Answer / sanjudharan

Control Interval is analogous to a physical block for QSAM
files. It is the unit of i/o. Must be between 512 bytes to
32 k. Usually either 2K or 4K. A larger control interval
increases performance for sequential processing while the
reverse is true for random access. Under CICS when a record
is locked, the entire CI gets locked.

Control area is a group of control intervals. CA is used
during allocation. CA size is calculated based on the
allocation type (cyl, tracks or records) and can be max of
1 cylinder

can alternate index use in ESDS since it does not contain primary index? if yes can you explain?

3 Answers   Temenos,

---

How to get the last record in vsam file in cluster?

0 Answers  

---

Under IDCAMS , multiple functions can be executed, each of which returns a cond code. What will be the condition code returned to the operating system ?

1 Answers   IBM,

---

in vsam at the creation of cluster what is the use of RECSZ parameter?

2 Answers   TCS,

---

There are at least seven IDCAMS commands; name and explain each of them ?.

1 Answers  

---

what will happen when you try to open an empty vsam file in a cobol program for input?

0 Answers   IBM,

---

In a file(PS), we dont know how many records are there. requirement is divide half n half the records n insert into 2 another files(PS).

6 Answers   Cap Gemini, TCS,

---

What is a CA, control area?

1 Answers  

---

Using Alternate Indexes in CICS pgms: ?

1 Answers  

---

What is a cluster?

2 Answers  

---

What is the purpose of control intervals in vsam?

0 Answers  

---

What are the advantages of vsam over isam?

0 Answers  

---