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VSAM Tutorial Conti...
RECORDSIZE(average  maximum|default) o RECORDSIZE specifies the average and maximum lengths, in bytes, of the records in the data component. The minimum record size is 1 byte. o RECORDSIZE can be given as a parameter of either CLUSTER or DATA. o This parameter overrides the LRECL specification on the DATACLASS parameter. o MAXLRECL = CI/CA * (CISZ - 10) o Short Description: RECSZ SHAREOPTIONS(crossregioncrosssystem]|1 3) o SHAREOPTIONS parameter specifies the sharing options of how a component or cluster can be shared among users. o The value of SHAREOPTIONS is assumed to be (3,3) when the data set is accessed in VSAM crossregion  crossregion specifies the amount of sharing allowed among regions within the same system or within multiple systems using global resource serialization (GRS). OPT 1 The data set can be shared by any number of users for read processing, or the data set can be accessed by only one user for read and write processing. OPT 2 The data set can be accessed by any number of users for read processing, and it can also be accessed by one user for write processing. OPT 3 The data set can be fully shared by any number of users. Each user is responsible for maintaining both read and write integrity for the data the program accesses. OPT 4 The data set can be fully shared by any number of users. crosssystem  crosssystem option specifies the amount of sharing allowed among systems. OPT 1 - Reserved OPT 2 - Reserved OPT 3 OPT 3 specifies that the data set can be fully shared. With this option, each user is responsible for maintaining both read and write integrity for the data that user's program accesses.
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