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shchan
New User
Joined: 06 Jun 2007
Posts: 58
Location: Hyderabad
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Can any one help:
What are BDAM files in Mainframe? |
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superk
Global Moderator
Joined: 26 Apr 2004
Posts: 4652
Location: Raleigh, NC, USA
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| Basic Direct Access Method. |
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shchan
New User
Joined: 06 Jun 2007
Posts: 58
Location: Hyderabad
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Thanx kevin.
can u help me with some manual on these files?? |
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Mistermind
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Joined: 08 Feb 2008
Posts: 46
Location: Dublin
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BDAM is used for maximum speed of access.
Basic because it is not even queued. It is synchronous I/O, read/write is performed in sequence with user CPU insturctions, no read-ahead, no overlap queuing for write later. It is not even buffered, reading one record at a time.
Direct addressing for speed, using track and record count. It needs to be allocated via ISPF using a special parameter. Unless you have inherited a BDAM file and legacy code, no point using BDAM. |
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