What is BDAM Dataset?

Virtual Storage Access method - ESDS, KSDS, RRDS & LDS. Basic direct access method, Basic sequential -, Queued sequential -, Basic partitioned -, Indexed sequential -, Object - access method.
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Prakash Jha
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What is BDAM Dataset?

Post by Prakash Jha »

What is meant by BDAM datasets? What is the difference between BDAM and VSAM datasets. Any idea please.
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Robert Sample
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Re: What is BDAM Dataset?

Post by Robert Sample »

Basic Direct Access Method -- allows retrieval of data by relative block number. VSAM RRDS is the equivalent VSAM data type. With BDAM, you have a method to generate the block number (hash or sequence number or whatever) and that block contains the data record. There is no key required, you can read the one block of data you need, but the only way to sequentially access the blocks is one by one (block 0 followed by block 1 followed by block 2 ...). Generally BDAM files are preformatted to prevent retrieval issues if you attempt to read uninitialized data.
Prakash Jha
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Posts: 56
Joined: Sat Jun 29, 2013 1:45 pm

Re: What is BDAM Dataset?

Post by Prakash Jha »

Thank you Robert.

Sorry for coming back late...
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