Virtual Storage Access Method (VSAM)

Q76) How many buffers are allotted to VSAM KSDS and ESDS?A76) 2 data buffers by default for ESDS. For KSDS it allots 2 data buffers and 1 index buffers. each buffer is about 4k.

Q77) what's the biggest disadvantage of using a VSAM dataset?A77) FREE SPACE(FPSC)

Q78) what's the device independent method to indicate where a Record is Stored?A78) By USING RBA(Relative Byte Address).

Q79) How many times secondary space allocated?A79) 122 TIMES

Q80) what is the RRN for the first record in RRDS?A80) The answer is : 1

Q81) what is a Base Cluster?A81) The Index and data components of a KSDS

Q82) If FSPC(100 100) is specified does it mean that both the control interval and control area will be left empty because 100 % of both CI and ca are specified to be empty?82) No, they would not be left empty. one record will be written in each CI and 1 CI will be written for each ca.