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VSAM Questions

 
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arnoldsanthosh

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Joined: 12 Jan 2006
Posts: 2

PostPosted: Fri Feb 03, 2006 2:47 pm    Post subject: VSAM Questions
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Can you please help me to find the answers of these VSAM questions

*************************************************************
CI size information: CI sizes are in increments of 512 bytes up to 8192 bytes, so the possible sizes are 512, 1024, 1536, 2048, 2560, 3072,3584, and 4096 bytes.
Data information: The fixed record length is 250 bytes; 150,000 records are to load initially,free space is 15%. Disk information: 15 tracks per cylinder; 47,476 bytes per track.Given the above information, which one of the following would be the optimum CI size for the data set that will be used online?

Answer 1
512
Answer 2
1024
Answer 3
2048
Answer 4
3072
Answer 5
4096

*************************************************************
A KSDS data set has fixed length 250 byte records. The initial load will have approximately 100,000 records. It is estimated that the insertion rate per day will be 15% evenly spread across the key range.
The file is used online, so the largest CI size is 4096, which in this case, is also the most efficient.Using the information above, at least how many bytes will be lost per CI?
Answer 1
23
Answer 2
48
Answer 3
86
Answer 4
102
Answer 5
148

*************************************************************
A KSDS data set is to hold 100,000 records on the initial load. The records are fixed length,250 bytes. There are 139 CIs per CA and a CI is 4,096 bytes.
Given the above information, what percentage should the free space option be set to in order allow insertion of 15% more records in each CI?

Answer 1
6%
Answer 2
12%
Answer 3
18%
Answer 4
24%
Answer 5
30%

*************************************************************
The VSAM KSDS space allocation needs to accommodate 100,000 records of 500 bytes each. The disk storage capacity is 712,000 bytes per cylinder and there are 15 tracks per cylinder. Free space is 5% for both CI and CA. Expected insertion rate is 1,500 records per day.
Based on the above scenario, during the file definition, which one of the following would produce the most efficient CA size?

Answer 1
Cylinders (90 20)
Answer 2
Tracks (1350 10)
Answer 3
Records (125000 500)
Answer 4
Records (100000 1000)
Answer 5
There is insufficient information provided.

*************************************************************
VSAM uses some of each CI for control information. The amount of that overhead is different for fixed length records, variable length records, and one fixed length record per CI. Referring to the above information, which one of the following choices contains the correct minimum lengths used by VSAM for its overhead for fixed, variable, and one record per CI,
respectively?

Answer 1
4, 7, 10
Answer 2
10, 10, 8
Answer 3
10, 10, 7
Answer 4
10, 8, 4
Answer 5
7, 10, 10

*************************************************************
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arnoldsanthosh

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Joined: 12 Jan 2006
Posts: 2

PostPosted: Thu Feb 09, 2006 2:21 pm    Post subject: Re: VSAM Questions
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Hi Friends,

Pls throw some light to find the answer.....any formula's...
Hope i will get some info...
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