BUT, I think that a tape will contain many aggregates,
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.
Rich
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
|
