RMAN: invalid size at "list backup;"

Hi,
when I exec a "list backup;" with RMAN the shown Size value of a backup
piece are not equal to file size of the backup piece if the filesystem.
Sometimes there are differences up to 50%.
I found no reason why both values differ, as "Size" is sometomes
smaller and otherwise bigger than the file size.
Can you help me ???
greets,
Rainer

On 17 Aug 2005 07:47:17 -0700, "rhartwig" <rainer.hartwig@gmail.com>
wrote:

>Hi,
>when I exec a "list backup;" with RMAN the shown Size value of a backup
>piece are not equal to file size of the backup piece if the filesystem.
>Sometimes there are differences up to 50%.
>I found no reason why both values differ, as "Size" is sometomes
>smaller and otherwise bigger than the file size.
>Can you help me ???
>greets,
>Rainer
>

Not until you give platform and version.

And list an elaborate example of the mentioned difference with it. If
the backup pieces are 1M, differences are expected. If they differ 50%
on 100G pieces, it may become interesting.


- Kenneth Koenraadt

Kenneth wrote:
> On 17 Aug 2005 07:47:17 -0700, "rhartwig" <rainer.hartwig@gmail.com>
> wrote:
>
> >Hi,
> >when I exec a "list backup;" with RMAN the shown Size value of a backup
> >piece are not equal to file size of the backup piece if the filesystem.
> >Sometimes there are differences up to 50%.
> >I found no reason why both values differ, as "Size" is sometomes
> >smaller and otherwise bigger than the file size.
> >Can you help me ???
> >greets,
> >Rainer
> >
>
> Not until you give platform and version.
>
> And list an elaborate example of the mentioned difference with it. If
> the backup pieces are 1M, differences are expected. If they differ 50%
> on 100G pieces, it may become interesting.
>
>
> - Kenneth Koenraadt

HI Kenneth,

two examples:

while list abckup shows:
BS Key Size Device Type Elapsed Time Completion Time
------- ---------- ----------- ------------ --------------------
34331 319M DISK 00:03:20 11-AUG-2005:04:13:42
BP Key: 34344 Status: AVAILABLE Tag: TAG20050811T041021
Piece Name:
/db-backup/backup/data4/pinsight.afxpq008/AL_pinsight_566021422_c1_s34970_p1.s.la.bck


BS Key Size Device Type Elapsed Time Completion Time
------- ---------- ----------- ------------ --------------------
34330 278M DISK 00:03:05 11-AUG-2005:04:13:27
BP Key: 34343 Status: AVAILABLE Tag: TAG20050811T041021
Piece Name:
/db-backup/backup/data2/pinsight.afxpq008/AL_pinsight_566021422_c1_s34972_p1.s.la.bck



ls -l shows:

-rw-r----- 1 oracle osdba 335526912 Aug 11 04:13
AL_pinsight_566021422_c1_s34970_p1.s.la.bck
-rw-r----- 1 oracle osdba 291929088 Aug 11 04:13
AL_pinsight_566021422_c1_s34972_p1.s.la.bck



version: 9.2.0.4

rhartwig wrote:
> HI Kenneth,
>
> two examples:
>
> while list abckup shows:
> BS Key Size Device Type Elapsed Time Completion Time
> ------- ---------- ----------- ------------ --------------------
> 34331 319M DISK 00:03:20 11-AUG-2005:04:13:42
> BP Key: 34344 Status: AVAILABLE Tag: TAG20050811T041021
> Piece Name:
> /db-backup/backup/data4/pinsight.afxpq008/AL_pinsight_566021422_c1_s34970_p1.s.la.bck
>
>
> BS Key Size Device Type Elapsed Time Completion Time
> ------- ---------- ----------- ------------ --------------------
> 34330 278M DISK 00:03:05 11-AUG-2005:04:13:27
> BP Key: 34343 Status: AVAILABLE Tag: TAG20050811T041021
> Piece Name:
> /db-backup/backup/data2/pinsight.afxpq008/AL_pinsight_566021422_c1_s34972_p1.s.la.bck
>
>
>
> ls -l shows:
>
> -rw-r----- 1 oracle osdba 335526912 Aug 11 04:13
> AL_pinsight_566021422_c1_s34970_p1.s.la.bck
> -rw-r----- 1 oracle osdba 291929088 Aug 11 04:13
> AL_pinsight_566021422_c1_s34972_p1.s.la.bck
>
>
>
> version: 9.2.0.4
>

Time to polish up the good ole' calculator, isn't it?

How much bytes is one KB, how much bytes is one MB?

But to be fair, I believe the correct term now is MiB,
so there is actually room for confusion.

Cheers,
Holger

>
> Time to polish up the good ole' calculator, isn't it?
>
> How much bytes is one KB, how much bytes is one MB?
>
> But to be fair, I believe the correct term now is MiB,
> so there is actually room for confusion.

Eh? How many byte in a MiB, then? 1,000,000?

And to the OP; the sizes are not 50% off; there are truncated.
If you still believe that 1 MB holds 1024 kB, and 1 kB is 1024byte,
that is.
--
Regards,
Frank van Bortel

Top-posting is one way to shut me up...

Frank van Bortel wrote:
>>Time to polish up the good ole' calculator, isn't it?
>>
>>How much bytes is one KB, how much bytes is one MB?
>>
>>But to be fair, I believe the correct term now is MiB,
>>so there is actually room for confusion.
>
>
> Eh? How many byte in a MiB, then? 1,000,000?
>
> And to the OP; the sizes are not 50% off; there are truncated.
> If you still believe that 1 MB holds 1024 kB, and 1 kB is 1024byte,
> that is.

Google for Mebibyte. I couldn't believe it when I first saw it, but
there it is...

http://mathworld.wolfram.com/Mebibyte.html

Cheers
Holger