On Thursday 09 October 2008 08:25, Chase, John wrote:
>> -----Original Message-----
>> From: Linux on 390 Port On Behalf Of John McKown
>> The RECFM=FB says that it is fixed blocked. LRECL=1 because it is a "byte
>> stream" (no real records in the z/OS sense). The BLKSIZE=0 is somewhat
>> new. It tells z/OS: "Look at the device and use the optimal BLKSIZE
>>for that specific device." Instead of "hard coding". z/OS usually picks
>>1/2 track blocking on DASD and 32760 on tape.
>
>How many I/Os would it take to read/write, say, the U.S. Declaration of
>Independence?
Depends on what the block size of your parchment device is. It's been a while
since I used such a device, but seem to I remember they have a variable block
size that depended on both the skill of the writer and the quality of their
eyesight. :-) ;-)
- MacK.
-----
Edmund R. MacKenty
Software Architect
Rocket Software, Inc.
Newton, MA USA
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