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How many members we can save in PDS if DirBlk=5

 
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krishnareddymsc

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Joined: 08 Jan 2007
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Location: Bangalore

PostPosted: Thu Jan 11, 2007 3:48 pm    Post subject: How many members we can save in PDS if DirBlk=5
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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

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Joined: 07 Nov 2005
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PostPosted: Thu Jan 11, 2007 4:02 pm    Post subject:
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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

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PostPosted: Thu Jan 11, 2007 4:45 pm    Post subject:
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Or simply create a PDS-E instead of PDS.

O.
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kgumraj

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PostPosted: Fri Jan 12, 2007 1:56 pm    Post subject: Re: reg:creating a PDS woth DirBlk=5...
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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

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PostPosted: Tue May 08, 2007 1:22 pm    Post subject: Re: How many members we can save in PDS if DirBlk=5
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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

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PostPosted: Tue May 08, 2007 1:35 pm    Post subject:
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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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