Author: don.leahy
Posted: Tue Apr 11, 2017 5:02 pm (GMT 5.5)
Data bases contain a significant amount of free space in order to efficiently handle Inserts, so it is difficult to tell the Unload data set size by looking at the physical VSAM file. If you run a Reorg before your unload, the utility should produce a report of the number and size of each segment type.
Unload utilities typically add a prefix to each unloaded record that contains control information that is used if the data is loaded again. The size of the prefix can vary by data base type and the product that is used to unload it, but the size can be substantial enough that you would need to take it into account when you calculate the space requirements of the unload data set.
_________________
"Let's work the problem, people. Let's not make things worse by *guessing*".
http://donleahy.blogspot.com/
Posted: Tue Apr 11, 2017 5:02 pm (GMT 5.5)
Data bases contain a significant amount of free space in order to efficiently handle Inserts, so it is difficult to tell the Unload data set size by looking at the physical VSAM file. If you run a Reorg before your unload, the utility should produce a report of the number and size of each segment type.
Unload utilities typically add a prefix to each unloaded record that contains control information that is used if the data is loaded again. The size of the prefix can vary by data base type and the product that is used to unload it, but the size can be substantial enough that you would need to take it into account when you calculate the space requirements of the unload data set.
_________________
"Let's work the problem, people. Let's not make things worse by *guessing*".
http://donleahy.blogspot.com/
