Thank Peter and Nick Jones for your explanation.
 
Only now I could answer.

Thinking about compatibility: when the SMF is written on SMF files (MANx) it is 
possible to read, with a user program (in assembler, obviously), any records by 
user's criteria. Now, using SMF Logstream this will not be possible if IBM 
doesn't give us support with IXGBRWSE.
 
I know installations which have this kind of access on SMF MANx files to get 
some informations as soon as possible. I think that has good services using 
this kind of facility.
 
I think IXGBRWSE could be more flexible on z/OS 2.1 and give an option to the 
caller specifies a parameter about the compression or this "uncompression" 
could be another available standard service.
  
José ADAUTO Ribeiro


De: Peter Relson < [email protected] >
Enviada: Segunda-feira, 18 de Novembro de 2013 16:14
Para: [email protected]
Assunto: Re: IXGBRWSE - SMF Logstream

IXGBRWSE returns via the buffer keyword the exact area that the exploiter 
requested to be written to the logstream.
Thus, it is that exploiter that knows the mapping.

I conclude, by the fact that SMF apparently documents only the SMF record 
itself (and that an SMF record is only part of the logstream record), that 
ether 
- SMF does not want you to be reading these records 
 and dealing with them on your own; or
- it's an oversight; or
- it was thought about but was not thought worthwhile.

Is there a business need for reading the logstream that such a program as 
IFASMFDL does not accommodate? 

Peter Relson
z/OS Core Technology Design

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