Hi Lizette and David, thx once more for your sugestions, here is a not so good upd: - My bcds today: ARC0148I BCDS TOTAL SPACE=3132000 K-BYTES, CURRENTLY 188 ARC0148I (CONT.) ABOUT 87% FULL, WARNING THRESHOLD=80%, TOTAL ARC0148I (CONT.) FREESPACE=44%, EA=NO, CANDIDATE VOLUMES=0
STATISTICS REC-TOTAL--------4611413 SPLITS-CI----------20950 REC-DELETED-------232332 SPLITS-CA-----------1512 REC-INSERTED------346063 FREESPACE-%CI---------10 REC-UPDATED-------613409 FREESPACE-%CA---------10 REC-RETRIEVED--273730657 FREESPC-------1439428608 ALLOCATION SPACE-TYPE------CYLINDER HI-A-RBA------3207168000 SPACE-PRI-----------4350 HI-U-RBA------2788392960 SPACE-SEC--------------0 VOLUME VOLSER------------CPS096 PHYREC-SIZE--------12288 DEVTYPE------X'3010200F' PHYRECS/TRK------------4 VOLFLAG------------PRIME TRACKS/CA-------------15 EXTENTS: LOW-CCHH-----X'002E0000' LOW-RBA----------------0 HIGH-CCHH----X'0270000E' HIGH-RBA-------426885119 LOW-CCHH-----X'18660000' LOW-RBA--------426885120 HIGH-CCHH----X'2720000E' HIGH-RBA------3207167999 So, I must schedule an DFHSM intervention soon, and decide if I'll alocate bcds with EA or use multicluster cds (I have Z/OS V1.8 and I don't know how to implement these func. I must read the manuals). Remember that I did the BCDS reorg on December 13th, and it becomes with 52% of free space. So after 15 days it grew 35%. I'ts very strange, we never had to reorg or augment the cds so often, So, any hints are welcome. Many thx once more, A.Cecilio. On Mon, Dec 21, 2009 at 12:15 AM, Lizette Koehler <stars...@mindspring.com>wrote: > I think David's response was good. > > Try and determine how fast you are growing. In my shop, I have a single > NON EA MCDS/BCDS/OCDS which lasts almost 18 months before a reorg. We set > our warning at 97% because we know that it will take a couple of weeks even > at that level to become full. So we have time to schedule a reorg. > > If you are really hurting on size, I would go with the multiple xCDS data > sets first (not the OCDS). > > It will provide the relief you need. Then, if you have a test DFHSM > environment, I would practise the use of the EA. > > Lizette > > > > > > > >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 > > > > > >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
