A database table T1 has 2000 records and occupies 80 disk blocks. Another table T2 has 400 records and occupies 20 disk blocks. These two tables have to be joined as per a specified join condition that needs to be evaluated for every pair of records from these two tables. The memory buffer space available can hold exactly one block of records for T1 and one block of records for T2 simultaneously at any point in time. No index is available on either table.

A database table T1 has 2000 records and occupies 80 disk blocks. Another table T2 has 400 records and occupies 20 disk blocks. These two tables have to be joined as per a specified join condition that needs to be evaluated for every pair of records from these two tables. The memory buffer space available can hold exactly one block of records for T1 and one block of records for T2 simultaneously at any point in time. No index is available on either table.

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Question

Same question 6.8 next part.

A database table T1 has 2000 records and occupies 80
disk blocks. Another table T2 has 400 records and
occupies 20 disk blocks. These two tables have to be
joined as per a specified join condition that needs to be
evaluated for every pair of records from these two tables.
The memory buffer space available can hold exactly
one block of records for T1 and one block of records for
T2 simultaneously at any point in time. No index is
available on either table.

If, instead of Nested-loop join, Block nested-loop
join is used, again with the most appropriate
choice of table in the outer loop, the reduction in
number of block accesses required for reading
the data will be

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