18 25 13 2 89 43 66 22 34 17 73 89 10 63 25 45 56 55 63 89 8 15 91 Given data file.

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Presentation transcript:

Given data file

Assume 3 item blocks and 2-block buffers

132518

Sort the items in the buffer with an internal sort

Write the buffer back to disk as a “sublist”

st sublist:

st sublist:

st sublist:

st sublist:

st sublist:

st sublist:

st sublist:

st sublist:

st sublist:

st sublist:

st sublist: nd sublist:

st sublist: nd sublist:

st sublist: nd sublist:

st sublist: nd sublist:

st sublist: nd sublist:

st sublist: nd sublist:

st sublist: nd sublist:

st sublist: nd sublist:

st sublist: nd sublist:

st sublist: nd sublist:

st sublist: nd sublist:

st sublist: nd sublist: rd sublist:

st sublist: nd sublist: rd sublist:

st sublist: nd sublist: rd sublist:

st sublist: nd sublist: rd sublist:

st sublist: nd sublist: rd sublist:

st sublist: nd sublist: rd sublist:

st sublist: nd sublist: rd sublist:

st sublist: nd sublist: rd sublist:

st sublist: nd sublist: rd sublist:

st sublist: nd sublist: rd sublist:

st sublist: nd sublist: rd sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist: “garbage”

st sublist: nd sublist: rd sublist: th sublist: Set up buffers for each sublist (1 block each) and an output buffer

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist: Fill output buffer with current smallest values

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist: Output buffer full; write to disk

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist: st buffer at end; reload it

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist: No more data for this buffer

st sublist: nd sublist: rd sublist: th sublist: Will not be used again

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist:

st sublist: nd sublist: rd sublist: th sublist: End of data reached

st sublist: nd sublist: rd sublist: th sublist:

Sorted data file

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