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guruguha
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Joined: 02 Apr 2007
Posts: 12
Location: Chennai
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Hi,
Is there any tool available to calculate the space parameters knowing the Volume(no. of records in the input file) and the LRECL of output? |
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ramfrom84
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Joined: 23 Aug 2006
Posts: 93
Location: chennai
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| U can calculate the Space Parameter = No of records * record length, which gives u Total Bytes occupied by the File. From this u allocate the File using TRKS. |
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expat
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Joined: 14 Mar 2007
Posts: 8797
Location: Welsh Wales
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| Quote: |
| U can calculate the Space Parameter = No of records * record length, which gives u Total Bytes occupied by the File. From this u allocate the File using TRKS. |
Almost ...............
Divide the LRECL into the optimum blocksize for the device you will allocate the dataset onto, 27998 for 3390, and divide by two. Incorrect - please see below.
This gives you the number of records per track.
Divide the total number of records by the number above to give you tracks.
Divide by 15 to get the number of cylinders required. Add 10 - 15% for contingency and growth, and there you go. |
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Anuj Dhawan
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Joined: 22 Apr 2006
Posts: 6250
Location: Mumbai, India
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expat
Global Moderator
Joined: 14 Mar 2007
Posts: 8797
Location: Welsh Wales
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Updated, and corrected version
Divide the LRECL into the optimum blocksize for the device you will allocate the dataset onto, 27998 for 3390, and multiply the integer value by two.
This gives you the number of records per track.
Divide the total number of records by the number above to give you tracks.
Divide by 15 to get the number of cylinders required. Add 10 - 15% for contingency and growth, and there you go.
As a bonus, I usually use tracks for allocations LE 75 tracks, and cylinders for allocations above 75 tracks. |
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