That's right, ML1 can use SDSP. Sorry. On Sat, Jan 13, 2018 at 3:41 PM, R.S. <r.skoru...@bremultibank.com.pl> wrote: > SDSP? > Isn't it a feature of DFSMShsm? > We're using it for ML1 purposes, I'm not aware of any other purpose, > including "ML0". > > BTW: It is not my problem, I just heard about it. In my opinion it would be > wise to review the application in order to reduce the number of datasets > created. > > -- > Radoslaw Skorupka > Lodz, Poland > > > > > > > > W dniu 2018-01-13 o 21:56, Mike Schwab pisze: >> >> z/OS does have Small Data Set Packing. Puts datasets under your exit >> size limit into a VSAM KSDS. For another storage pool, we did run >> into problems with not enough entries in the VTOC, so we created >> smaller volumes with large VTOCs. >> >> On Sat, Jan 13, 2018 at 2:19 PM, R.S. <r.skoru...@snipped.com.pl> wrote: >>> >>> Ron, >>> While your solution can keep "small" datasets away from EAS, it is not a >>> solution for a need I described. >>> I mean a scenarion when many thousands of relatively small datasets need >>> to >>> be kept on disk. Colleague of mine administer a system, where ~200 000 >>> datasets are created during EOD. >>> >>> Of course when we talk about big storage needs it's usually not-so-many >>> datasets, but big or huge ones. >>> Last, but not least, we have limited choice - up to 64(-256) non-EAV >>> volumes >>> or bigger EAV volumes (with the same limit for quantity). >>> >>> Regards >>> -- >>> Radoslaw Skorupka >>> Lodz, Poland >>> >>> >>> >>> >>> >>> >>> >>> W dniu 2018-01-13 o 19:02, Ron hawkins pisze: >>>> >>>> Radoslaw, >>>> >>>> That's why you can change the threshold for the track allocation area. >>>> >>>> DCOLLECT and PROC UNIVARIATE will probably give you all the guidance you >>>> need. DCOLLECT does not have the primary space allocation size so this >>>> code >>>> is not 100% accurate. It is good enough to give some guidance. >>>> >>>> I executed this against one of our general purpose lab systems, and this >>>> is the CMA waste estimate with break point value at 5, 10 and 20 >>>> cylinders. >>>> >>>> EAV Breakpointvalue 10 Cylinders >>>> Total Used Cylinders 7516066.07911661 >>>> Total Wasted Cylinders 610787.607878009 >>>> Percent Wasted CMA 8.1% >>>> >>>> EAV Breakpointvalue 5 Cylinders >>>> Total Used Cylinders 7516066.07911661 >>>> Total Wasted Cylinders 783635.165880735 >>>> Percent Wasted CMA 10.4% >>>> >>>> EAV Breakpointvalue 20 Cylinders >>>> Total Used Cylinders 7516066.07911661 >>>> Total Wasted Cylinders 309321.636811143 >>>> Percent Wasted CMA 4.1% >>>> >>>> You could use SAS code like this to come up with a good starting point >>>> for your shop when you go EAV. >>>> >>>> options obs=max bufno=256 nosource2 nomacrogen nosymbolgen nomlogic >>>> nomprint sortsize=6G msglevel=i; >>>> goptions reset=all; >>>> >>>> %let BPV=20; >>>> >>>> Title1 "EAV Breakpoint Value &BPV Cylinders"; >>>> *** >>>> Main Output Title ; >>>> >>>> FILENAME DCOLLECT FTP ( >>>> "MY.DCOL'" >>>> ) >>>> USER='myuid' HOST='111.222.333.444' DEBUG >>>> S370VS RCMD='SITE RDW' LRECL=32760 >>>> PASS='mypw'; >>>> >>>> proc datasets lib=pdb kill noprint; >>>> run;quit; >>>> >>>> proc datasets lib=work kill noprint; >>>> run;quit; >>>> >>>> %include sourclib(typedcol); >>>> run; >>>> >>>> data dcolsp; >>>> set dcoldset; >>>> usedcyl=dcdusesp/(15*56664); >>>> if usedcyl>&BPV then wastecyl=mod(usedcyl,21); >>>> output;return; >>>> run; >>>> >>>> title2 "Data set size distribution in Cylinders"; >>>> proc univariate data=dcolsp; >>>> var usedcyl; >>>> histogram; >>>> run; >>>> >>>> title2 "Cylinder Managed Area - Data set size distribution in >>>> Cylinders"; >>>> proc univariate data=dcolsp; >>>> where usedcyl>&bpv; >>>> var usedcyl; >>>> histogram; >>>> run; >>>> >>>> proc summary data=dcolsp nway; >>>> var usedcyl wastecyl; >>>> output out=dcolsum >>>> sum= >>>> ; >>>> run; >>>> >>>> data _null_; >>>> set dcolsum; >>>> pctwaste=wastecyl/usedcyl; >>>> put "EAV Breakpointvalue &BPV Cylinders" >>>> / "Total Used Cylinders " usedcyl best16. >>>> / "Total Wasted Cylinders " wastecyl best16. >>>> / "Percent Wasted CMA " pctwaste >>>> percent16.1 >>>> ; >>>> run; >>>> >>>> >>>> -----Original Message----- >>>> From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On >>>> Behalf Of R.S. >>>> Sent: Friday, January 12, 2018 5:48 AM >>>> To: IBM-MAIN@LISTSERV.UA.EDU >>>> Subject: Re: [IBM-MAIN] AW: Re: Number of Cylinders per Volume >>>> >>>> W dniu 2018-01-12 o 13:15, Tom Marchant pisze: >>>>> >>>>> On Fri, 12 Jan 2018 01:32:07 +0100, R.S. wrote: >>>>> >>>>>> BTW: an "awful waste of storage" is MCU on EAS which is 21 cyl. (315 >>>>>> trk). It is much more than 4kB and more than 4MB. >>>>> >>>>> Not such a big deal for very large data sets, which are the most >>>>> appropriate ones to go into the cylinder-managed space. When you have >>>>> a quarter of a million cylinders, allocating space on increments of 21 >>>>> cylinders isn't so bad, IMO. >>>>> >>>> Of course. However sometimes people need a lot of not-so-big datasets. >>>> For ~1000 cyl datasets average lost is ~1% ( (21/2)/1000 ), but for 50 >>>> cyl >>>> datasets is ~20%. >>>> >>>> -- >>>> Radoslaw Skorupka >>>> Lodz, Poland > > > ====================================================================== > > > -- > Treść tej wiadomości może zawierać informacje prawnie chronione Banku > przeznaczone wyłącznie do użytku służbowego adresata. Odbiorcą może być > jedynie jej adresat z wyłączeniem dostępu osób trzecich. 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