What shoulde be my CISIZE in this case.My file RECL = 149,Fixed blocked and KSDS.Thanks.
There is no way we can answer that with what you have provided. The types of question that would need answering include:
-- is the access sequential, random, or a mix (and if a mix, how much random versus sequential)?
-- is the data set accessed by CICS?
-- what is the update pattern for the data set?
-- how much free space is needed, above and beyond the update pattern?
-- what are your site standards?
Terminology note: "fixed blocked" refers to a DCB, which does not apply to VSAM files. VSAM files have controlintervals, not blocks.