[OpenAFS] Re: Vos functions and clones and shadows

Adam Megacz megacz@cs.berkeley.edu
Tue, 26 Jun 2007 16:26:03 -0700

For the purposes below, does the backup need to be part of the volume
group?  Or does the CM just assume that a volume group encompasses the
RW and all of its ROs?

  - a

Jeffrey Altman <jaltman@secure-endpoints.com> writes:
> Adam Megacz wrote:
>> And does it also mean that the sole purpose of volume groups is to
>> know what volumes to get rid of when an RW is removed?
> The VL_GetEntryByName?() RPCs returns the IDs and server locations of
> all of the volumes in the requested group.  The Windows cache manager
> tracks all of the volumes by the group (as of 1.5.21).  It does not keep
> a separate entry for each volume.
> One of the reasons that the CM tracks the group is so that it can easily
> implement the automatic use of the RW volume when a .readonly volume is
> requested but doesn't exist.
> Other than knowledge of which volumes make up the group, the CM doesn't
> care what the volume IDs are or how they are allocated.
> Jeffrey Altman
> Secure Endpoints Inc.

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