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VANGUARD SECURITY CONFERENCE 2008 22nd ANNUAL | JUNE 1 – 5 | LOS ANGELES, CA This e-mail and any attachments are intended solely for the use of the addressee and may contain information that is PRIVILEGED and CONFIDENTIAL. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination of this e-mail or any attachments is strictly prohibited. If you have received this e-mail in error, please delete all copies of this e-mail and any attachments and notify the sender immediately. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Put SETLOCK TEST question to rest
But the real question is: what are you serializing? Can you use ENQ? can you use PLO? Inappropriate use of the CMS lock can adversely affect the running of the system. Peter, first let me thank you for the education I couldn't get from the book. Again, I'm in the research phase and decided to drop the Lock and consider higher level serialization method. Sam, here is the definition of SRR from POP. When a common storage area larger than a doubleword is to be updated, it is usually necessary to provide special interlocks to ensure that a single program at a time updates the common area. Such an area is called a serially reusable resource (SRR). Thank you all and we can put this to rest. Sail Kim Vanguard Research Institute, Inc. PLEASE JOIN US AT OUR 21st ANNUAL ENTERPRISE/RACF SECURITY TRAINING CONFERENCE AND EXPOSITION! June 10 - June 14, 2007 St. Louis, Missouri Register Today www.go2vanguard.com/expo thinkSecurity thinkVanguard This e-mail and any attachments are intended solely for the use of the addressee and may contain information that is PRIVILEGED and CONFIDENTIAL. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination of this e-mail or any attachments is strictly prohibited. If you have received this e-mail in error, please delete all copies of this e-mail and any attachments and notify the sender immediately. Thank you. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: SETLOCK TEST question please
variant, SETLOCK TEST,TYPE=HIER which answers the question It sure answered one of my question. THANKS! That can be considered to be true, but is irrelevant. The CMSSMF and CMSEQDQ locks are *not* part of the intended programming interface. You are expected *not* to obtain them. However, I don't want to obtain CMS lock while CMSSMF or CMSEQDQ is held (ABEND073). This is correct. There are no hierarchy considerations related to obtaining the CPU lock True with spin lock. But, not true with suspend lock per document. And always obtainable for disablement of interrupts and I/O. I was kind of waiting for IBMer to join in. Here is the entire question and my effort is to completely eliminate any chance of the lock violation. What test do I need before (if any): SETLOCK OBTAIN,TYPE=LOCAL What test do I need before (if any): SETLOCK OBTAIN,TYPE=CMS . . . What test do I need before (if any): SETLOCK RELEASE,TYPE=CMS What test do I need before (if any): SETLOCK RELEASE,TYPE=LOCAL TIA, Sail Kim Vanguard Research Institute, Inc. PLEASE JOIN US AT OUR 21st ANNUAL ENTERPRISE/RACF SECURITY TRAINING CONFERENCE AND EXPOSITION! June 10 - June 14, 2007 St. Louis, Missouri Register Today www.go2vanguard.com/expo thinkSecurity thinkVanguard This e-mail and any attachments are intended solely for the use of the addressee and may contain information that is PRIVILEGED and CONFIDENTIAL. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination of this e-mail or any attachments is strictly prohibited. If you have received this e-mail in error, please delete all copies of this e-mail and any attachments and notify the sender immediately. Thank you. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: SETLOCK TEST question please
compare-and-swap or Perform Locked Operation or maybe the GRS Latch Manager services. Primary concern is serializing SRR and I'm in the research phase. The CS and CDS is out due to size of the data. Locked Operation with Free-Pool manipulation and the Latch manager are being considered. Thanks Jeff, Sail Kim Vanguard Research Institute, Inc. PLEASE JOIN US AT OUR 21st ANNUAL ENTERPRISE/RACF SECURITY TRAINING CONFERENCE AND EXPOSITION! June 10 - June 14, 2007 St. Louis, Missouri Register Today www.go2vanguard.com/expo thinkSecurity thinkVanguard This e-mail and any attachments are intended solely for the use of the addressee and may contain information that is PRIVILEGED and CONFIDENTIAL. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination of this e-mail or any attachments is strictly prohibited. If you have received this e-mail in error, please delete all copies of this e-mail and any attachments and notify the sender immediately. Thank you. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: SETLOCK TEST question please
Thanks to Binyamin, Jeff and Sam, Yes, serialization is a must and the lock is the fastest path that I need. FRR is in place and I don't want to use anything higher than CMS unless I have to. I also know that the CMSSMF and CMSEQDQ are in same level as CMS. I may be also in need of using MVS service that requires CMS lock. Sail Kim Vanguard Research Institute, Inc. PLEASE JOIN US AT OUR 21st ANNUAL ENTERPRISE/RACF SECURITY TRAINING CONFERENCE AND EXPOSITION! June 10 - June 14, 2007 St. Louis, Missouri Register Today www.go2vanguard.com/expo thinkSecurity thinkVanguard This e-mail and any attachments are intended solely for the use of the addressee and may contain information that is PRIVILEGED and CONFIDENTIAL. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination of this e-mail or any attachments is strictly prohibited. If you have received this e-mail in error, please delete all copies of this e-mail and any attachments and notify the sender immediately. Thank you. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: SETLOCK TEST question please
btw: There was a time in ancient MVS history when the Class Locks Held field could be used for direct comparison to determine whether there were any higher locks held than the lock in question. That was all redesigned who-knows-when, so there is now no easy way (i.e., IBM programming interface) to see the lock hierarchy. I seem to remember that too. I just wrote a small program to test the case. First, I obtained CPU lock and tested for the CMS and got the lock available condition. I then, obtained TRACE and then SRM lock and tested for the CMS and again got the lock available condition. I was expecting what Binyamin was expecting due to the lock system being hierarchical. I didn't want to get the hierarchy violation by obtaining a lower one while higher one is held which will be abend073. My little test is telling me that I just can't ask for the CMS lock by testing CMS lock only. However, many other higher locks are not documented except in the SETLOCK macro itself. What one must do to safely obtain the CMS or higher lock then release it? Sail Kim Vanguard Research Institute, Inc. PLEASE JOIN US AT OUR 21st ANNUAL ENTERPRISE/RACF SECURITY TRAINING CONFERENCE AND EXPOSITION! June 10 - June 14, 2007 St. Louis, Missouri Register Today www.go2vanguard.com/expo thinkSecurity thinkVanguard This e-mail and any attachments are intended solely for the use of the addressee and may contain information that is PRIVILEGED and CONFIDENTIAL. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination of this e-mail or any attachments is strictly prohibited. If you have received this e-mail in error, please delete all copies of this e-mail and any attachments and notify the sender immediately. Thank you. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
SETLOCK TEST question please
When a higher lock than what is being tested is held, what condition would I get back from SETLOCK TEST? Providing that I'm testing for the CMS or higher lock which is not held. TIA, Sail Kim Vanguard Research Institute, Inc. PLEASE JOIN US AT OUR 21st ANNUAL ENTERPRISE/RACF SECURITY TRAINING CONFERENCE AND EXPOSITION! June 10 - June 14, 2007 St. Louis, Missouri Register Today www.go2vanguard.com/expo thinkSecurity thinkVanguard This e-mail and any attachments are intended solely for the use of the addressee and may contain information that is PRIVILEGED and CONFIDENTIAL. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination of this e-mail or any attachments is strictly prohibited. If you have received this e-mail in error, please delete all copies of this e-mail and any attachments and notify the sender immediately. Thank you. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
