ADSM-L

Re: Reclaim thresholds

2015-10-04 17:31:35
Subject: Re: Reclaim thresholds
From: Richard Sims [mailto:rbs AT BU DOT EDU]
To: ADSM-L AT VM.MARIST DOT EDU
>MOVE DATA is as fast or faster, but it doesn't reclaim data in =
>aggregates like "real" reclamation.
>
>John Sorensen

Good point, John.  I happened across this APAR, addressing the issue:

IX82232: RECONSTRUCTION DOES NOT OCCUR DURING MOVE DATA

Move data by design does not perform reconstruction
 of aggregates with empty space.  Although this was
 discussed during design, it was decided to only
 perform reconstruction during reclamation.  A major
 reason for this decision was performance as
 reconstruction of aggregates requires additional
 overhead that move data does not; hence requires
 additional time to complete.


Voila - Richard Sims, BU
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