07-20-2012 07:05 AM
Hi,
I am trying to configure SFRAC on Windows 2008 R2. I didn't find a solution of SFRAC for windows. I know that SFWHA is active/passive. But SFRAC is active/active, and it uses CVM rather than VxVm. I wonder if there is anyway can make the Oracle DB and shared disks active/active on Windows? Thanks a lot.
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07-20-2012 07:21 AM
I don't think this is possible. According to post https://www-secure.symantec.com/connect/forums/multiple-luns-disk-group the last comment by jdangelo_symc says
Support for Multinode Disk Group Access was added to SFW 6.0. This could be categorized as CVM for Windows (Not CFS however).
However, looking at SFW release notes this says:
A new mode, Deported Read-Only, is added to the existing dynamic disk groupentity. In this mode, a disk group is imported in a Read-Only mode on all thepassive nodes. The disk group configuration on the active node is automaticallyreflected on the passive nodes. During failover, instead of a complete diskgroup deport and Read/Write import, only a mode change occurs on the passivenode.
07-20-2012 07:21 AM
I don't think this is possible. According to post https://www-secure.symantec.com/connect/forums/multiple-luns-disk-group the last comment by jdangelo_symc says
Support for Multinode Disk Group Access was added to SFW 6.0. This could be categorized as CVM for Windows (Not CFS however).
However, looking at SFW release notes this says:
A new mode, Deported Read-Only, is added to the existing dynamic disk groupentity. In this mode, a disk group is imported in a Read-Only mode on all thepassive nodes. The disk group configuration on the active node is automaticallyreflected on the passive nodes. During failover, instead of a complete diskgroup deport and Read/Write import, only a mode change occurs on the passivenode.
07-20-2012 09:56 AM
Thanks, Mike. As I know, VCS is also active-passive. If I put RAC under VCS control in Windows, could it become active-active?
I thought VCS and SFW are almost the same, becuase configuring VCS for windows is a part of SFW configuration. What is difference between VCS control and SF control?
07-20-2012 12:06 PM
VCS can be active-active - this is called a parallel service group and this is no problem in Windows.
VCS provides redundancy of servers so fails services to a different server if server or processes die and SFW provides redundancy of storage with host based mirroring and dynamic multipathing. SFW also provides other features such as extending filesystem online and snapshots. Unlike UNIX SFW does not provide a filesystem (vxfs in UNIX) - just volume Management (VxVM).
SFW and VCS are independent and each can be used without the other.
Mike