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Data Sets Assignment

Notes on Sample Data Sets

Data Sets

There are 6 data sets. Each set has a pair of file, P1 and S1, P2 and S2, etc. P1, P2, etc. contain data about products, and S1, S2, etc. contain data about sales. File S6 is split into two because its size exceeds the size allowed by LMS.

All data sets are correct data sets, except for P1E.txt (which contains an error)

Set

Number of Products

Number of

Sales

Maximum

Number of

Item Per Sale

Remarks

P1, S1

10

4

Tiny data set. You can inspect the data to verify your results

P2, S2

10

10

8

Small data set. Some of the top five lists have less than 5 products, some have more.

P3, S3

1000

10, 000

10

Should take a few seconds to run.

P4, S4

10,000

100,000

10

Likely to require more memory (than the default) to run. Request more memory with

java –Xmx300m SaleInfoMiner …

P5, S5

10,000

500,000

10

Likely to require about 800MB to run (depending on your program)

P6, S6

15,000

1000,000

10

Likely to require about 1500MB to run.

S6 is too big for LMS (> 100KB), so it is split into Part1 and Part2

How to use the test data sets

  1. Do NOT run your programs on latcs6.

Run them on one of the simula servers (simula1, simulal2, etc)

If you run your program with the larger data sets on latcs6, you may slow down the server so much that it prevents other students on latcs6 from doing their work

  1. You would log in and run your programs on simula the way you do it on latcs6.
  1. To request more memory for Java execution, issue, for example:

java –Xmx300m SaleInfoMiner … … … …

  1. To save disk space, do not copy the larger data sets to your own area.
  2. You can copy the data sets to use on your own PC’s.
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