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RE: SSD Best practices



fixed

We are going to start using SSD drives on a few systems in the near future. I did research the TRCASPBAL & STRASPBAL commands and was prepared to use them for data placement. My boss heard from a vendor that just loading SSD drives without worrying about 'hot data' will provide performance benefits also. Is this a true statement? Or will there be more bang for the buck to place the 'hot data' on these drives? I believe the plan for these systems was to replace all HDD drives with SSD drives. Thanks for pointing to your presentations.

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Sue Baker
Sent: Tuesday, February 12, 2013 5:20 PM
To: midrange-l@xxxxxxxxxxxx
Subject: Re: SSD Best practices

On 2/11/2013 11:43 PM, Gad Miron wrote:
Beside handpicking hot items to (manually) move to these SSD disks are
there any
proven automatic or semi automatic system procedures to do it
like TRCASPBAL / STRASPBAL(*HSM) etc.

You can programmatically run TRCASPBAL followed by STRASPBAL, if you
want. I include a sample program in my presentations on SSD. URL
www.ibm.com/support/techdocs and then search on my name to find the most
recent version of the presentation.

Most people I talk with that wish to use balancing will trace during
specific time periods each day and then run the STRASPBAL on Saturday or
Sunday to move the data.

I know vendor plugs are frowned upon, but I would be remiss if I didn't
offer the information that there is an IBM Power Systems Lab Services
offering to discuss with you your performance challenges, analyze your
data, and finally make recommendations on what data to flag as resident
on SSD.






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