FAQ - How are file sizes determined on Connect:Direct Tandem when no Extents are set in the SYSOPTS? (SCI52912)
depends on which platform is receiving.
face=Verdana color=#000000 size=2>The sending platform provides current
allocation based on the sending file attributes - number of blocks
size=2>The receiving platform does its best to interpret the size attributes
provided by the sender
then calculates the space required on the local node.
There's a bit of approximation involved
since differing platforms store data
in different ways
with varying amounts of overhead required for the file. A
Windows data set takes up only the space need to store the data (the EOF
plus the slack space in the last disk cluster allocated for the file.
The same data stored on the Tandem
in a structured file
could take up to
twice that same amount of space if the "worst case" condition occurs
the logical records are stored one record per block with 49% slack space. For
a 2050 byte LRECL in a 4096 byte block. There's only room for one
logical record in the block
so nearly half the space is