Re: Clarification On Storage

2017-01-07 Thread Walt Farrell
On Sat, 7 Jan 2017 23:19:13 +0200, Binyamin Dissen wrote: >On Sat, 7 Jan 2017 16:57:05 + "Blaicher, Christopher Y." > wrote: > >:>Generally speaking, a page sized request will return a zeroed page, but >there is no guarantee for that

Re: Clarification On Storage

2017-01-07 Thread Blaicher, Christopher Y.
>From the Assembler Services Reference manual: Note: 1.When you obtain storage, the system clears the requested storage to zeros if you obtain either: 8192 bytes or more from a pageable, private storage subpool. 4096 bytes or more from a pageable, private storage subpool, with BNDRY=PAGE

Re: Clarification On Storage

2017-01-07 Thread Mike Myers
I don't know when it wouldn't. I personally wrote the code to zero out a page on its first reference after GETMAIN back in the '70s. But as has been discussed here, if it is part of a page that is FREEMAINed and then the same address is returned by a subsequent GETMAIN, data may likely be

Re: Clarification On Storage

2017-01-07 Thread Binyamin Dissen
On Sat, 7 Jan 2017 16:57:05 + "Blaicher, Christopher Y." wrote: :>Generally speaking, a page sized request will return a zeroed page, but there is no guarantee for that unless you specify that on the GETMAIN. What is the case where it would not return a zeroed

Re: Clarification On Storage

2017-01-07 Thread Itschak Mugzach
The content of the getmained area is much depend on language command and options (COBOL initialize foe example). ITschak נשלח מה-iPad שלי ‫ב-7 בינו׳ 2017, בשעה 21:57, ‏‏Clark Morris ‏ כתב/ה:‬ > [Default] On 7 Jan 2017 08:56:33 -0800, in bit.listserv.ibm-main >

Re: Clarification On Storage

2017-01-07 Thread Clark Morris
[Default] On 7 Jan 2017 08:56:33 -0800, in bit.listserv.ibm-main cblaic...@syncsort.com (Blaicher, Christopher Y.) wrote: >Your example of 4K is important because it is a page in size. A page can only >have one key and can only have one sub-pool associated with it at a time. > >Common memory

Re: Clarification On Storage

2017-01-07 Thread Blaicher, Christopher Y.
Your example of 4K is important because it is a page in size. A page can only have one key and can only have one sub-pool associated with it at a time. Common memory excepted, once the page is freed, it can be re-assigned into any key or sub-pool. Common memory has a whole different set of

Re: Clarification On Storage

2017-01-07 Thread Joel C. Ewing
On 01/07/2017 09:07 AM, esst...@juno.com wrote: > . > I recently read a share presentation on system integrity by Karl Schmitz. > Being a CICS Sysprog I dont get much opportunity to do some of the topics > Karl discussed. > . > . > I do have a question or should I say clarification about STORAGE.

Re: Clarification On Storage

2017-01-07 Thread Itschak Mugzach
Paul Getmain (in private area as you described) in not a real memory frame (which is the term for real memory 4k). It get the key based on the subpool you specify in the macro. So, in short, it is only visible through your asid page tables. Once your asid ends, so does the page tables. This is why

Clarification On Storage

2017-01-07 Thread esst...@juno.com
. I recently read a share presentation on system integrity by Karl Schmitz. Being a CICS Sysprog I dont get much opportunity to do some of the topics Karl discussed. . . I do have a question or should I say clarification about STORAGE. I also looked at the z/OS Authorized Assembler Services

Re: DNS, Resolver, and /etc/hosts

2017-01-07 Thread Elardus Engelbrecht
Steve Horein wrote: >Something like this? >http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/f1a1b3b0/2.5.9 Good link, but that is for z/OS v1.13. >I imagine the same (or similar) topic is documented for z/OS Comm Server 2.x, >... Try this for z/OS v2.1, first URL is for UNIX

Re: DNS, Resolver, and /etc/hosts

2017-01-07 Thread Steve Horein
Something like this? http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/f1a1b3b0/2.5.9 I imagine the same (or similar) topic is documented for z/OS Comm Server 2.x, but I tend to avoid KnowledgeCenter searches in favor of *useful* search interfaces. On Fri, Jan 6, 2017 at 12:16 PM, Phil

Multiprise 3000

2017-01-07 Thread W Mainframe
blockquote, div.yahoo_quoted { margin-left: 0 !important; border-left:1px #715FFA solid !important; padding-left:1ex !important; background-color:white !important; } Anyone has a Multiprise and is planning to sell it?I need one to backup parts. Thank youDan Sent from Yahoo Mail for iPhone

Re: Apache Spark on z listserver or forum?

2017-01-07 Thread David S.
Saw this in the LinkedIn "Performance & Optimization News..." group: http://linkd.in/2i03y7v - "Spark Analytics on the Mainframe Interesting article by Stephen D. Bartlett at the Clipper Group about running Spark on the mainframe: IBM z Systems Get a Big Charge Out of Spark Analytics." Roger Lowe