RE: Migrating a file to SSD...

<snip>
If I wrote a program (I'm not saying I'll do this) to update every record
in the file it would then be 100% on the SSD?
</snip>

Yes, but there are easier ways. Take Sue Baker's suggestion and call support.

If you only add records and never read them, what good is putting the file on SSD?

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Robert Rogerson
Sent: Thursday, February 28, 2013 10:31 AM
To: Midrange Systems Technical Discussion
Subject: Re: Migrating a file to SSD...

@Dan,
<snip>

Next time you modify a sector of that file paged in from it's old location, it'll page back out to SSD. In other words, 92% of that file hasn't been used since you changed the UNIT.

</snip>
So if this file is only added to the existing HDD allocation would never
decrease?
And the SSD would be increased only for the newly added records?
If I wrote a program (I'm not saying I'll do this) to update every record
in the file it would then be 100% on the SSD?

Thanks,

Rob
On 2013-02-28 11:08 AM, Dan Kimmel wrote:

Next time you modify a sector of that file paged in from it's old location, it'll page back out to SSD. In other words, 92% of that file hasn't been used since you changed the UNIT.

-----Original Message-----
From: [1]midrange-l-bounces@xxxxxxxxxxxx [[2]mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Robert Rogerson
Sent: Thursday, February 28, 2013 9:55 AM
To: [3]midrange-l@xxxxxxxxxxxx
Subject: Migrating a file to SSD...

Hi All,

Yesterday we attempted to migrate a large file (37 Gig) to the SSD using
CHGPF. When I check the file (DSPFD) it confirms that UNIT(*SSD) is now
changed.
This morning when I ran a query on syspartitiondisk it told my that 8% (33
Gig on HDD and 4 Gig on SDD) had been migrated. I was expecting this
percentage to be higher if not at 100%.

Am I misunderstanding? If I specify the UNIT on a file to be SSD does
that not mean that the entire file will be migrated to the SSD?

Thanks,

Rob
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