I have a basic question about coding of spanned records in assembler program.
I have worked lot on non spanned VSAM records.
Now the question is how to create a spanned record?
what are things that i should take care for as compared to non spanned VSAM records (for eg in ACB,RPL macros also in JCL and DS section).
A spanned record is a variable-length record in which the length of the record can exceed the size of a block. A record is called spanned record if it is split between two or more blocks.
Spanned records are logical records that are larger than the CI size. To have spanned records, the file must be defined with the SPANNED attribute at the time it is created. Spanned records are allowed to extend across or span control interval boundaries. The RDFs describe whether the record is spanned or not.
Spanned records are needed when the application requires very long logical records. A spanned record may be the data component of an AIX cluster. If spanned records are used for KSDS, the primary key must be within the first control interval. Refer toAlternate indexes.
For closer information plse look at IBM.COM, search for VSAM Redbooks,
Title: VSAM Demystified