As I read the manual that is correct, however I have no personal experience with HSM CDSs using EA.
Thank You, Dave O'Brien NIH Contractor ________________________________________ From: af dc [acbi...@gmail.com] Sent: Sunday, December 20, 2009 1:50 PM To: IBM-MAIN@bama.ua.edu Subject: Re: DFHSM BCDS is going larger Hi David and Lizette, so, I can create a new BCDS with EA giving more space in the allocation right ?? Can I have MCDS and OCDS without beeing EA ? There's no obligation of all cdss being EA ?? Many thx once more, A.Cecilio On Fri, Dec 18, 2009 at 7:02 PM, Lizette Koehler <stars...@mindspring.com>wrote: > This also might be a way to go. > > From the DFSMS Introduction Manual SC26-7397-02 > > Using DFSMShsm Control Data Sets DFSMShsm control data sets (CDS) are > system-type data sets that DFSMShsm uses to keep track of all DFSMShsm-owned > data. They consist of migration, backup, and offline control data sets. The > control data sets are an inventory of low activity and inactive data that > was stored by DFSMShsm and used to manage its environment. > > DFSMShsm logs its transactions and maintains multiple backup versions of > its CDSs for recovery purposes as specified by the user. > > DFSMShsm can use VSAM KSDS extended addressability (EA) capabilities that > use any of the following serialization techniques for accessing its CDSs: > v Record-level sharing (RLS) access mode > v CDSQ serialization > v CDSR serialization > > VSAM EA capabilities allow each migration control data set (MCDS), backup > control data set (BCDS), and offline control data set (OCDS) cluster to > exceed the 4 GB size. The MCDS and BCDS can span up to four unique KSDS > clusters. The OCDS is limited to a single cluster. The same serialization > technique must be used to access all CDSs > > > -----Original Message----- > >From: "O'Brien, David W. (NIH/CIT) [C]" <obrie...@mail.nih.gov> > >Sent: Dec 18, 2009 12:30 PM > >To: IBM-MAIN@bama.ua.edu > >Subject: Re: DFHSM BCDS is going larger > > > >I checked the archives and the recommendation from a recognized expert on > the subject was freespace(0,50) for the HSM CDSs. > > > >From your past experience, how soon will you hit the warning threshold of > 80%? > > > >My experience tells me that your rate of increase will slow as VSAM > allocates space where it is needed through CI and CA splits. You'll find the > insert pattern is not uniform. > > > >I run with freespace(0,0) and although I may notice rapid growth in the > week or so after the reorg, the rate slows dramatically after that. See how > long it takes to reach 80% and if the rate of increase has slowed enough > bump the warning threshold to 90%. Of course your situation may require a > larger CDS using EA. > > > >Check the Implementation and Customization manual for the following > section: > >Using VSAM Extended Addressability Capabilities > > > >Thank You, > >Dave O'Brien > >NIH Contractor > >________________________________________ > >From: af dc [acbi...@gmail.com] > >Sent: Friday, December 18, 2009 11:48 AM > >To: IBM-MAIN@bama.ua.edu > >Subject: Re: DFHSM BCDS is going larger > > > >Hi David, > >here are the answers: > > > >1. I did a reog on it last sunday, 13th Dec, it becames with 52%, today it > >has: > >ARC0148I BCDS TOTAL SPACE=3132000 K-BYTES, CURRENTLY 868 > >ARC0148I (CONT.) ABOUT 68% FULL, WARNING THRESHOLD=80%, TOTAL > >ARC0148I (CONT.) FREESPACE=52%, EA=NO, CANDIDATE VOLUMES=0 > > > >2. about freespace: > >STATISTICS > > REC-TOTAL--------4498462 SPLITS-CI------------239 > > REC-DELETED---------8225 SPLITS-CA--------------0 > > REC-INSERTED--------9009 FREESPACE-%CI---------10 > > REC-UPDATED--------12843 FREESPACE-%CA---------10 > > REC-RETRIEVED---61529041 FREESPC-------1698484224 > > > >Many thx, A.Cecilio > > > > > > > >On Fri, Dec 18, 2009 at 4:30 PM, O'Brien, David W. (NIH/CIT) [C] < > >obrie...@mail.nih.gov> wrote: > > > >> You are only using a little more than half your RBA so I have 2 > questions: > >> > >> 1. How often do you re-org the BCDS? > >> > >> 2. What are your freespace parameters for the BCDS? > >> > >> Thank You, > >> Dave O'Brien > >> NIH Contractor > >> ________________________________________ > >> From: af dc [acbi...@gmail.com] > >> Sent: Friday, December 18, 2009 11:28 AM > >> To: IBM-MAIN@bama.ua.edu > >> Subject: DFHSM BCDS is going larger > >> > >> Hello, > >> I've DFHSMS V1.8 and our BCDS has: > >> > >> ALLOCATION > >> SPACE-TYPE------CYLINDER HI-A-RBA------3207168000 > >> SPACE-PRI-----------4350 HI-U-RBA------1673625600 > >> SPACE-SEC--------------0 > >> > >> so it's reaching the max extents per volume. > >> In a near, very near future, I'll have to allocate a larger BCDS, can > you > >> pls give me an help, from your experience, what is the "best way to > grow"?? > >> alocate a new one with EA ?? > >> > >> Many thx, Antonio Cecilio. > >> > >> ---------------------------------------------------------------------- > >> For IBM-MAIN subscribe / signoff / archive access instructions, > >> send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO > >> Search the archives at http://bama.ua.edu/archives/ibm-main.html > >> > >> ---------------------------------------------------------------------- > >> For IBM-MAIN subscribe / signoff / archive access instructions, > >> send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO > >> Search the archives at http://bama.ua.edu/archives/ibm-main.html > >> > > > >---------------------------------------------------------------------- > >For IBM-MAIN subscribe / signoff / archive access instructions, > >send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO > >Search the archives at http://bama.ua.edu/archives/ibm-main.html > > > >---------------------------------------------------------------------- > >For IBM-MAIN subscribe / signoff / archive access instructions, > >send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO > >Search the archives at http://bama.ua.edu/archives/ibm-main.html > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
