Re: 5761SS1-42 HA Journal Performance

[Charles Wilt <charles.wilt@xxxxxxxxx>]

Forgot to say...

If your journal receivers are still on non-SSD disks....I could see
why your month end didn't improve much.

Read the REDBOOK linked to in my other post, but basically if you're
journalling but not using commitment control, then for every write to
an SSD, you're waiting on a write to the other disks holding the
journal receiver.

The HA Journal Performance should make a big difference.

HTH,
Charles

On Fri, Mar 12, 2010 at 12:04 PM,  <rob@xxxxxxxxx> wrote:
> Anyone out there using 5761-SS1, option 42 HA Journal Performance?
> Did it really make a difference?
> While we got some performance in our month end after purchasing SSD's we
> didn't get near the performance benefit that we got in Rochester.  While
> in Rochester we didn't journal the files because the data was in an IASP
> and we were under time constraints to deal with the hassles of moving the
> journals into the data library out of #MXJRN and making sure Mimix was
> cool with this.  So we just didn't journal the data.
>
> IBM ran some tracing on our last month end here and now they are
> recommending we purchase the option 42.
>
>
> Rob Berendt
> --
> Group Dekko Services, LLC
> Dept 01.073
> Dock 108
> 6928N 400E
> Kendallville, IN 46755
> http://www.dekko.com
>
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