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inforajesh
New User
Joined: 09 Dec 2020 Posts: 20 Location: India
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Hello,
My requirement was to find space consumption of particular VSAM file and extrapolate for full year.(To communicate SMS team)
Performed LISTCAT and found the actual used values. However can someone help me how to extrapolate for one year (In Cylinder values)
LISTCAT Details
STATISTICS
REC-TOTAL-------------15 SPLITS-CI--------------0 EXCPS-----------------22
REC-DELETED------------0 SPLITS-CA--------------0 EXTENTS----------------1
REC-INSERTED-----------0 FREESPACE-%CI----------0 SYSTEM-TIMESTAMP:
REC-UPDATED------------0 FREESPACE-%CA----------0 X'D96E1C21533BCE25'
REC-RETRIEVED---------10 FREESPC-----------688128
ALLOCATION
SPACE-TYPE------CYLINDER HI-A-RBA----------720896 EXTENT-NUMBER----------1
SPACE-PRI--------------1 HI-U-RBA-----------32768 EXTENT-TYPE--------X'00'
IDCAMS SYSTEM SERVICES
SPACE-SEC--------------1
VOLUME
VOLSER------------WORK12 PHYREC-SIZE--------16384 HI-A-RBA----------720896 EXTENT-NUMBER----------1
DEVTYPE------X'3010200F' PHYRECS/TRK------------3 HI-U-RBA-----------32768 EXTENT-TYPE--------X'00'
VOLFLAG------------PRIME TRACKS/CA-------------15
EXTENTS:
LOW-CCHH-----X'02B50000' LOW-RBA----------------0
HIGH-CCHH----X'02B5000E' HIGH-RBA----------720895
EXTENTS:
LOW-CCHH-----X'02B50000' LOW-RBA----------------0 TRACKS----------------15
HIGH-CCHH----X'02B5000E' HIGH-RBA----------720895
Actual used :
HI-U-RBA : 32768
HI-A-RBA : 720896
(HURBA / HARBA) = Ratio used
32768 / 720896 = 0.0454545454545455
Total allocated cylinder * Ratio used = Actual used
1 * 0.045 = 0.045
Based on this result, can someone help me to extrapolate the storage (cylinder) for full year ?
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Joerg.Findeisen
Senior Member
Joined: 15 Aug 2015 Posts: 1245 Location: Bamberg, Germany
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You can use a Crystal Ball to find the amount of data being added to the VSAM cluster for a year. What a stupid requirement. |
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Willy Jensen
Active Member
Joined: 01 Sep 2015 Posts: 712 Location: Denmark
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Are an equal number of records added each month? No records updated or deleted? Then take the current size divide with the number of months the cluster have been in existence and multiply by 12. Again assuming an equal number of records added per month. The result will most likely be way off the mark. Whatever approach you take, be sure to monitor the size of the cluster regularly and make sure that there is space enough on the disk to allow for expansion. |
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Joerg.Findeisen
Senior Member
Joined: 15 Aug 2015 Posts: 1245 Location: Bamberg, Germany
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When you make the VSAM SMS EA/ECR you can have 7257 Extents (59 x 123). So based on current allocation, that would be the time when Aliens take over world domination. |
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