:       2005-06-22 21:03:44
Message-ID: 200506222103.BUY30690 () mail ! lightsurf ! com
[Download RAW message or body]

It's HA folks......not IA (infinite availability), CA (continuous
availability) or even AA (where admins end up when they work for management
who thinks HA means "always up").

For those few instances when you have to take a full outage...HA gives you
the ability to choose when you are going down. Seems pretty cool to me. If
you want to keep your headaches to a minimum, take the time (eg. the outage)
to keep all nodes in sync from the firmware to OS to device drivers to VRTS
maintenance packs. Best way keep keep the surprises to a minimum.

Identical nodes are happy nodes...


-----Original Message-----
From: veritas-ha-admin@mailman.eng.auburn.edu
[mailto:veritas-ha-admin@mailman.eng.auburn.edu] On Behalf Of Jim Senicka
Sent: Wednesday, June 22, 2005 6:24 AM
To: Brown, Rodrick; Sehra, Kamal; veritas-ha@mailman.eng.auburn.edu
Subject: RE: [Veritas-ha] Question on Oracle-RAC

While your point is valid,
the difficulty is once you add in cluster file system, cluster volume
manager and RAC, the nodes are acting in lock step more as a single node.
At which point it becomes extremely hard to patch one node and have it still
a part of the collective..... 

-----Original Message-----
From: veritas-ha-admin@mailman.eng.auburn.edu
[mailto:veritas-ha-admin@mailman.eng.auburn.edu] On Behalf Of Brown, Rodrick
Sent: Wednesday, June 22, 2005 8:35 AM
To: Sehra, Kamal; veritas-ha@mailman.eng.auburn.edu
Subject: RE: [Veritas-ha] Question on Oracle-RAC

What would be the point of a cluster if you had to take down all nodes to
patch it? 

Most peopled tend to run clusters for the HA, well we do anyway, so usually
when systems need to be patched we failover apply patches, if everything
comes up clean do the same on each node sequentually. 

--
RB 


-----Original Message-----
From: veritas-ha-admin@mailman.eng.auburn.edu on behalf of Sehra, Kamal
Sent: Tue 6/21/2005 9:16 PM
To: veritas-ha@mailman.eng.auburn.edu
Subject: [Veritas-ha] Question on Oracle-RAC
 
I have many clusters that I support which are running VCS with OracleRAC
3.5 MP3 on Solaris 8 64bit.    I have always wondered  about while we
apply maintenance patches provided by SUN --should we apply one node at a
time or both nodes at same time. Normally cluster, we wud deploy SUN patches
on one node at a time and wait for few weeks before applying 2nd node. But
here because its CVM/CFS and also SUN/Veritas has recommended doing
so...that's how I have been doing it from over a year. However still some
people has different opinion about this.

What you guys think about this ? 


-Kamal Sehra
FISC UTS
* Office 603-791-8640
* Cell    617-590-9023 
Pager 1050876 ( 2 Way Skytel )
> Work request: http://servercentral.fmr.com/default.asp?ctg=uts
> 


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