Re: Fw: Domino 8 compression

[Charles Wilt <charles.wilt@xxxxxxxxx>]

Rob,

Since the bulk of the data is already compressed, you might want to
make sure that the save isn't trying to compress it again; as that
would waste time.

Charles

On Tue, Jun 30, 2009 at 10:37 AM, <rob@xxxxxxxxx> wrote:
> Let's see if I get an answer on the midrange l list...
>
> I have several domino servers on this one lpar.  One of the Domino servers
> is saved with it's own save.  (It's quite significant.)
>
> I did two changes:
> 1 - Used some nice Domino 8.0 (not the 8.5 DAOS stuff yet) compression
> that freed up 200GB or just under three 70gb disk drives.
> 2 - Deleted 850 Domino archive log files and turned off archive logging.
> These 850 files really didn't take up an appreciable amount of space.
>
> The length of the save duration didn't really change that much.  Summary,
> only chopped off 5 minutes by using three less of our 70GB disk drives.
> What's the deal, it's the number of the files and not the size?  So did we
>
> save the 5 minutes by removing the  800+ insignificant l_ archive log
> files and not by the compression of the large files which freed up over
> 200GB?
>
> Before compression:
> 05/11/09  17:32:13 start
> 05/11/09  19:01:48 2017181 blocks processed for sequence 1, volume AMON15
> 05/11/09  20:33:31 2042477 blocks processed for sequence 1, volume AMON25
> 05/11/09  21:00:36 576892 blocks processed for sequence 1, volume AMON35
> 05/11/09  21:00:40 4308 objects saved.
>
> After compression:
> 05/18/09  17:32:12 start
> 05/18/09  19:01:48 1742161 blocks processed for sequence 1, volume AMON11
> 05/18/09  20:33:45 1747936 blocks processed for sequence 1, volume AMON21
> 05/18/09  20:55:23 387384 blocks processed for sequence 1, volume AMON31
> 05/18/09  20:55:26 3555 objects were saved on volumes AMON11 AMON21 AMON31
>
> I figure the number of blocks stored on each tape decreased because the
> data is now compressed and tape compression could not compress it down
> much further.
>
> Rob Berendt
> --
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