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 [[email protected]] Sent: Friday, December 18, 2009 11:48 AM To: [email protected] 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] < [email protected]> 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 [[email protected]] > Sent: Friday, December 18, 2009 11:28 AM > To: [email protected] > 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 [email protected] 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 [email protected] 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 [email protected] 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 [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
