What is the difference between CI( Control Interval)and CA
(Control Area)?
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Answer / kalyan rakesh
VSAM groups logical records into blocks called control
interval.
control intervals are inturn grouped into control areas.
A control interval consists of 1)data records
2)free space
3)unused space
4)control information of
a)RDF
b)CIDF
collection of adjacent CI s is CA.
| Is This Answer Correct ? | 15 Yes | 0 No |
Answer / rameez akhtar
In vsam data sets data is stored in CIs & CAs, CI is small
unit and CA is big unit, a ca contain more then one CIs, CI
have four components
Data
CISF
RDF
Free space
CA also have free space in between records, that space is
used when new records added to the data set can not fit in
the free space of CIs.
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / rohan
Area occupied by the vsam cluster is divided into contiguous area called as control interval.
Area occupied by the control interval is known as control area.
| Is This Answer Correct ? | 2 Yes | 0 No |
Hi, I want to create alternate index on VSAM file.my file structure is ex: RoomID pic x(7) R000001 Floor pic a((6) First RoomNo pic x(2) FA1 Occupied(yes/no) pic a(3) Yes Occupied Batch pic x(10). Maths i want to create alternate index on floor,roomno fields.can i create alternate index on both the fields.and tell me how to create.
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