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I was always in the "run a RCLSTG before very upgrade" camp, but we just
had a bad experience with our last RCLSTG.  We're getting ready to
upgrade V5R2-->V5R3 on an 810 with 4GB main storage, 225 GB internal
DASD at 66% and 565 GB fiber-attached shark external DASD at 69%.  The
last RCLSTG was run two years ago and took about two hours.  We haven't
had any system crashes in this time, however the external DASD was added
after that and has about 7M documents stored on it.  I SWAGed a
guesstimate of 8 hours and requested 24 hours of downtime to run the
RCLSTG.

The first part of the RCLSTG took about 24 hours. (to get to 100%)  Next
it sat at message CPI8218 - Directory recovery in progress for about 10
hours before going on to message CPIA916.  After determining that we
were going to miss our SLA Monday morning the boss ordered an abort.  It
only took about a minute to end after an ALT SYSREQ 2 and then I did a

RCLSTG *DBXREF, which only ran about 6 minutes.  Then I IPLed (B-N) and
all looked normal, a *FULL restart went very quickly.   

There were 12 objects in QRCL: 2 data queues and 9 user spaces beginning
with Q, and 1 file (EKDDSPOBJD, which may have been a WAF temp file as
it no longer exists or seems to be needed.)  There were no /QReclaim or
/QOpenSys/QReclaim directories.

The bottom line is that it is unlikely that we will run a Reclaim
Storage again, at least not until we have an HA environment with a
backup production LPAR.

Regards,
 
Scott Ingvaldson
iSeries System Administrator
GuideOne Insurance Group


-----Original Message-----
date: Thu, 25 Aug 2005 11:27:03 -0400
from: "Doug Hart" <DougHart@xxxxxxxxxxxx>
subject: RE: Preventative Maintenance For AS400


I work at a large (8 systems/23 partitions) iSeries datacenter and they
have
not done a RCLSTG in well over 10 years.
They simply say that they can't be down that long.  They also feel that
since they replace machines on about 3 year cycles they are never that
over
due for the cleanup.  I'm not totally in agreement but they run OK.  I
if
you run RTVDSKINF then PRTDSKINF *SYS look down the report for the line
'Storage affected by RCLSTG'.  It should show the impact of objects to
recover/cleanup.

--
Doug Hart


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