On Thu, 21 Jun 2012 04:25:48 -0500, Elardus Engelbrecht 
<[email protected]> wrote:

>Mark Zelden wrote:
>
>>I'm not sure exactly.  Maybe to keep 2 of them start are started at the same 
>>time from causing a problem since nothing else uses that qname/rname.
>
>This is what I also guessed. Prevent two or more 'I SMF' happening at the same 
>time in a Sysplex.
>
>>As for the RESERVEs done when the output is on DASD,  I commented out that 
>>code 15 years ago.   I have no clue what purpose it serves to reserve the 
>>entire volume when writing an output data set to disk.
>
>I also don't use RESERVEs. I forgot to mention that I get a lot of IOS071I 
>????,**,SMS, START PENDING messages during a switch.
>
>So, after my nightly jobs, I try to dump/clear all my SMF datasets around 
>07:00 and thus hopefully avoid a 'I SMF' during production hours and the 
>resulting IOS071I.
>
>Thanks Mark for your reply.
>

What do you mean you don't use reserves?  You have commented them out in the
code, or your IODF/HCD isn't coded for shared DASD thus not issuing the
reserves?

If you are seeing the start pendings, it looks like you do have the reserves
in the code.   All my LPARs start an STC using the SMFDUMP program
that issues the "I SMF" at the same time and there is no problem.

Regards,

Mark
--
Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS       
mailto:[email protected]                                        
Mark's MVS Utilities: http://www.mzelden.com/mvsutil.html 
Systems Programming expert at http://expertanswercenter.techtarget.com/

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