Rich,
> BUT, I think that a tape will contain many aggregates,
... might ...
> AND, I think that the physical occupancy will go down when all the files of
> a particular aggregate are expired, even though other aggregates still
> have files in them.
True. But it happend to me to see volumes with 90% reclamation and
90% utilization at the same time. When reclaimed they turned up to have
only 10% of valid data.
Mauro, STM
> At 07:35 AM 10/11/99 -0500, you wrote:
> >Betsy,
> >
> >Picture how much space an aggregate takes up on a physical tape at time of
> >backup.
> >
> >(An aggregate being a collection of files).
> >
> > As files (data) expires within that aggregate the logical occupancy
> >decreases, however the physical space occupied by the aggregate is the same,
> >until the tape is reclaimed. Once it is reclaimed the aggregate is then
> >rebuilt and logical and physical occupany should be pretty much the same.
> >
> >At least that's the way it appears to me...
> >
> >Nathan
> >
> >
> >
> > -----Original Message-----
> > From: Moir,Betsy [SMTP:betsy.moir AT ABBOTT DOT COM]
> > Sent: Friday, October 08, 1999 8:04 PM
> > To: ADSM-L AT VM.MARIST DOT EDU
> > Subject: Re: Occupancy?
> >
> > So, after reading that, I can understand why the question was asked.
> >That
> > didn't clear up anything. Is a logical file the space defined for
> >storing a
> > file and a physical file the actual physical space being used for
> >that file?
> >
> >
> >
> >
> > ADSM-L AT VM.MARIST DOT EDU on 10/08/99 10:31:15 AM
> > Please respond to ADSM-L AT VM.MARIST DOT EDU @ INTERNET
> > To: ADSM-L AT VM.MARIST DOT EDU @ INTERNET
> > cc:
> > Subject: Re: Occupancy?
> >
> > Wanda:
> >
> > The following definitions are taken from the Glossary
> > of the ADSM V3R1 Sun Solaris Admin Reference:
> >
> > logical occupancy. The space required for the storage
> > of logical files in a storage pool. Because logical occu-pancy
> > does not include the unused space created when
> > logical files are deleted from aggregates, it may be less
> > than physical occupancy. See also physical file and
> > logical file.
> >
> > logical file. A client file stored in one or more server
> > storage pools, either by itself or as part of an aggregate
> > file. See also aggregate file and physical file.
> >
> > physical file. A file, stored in one or more storage
> > pools, consisting of either a single logical file, or a group
> > of logical files packaged together (an aggregate file).
> > See also aggregate file and logical file.
> >
> > physical occupancy. The occupancy of physical files
> > in a storage pool. This is the actual space required for
> > the storage of physical files, including the unused space
> > created when logical files are deleted from aggregates.
> > See also physical file, logical file, and logical occupancy.
> >
> >
> >
> >
> > At 10:41 AM 10/8/99 -0400, you wrote:
> > >In the OCCUPANCY SQL table there are two columns named
> >"physical_MB" and
> > >"logical_MB".
> > >Can sombody tell me the difference?
> > >
> > >Thanks.
> > >
> >
> >>************************************************************************
> > >Wanda Prather
> > >The Johns Hopkins Applied Physics Lab
> > >443-778-8769
> > >wanda_prather AT jhuapl DOT edu
> > >
> > >"Intelligence has much less practical application than you'd think"
> >-
> > >Scott Adams/Dilbert
> >
> >>************************************************************************
> > >
> > >
> >
> > Richard C. Dempsey email: dempsey AT kodak DOT com
> > Public Online Services pager: 716-975-3539
> > 11th Floor, Bldg 83, RL phone: 716-477-3457
> > Eastman Kodak Company fax: 716-722-3885
> > Rochester, NY 14650-2203
> >
> >
>
> Richard C. Dempsey email: dempsey AT kodak DOT com
> Public Online Services pager: 716-975-3539
> 11th Floor, Bldg 83, RL phone: 716-477-3457
> Eastman Kodak Company fax: 716-722-3885
> Rochester, NY 14650-2203
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