USENIX Annual Technical Conference (NO 98), 1998
Transparent Result Caching
Amin Vahdat, University of California, Berkeley
Thomas Anderson, University of Washington
The goal of this work is to develop a general framework
for transparently managing the interactions and dependencies
among input files, development tools, and output
files. By unobtrusively monitoring the execution
of unmodified programs, we are able to track process
lineage - each process's parent, children, input files, and
output files, and file dependency - for each file, the sequence
of operations and the set of input files used to
create the file. We use this information to implement
Transparent Result Caching (TREC) and describe how
TREC is used to build a number of useful user utilities.
Unmake allows users to query TREC for file lineage
information, including the full sequence of pro-grams
executed to create a particular output file. Transparent
Make uses TREC to automatically generate dependency
information by observing program execution,
freeing end users from the need to explicitly specify dependency
information (i.e., Makefiles can be replaced by
shell scripts). Dynamic Web Object Caching allows for
the caching of certain dynamically generated web pages,
improving server performance and client latency.
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