On Mon, May 22, 2017 at 8:21 AM, Robert S. Hansel (RSH) < r.han...@rshconsulting.com> wrote:
> Gil, > > The RACF database is BDAM (Basic Direct Access Method) and has, to my > knowledge, always been so since it was first released in 1976. The index > records are stored in the database with the profile (data) records, so it > is completely self-contained. I know of no other product using this > structure. > > Live databases should be allocated as PSU. Unmovable prevents the database > from being moved while in use. RACF is weird. It opens its databases at IPL > and then immediately closes them. RACF uses direct disk address I/O to read > and update its databases thereafter. If databases are not allocated as U, a > data management utility, seeing they are not "open", might compress or move > the databases, unaware they are in use - with disastrous results. > I've always hated this about some DSNs. RACF is one. CA-1 use of the TMC & Audit are another. What would be better, IMO, would be either a way to allocate the DSNs to the *MASTER* address space (ASID 1) with DISP=SHR or do a "directed ENQ" to *MASTER* to do a SYSDSN shared ENQ on the RACF database DSNs. I like this latter because it would make it easier to change the RVARY command to update the directed ENQs. > > Live databases should be copied/backed up using the IRRUT200 utility. This > utility freezes update activity to the database before making a copy. The > offline copy can be copied using IEBGENER or the like, or it can be FTPed. > I haven't tried FTPing a RACF database, but I suspect you would want to do > so using BIN. It is generally best to pre-allocate the disk dataset to > which the database it is to be copied, and it must have exactly the same > UNIT, SPACE, and DCB characteristics as the source database, including > CONTIG. The copy needn't be PSU unless you plan to RVARY SWITCH to it so > that it becomes live. > > Regards, Bob > > Robert S. Hansel *** Celebrating 30 years working with RACF *** > Lead RACF Specialist > RSH Consulting, Inc. > 617-969-8211 > www.linkedin.com/in/roberthansel > http://twitter.com/RSH_RACF > www.rshconsulting.com > -- Advertising is a valuable economic factor because it is the cheapest way of selling goods, particularly if the goods are worthless. -- Sinclair Lewis Maranatha! <>< John McKown ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
