VSAM Questions and Answers

Describe SHAREOPTIONS parameter (SHR) in Define Cluster command?

It define the cross-region and cross-system sharing capabilities of the dataset. Syntax is SHR (Crvalue, CSvalue) value 1 means multiple read OR single write (read integrity ) 2 means multiple read AND single write ( Write integrity ) 3 means Multiple read AND multiple write 4 is same as 3, which refreshes the buffer with every random access default is SHR(1 3).