Interested to Buy Any Domain ? << Click Here >> for more details...
What is the difference between primary and secondary
allocations for a dataset?
- 8 Answers
- 48813 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / guest
Secondary allocation is done when more space is required
than what has already been allocated.
| Is This Answer Correct ? | 49 Yes | 6 No |
Answer / saikat dey
total storage of Space=(cyl,(5,10),rlse)is not 5 + 16*10 =
165 cylinders.
For sequential file total extent is 16 that not mean above.
Total space of it would be [(1*5)+(15*10)]=155 Cylinders.
| Is This Answer Correct ? | 33 Yes | 2 No |
Answer / s
A dataset is created in extents. Extents are contiguous
space of tracks, cyls or blocks. The first extent is called
the primary allocation. As the dataset grows, dataset is
extended using secondary extents.
| Is This Answer Correct ? | 25 Yes | 5 No |
Answer / sash
Primary allocation is treated as an one extend. So total
space for a dataset would be Primary + 15 * secondary.
| Is This Answer Correct ? | 11 Yes | 0 No |
Answer / satya prakash
For a Dataset in primary allocation is needed. The number is
close to the total requirement as possible. The secondary
quantity is an additional quantity that can be used only if
dataset exceeds the space allocated with the primary quantity
| Is This Answer Correct ? | 7 Yes | 5 No |
Answer / jignesh patel
The primary allocation is the space units given to the
empty new dataset initially. Though primary & secondary
spaces are allocated during defination it wont allow the
dataset to use the secondary allocation till the time
primary allocation fully acquired by the data of that
dataset.
As mentioned above, dataset uses the primary & secondary
spaces in the sense of EXTENT mode. the memory allocated is
virtually departed in the 16 extents. System can allocate
primary + secondary*16 space units in the best case.
| Is This Answer Correct ? | 5 Yes | 14 No |
Answer / saroja kolli
Primary and the secondary allocations are the space
allocated for a particular dataset.
Primary indicates that the mian storage allcoated and for
the specified dataset the storage allocated primarily is
not sufficient then it will go for the secondary extents.
Secondary allocation will be usually 16 extents
Example:
Space=(cyl(5,10),rlse) is specified for any dataset then
the dataset will be allocated with the total storage of
5 + 16*10 = 165 cylinders.
| Is This Answer Correct ? | 16 Yes | 29 No |
Is it possible to left uncode disp? If yes, how?
How dummy is used in jcl?
What is 'S0C7' abend?
In JCL..for TIME Parameter was specified both JOB & STEP..which one is overrides
How can we increment subscript and index?
SORT card to eliminate duplicity.
Are there any set of rules for the names of the steps used in a job? What are they?
What is the difference between a PDS member and a GDG Generation ? Is it only this, that with a generation we can use +1, 0, -1 etc while with PDS member we can not ?
Explain the function of the steplib dd statement?
A maximum of 100 chars can be passed to Cobol through Parm in JCL, If we want to pass more than 100 Chars how we can do it ?
how to compare two datasets without using superce because output is limited to 133 bytes
Is CPU time (TIME parameter) assigned to a JOB and JOBSTEP BOTH, by default ?
COBOL 
