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

name the utility program closely associated with vsam?

0 Answers   IBM,

---

How do you convert flat files to VSAM files ?

5 Answers   EDS, IBM,

---

Alt key is used for what type of vsam file

3 Answers  

---

what is the use of aix in vsam why do we go for aix and wht is build index in vsam?

5 Answers   HCL, IBM,

---

What is a path?

1 Answers  

---

Yes. Because the alternate key would first locate the primary key, which in turn locates the actual record. Needs twice the number of I/Os.

0 Answers  

---

Describe the uses of ams?

0 Answers  

---

what is the difference between vsam and dataset how do u create vsam dataset which file you r used?

2 Answers   Fidelity,

---

What is SHAREOPTS ?

2 Answers  

---

Is a delete operation possible in an ESDS?B. Is rewrite operation possible in ESDS ?

3 Answers  

---

In a KSDS file, key is missing for one record. How to insert the key for that particular record from back up file. Is there any sorting needed for the back up file before the key insertion?

0 Answers   RBS,

---

there are seven idcams commands in vsam. Can you name and explain each of them?

0 Answers   IBM,

---