Re: CHGPF time

Rob,

You have redefined the meaning of the word "envy" for me... :-)

Your SSD utilization seems a little bit high. Also, on the URL I
posted before, they have a nice chart on the impact of having a lot of
main memory over performance.

Regards,

Luis Rodriguez
IBM Certified Systems Expert — eServer i5 iSeries



On Mon, Jan 18, 2010 at 11:11 AM, <rob@xxxxxxxxx> wrote:

I installed my 4 SSD's over the weekend.
I did the DSPOBJD of the desired libraries to an output file.
Then I ran a little sql which passed the object and library via qcmdexc to
CHGPF and CHGLF.  Over thousands objects it only took about 8 minutes.
Then I saved the libraries, deleted them and restored them.
After some time my ninety 70GB drives and my new SSD's were somewhat in
balance.

All good.

At the same time I added forty eight 139GB HDD's.  All drives are raid 5
with no hot spare and are all in asp 1.  I didn't add one of the new 48 to
the asp - just the raid set.  Reserving that one drive for load source
migration.

Then I ran the STRASPBAL *ENDALC on disks 2 through 90.  Fired off the
STRASPBAL *MOVDTA.  Drives 2 - 90 are down to about 0.2% used.  Good.
However my load source and my SSD's are now about 98%.  The 47 other new
drives are 44% used.  Not good.  Not much good came out of
STRASPBAL TYPE(*CAPACITY) ASP(1) TIMLMT(*NOMAX)
Date sent  . . . . . . :   01/18/10      Time sent  . . . . . . : 09:35:26
CPI1474 - ASP balancing successfully started for ASP 1.
Date sent  . . . . . . :   01/18/10      Time sent  . . . . . . : 09:35:55
CPI1475 - ASP balancing for ASP 1 ended.

I get these somewhat in balance my intention is perhaps then run a
TRCASPBAL followed by a STRASPBAL *USAGE to maximize performance of my
HDD's.  Then I may run another TRCASPBAL followed by a STRASPBAL *HSM to
put high impact stuff on SSD (and get the low impact the heck off!).

Rob Berendt
--
Group Dekko Services, LLC
Dept 01.073
Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com

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