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krishnareddymsc
New User
Joined: 08 Jan 2007
Posts: 9
Location: Bangalore
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when we are creating a PDS ,IF we specify Directory blocks =5 , then
how many member we can save in that PDS(Max)....... |
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Bitneuker
CICS Moderator
Joined: 07 Nov 2005
Posts: 1104
Location: The Netherlands at Hole 19
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| Why would you want to know? Just store your members and if it's full increase the size or compress. |
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ofer71
Global Moderator
Joined: 27 Dec 2005
Posts: 2358
Location: Israel
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Or simply create a PDS-E instead of PDS.
O. |
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kgumraj
Active User
Joined: 01 May 2006
Posts: 151
Location: Hyderabad
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Hi,
| krishnareddymsc wrote: |
If we specify Directory blocks =5 ,
then how many member we can save in that PDS(Max) |
If Directory block = 0 then it is a sequential file
In other case Directory block > 0, it is a PDS and by giving this you can see controll the members of the PDS
Each Directory block will store 6 member information.
To tell more about Directory block, you need to understand PDS first.
PDS is a dataset where you have many members in it--> this is as visuallies by the user.
But internally PDS is a sequential file, apart form having the data, it has also pointers information that points to the member when invoked.
Hope you got it. |
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itjagadesh
New User
Joined: 05 Dec 2006
Posts: 89
Location: chennai
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hi all ,
according to my knowledge you can store upto 25 members in a PDS if the directory block is 5
ie) one directory block can accomodate 5 members (may be 6 not sure) in a PDS.
i tried this one.
correct me if i am wrong. |
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expat
Global Moderator
Joined: 14 Mar 2007
Posts: 8797
Location: Welsh Wales
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With statistics on, one directory block will hold six members. I am not sure, I have not tested this nor do I intend to, but think it is eight with statistics off.
When allocating directory blocks it should be remembered that the number of directory blocks per 3390 track is 45, with one exception. The last track used for directory blocks will contain only 44 directory blocks.
So when you do allocate directory blocks use 44 + (n * 45) to calculate the number of blocks to completely use a whole 3390 track. After all if you allocate the track to directory space, you might as well use all of it. |
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