Preparation for Recitation 26
Thursday, May 17
The final 6.033 recitation discusses Butler Lampson's classic
paper
Hints for Computer System Design . This paper presents
about two dozen general rules of thumb that experienced system
designers have found helpful in building functional,
fault-tolerant systems with acceptable performance. Some of
Lampson's rules may seem obvious to you. Don't be misled by their
apparent simplicity: they embody deep ideas, and it is all too
easy to forget them while in the throes of a project. (And even if
they are obvious, they are well worth collecting and repeating.)
Start out by reading the conclusion of the paper, and then follow
the advice in its first sentence: read the paper in small pieces,
over time, so that you can fully absorb its lessons. You will get
less from the paper if you read it all at once.
You are likely to be unfamiliar with many of the systems discussed
in the examples. It is not necessary to understand every example,
but you should understand in detail at least one of the examples
for each hint. Then, for each hint you should think of at least
one example of a use (and perhaps also a misuse) of the hint from
one of the readings. In addition, think about your design
projects: how did you follow (or not) the hints? You might also
think about when the hints are not applicable, and how you can
tell when that is the case. Overall, the collection of hints
should help you to synthesize the lessons you have learned during
the semester.
If you have taken 6.170, you will notice that many of the hints
are similar to, or identical to, those presented in 6.170. This is
another example of the close relationship between 6.170 and 6.033.
6.033 and 6.170 are both about the construction of computer
systems (even though they choose different details for close
scrutiny), so the primary problems and techniques for avoiding
those problems are similar.
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