AdvFS freeze / thaw for doing snapshots?

From: Greg Freemyer (freemyer@NorcrossGroup.com)
Date: Thu May 02 2002 - 11:22:58 EDT

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Managers,

I just saw a marketing presentation about Tru64 / SANs.

One of the slides read:

====
   Gaining Productivity with SAN Initiated Backup
         * Enterprise Volume Manager V2
            - Full support for Tru64 UNIX and TruCluster Server V5 for controller-based snapshot/clone generation
                    * AdvFS provides Freeze/Thaw to enable consistent clone or snapshot
                    * LSM supports cloned volumes
====

Does anyone know what they are talking about with "AdvFS provides Freeze/Thaw ...."

Is it useful in a standalone server, or only with a cluster where you are running the CFS.

Are there command line tools available to invoke this behavior?

If not, a C-callable API?

Is this only available when you buy EVM V2, or is provided one of the Tru64, TruClusters, AdvFS licenses?

PS: I am familiar with quiesing an application prior to making a snapshot, but this sounds like something that may be needed in addition to that in a CFS environment with direct_io in use.

Thanks
Greg Freemyer
Internet Engineer
Deployment and Integration Specialist
Compaq ASE - Tru64
Compaq Master ASE - SAN Architect
The Norcross Group
www.NorcrossGroup.com

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