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Deepa.m
Warnings : 1
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Joined: 28 Apr 2005
Posts: 88
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How to calculate the maximum records the PS can store using the space parameter.
ex: SPACE(150,(100,30))
what will be the maximum records that it can hold. what is default for AVGREC.is it units or kilobytes? |
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References
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MGIndaco
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Joined: 10 Mar 2005
Posts: 478
Location: Milan, Italy
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Deepa.m
Warnings : 1
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Joined: 28 Apr 2005
Posts: 88
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I want to know the formula to calculate the maximum records for the given example
SPACE(150,(100,30))
Can anyon e provide the same. |
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Deepa.m
Warnings : 1
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Joined: 28 Apr 2005
Posts: 88
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| any updates? |
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Deepa.m
Warnings : 1
Active User
Joined: 28 Apr 2005
Posts: 88
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I was not able to browse the link you provided..Just had a look at example 6.
This is what i want to know..Thanks MGIndaco |
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vidyasaraswathi
Active User
Joined: 10 May 2005
Posts: 74
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Here is some information:
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SPACE(trk,(100,30)) :
This results in a primary allocation of 100 tracks and up to 15 extents of 30 tracks maximum each.
The maximum space that could be allocated is:100 + (30 * 15) = 550 tracks.
TRK - specifies that space is to be allocated by tracks. 1 track on 3390 disk storage equals 56,664 bytes.
Based on this, you can calculate the max no of bytes = 56,664 * 550
Also consider the following example:
// DCB=(LRECL=80,BLKSIZE=9040,RECFM=FB)
Here No of Records= 9040/80 = 113
LRECL=x - specifies the record length of the stored data in bytes. LRECL=80 indicates a logical record length of 80 bytes. For variable-length records, LRECL indicates a maximum record length.
BLKSIZE=y - specifies the physical block length of the data in bytes. For fixed-record length records, 'y' must be a multiple of the LRECL value 'x'. The maximum blocksize allowed on 3390 disk storage is 28,332 (1/2 track) but a maximum of 28,000 is recommended.
Thanks and Regard,
Vidya Bhat |
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