Re: Move from Veritas to ASM
- From: "Alex Gorbachev" <gorbyx@xxxxxxxxx>
- To: fairlie_r@xxxxxxxxx
- Date: Fri, 16 Mar 2007 22:23:23 -0500
Fairlie,
Veritas Custer Server is the foundation for Veritas Cluster File
System and Veritas Cluster Volume Manager. VCS provides basic cluster
services for VxCFS and VxCVM.
It's same like Oracle 10g RAC (with ASM or without) database cannot
exist without CRS.
Running Veritas CFS and Oracle RAC on the same server will require
coexistence of both VCS and CRS. Normal setup is to integrate CRS with
VCS so that CRS sits on top of VCS and uses its cluster services.
It's possible to install CRS so that it's not aware of third-party
clusterware (tweaking installation process) but in practice it's
hardly justifiable as two clusterwares may take two different
decisions at some point leading to cluster outage and possibly data
corruption.
Now back to ASM - whether CRS is integrated with VCS or not, ASM can
use disks that are VxVM volumes or LUNs directly or multipathing
devices. So you can have CRS installed on top of VCS and ASM using
LUNs directly - and that's what Gopal said I think.
Cheers,
Alex
On 3/16/07, fairlie rego <fairlie_r@xxxxxxxxx> wrote:
It is not that ASM will sit on top of Veritas volumes but side by side on
separate volumes.Also I have been made to understand (by Symantec/Veritas)
that we cannot remove the Veritas ClusterWare from SFRAC and keep Veritas
Clustered File System. We either have the whole stack or none of it. Your
statement
"There are lot of people using ASM with Veritas Cluster but not on
VxFS" seems to contradict them.
--
Best regards,
Alex Gorbachev
http://www.oracloid.com
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