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Wed Nov 30 10:50:23 EST 2016

Commutation - migration vs caches

Find some more examples of this commutation, and how to manage it
better.

modify source, then recompile what is necessary (make)
automated update of modified binaries (apt-get upgrade)

EDIT: The commutation here is the tradeoff between rebuilding and transfer.

- Transfer seed, then (possibly incrementally) rebuild
- Transfer cache (possibly incrementally)

Speedup comes from the incremental bit, but the diagram is different.
Ideally, the location of the incremental step should be automatable,
but that is the part that is often not possible just due to
complexity of the build chain.



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