[trondheim-pts] Downloading Caching Support
michael.larabel at phoronix.com
Mon May 5 09:02:16 CDT 2008
Following the 0.5.1 release this morning, download caching support for
the Phoronix Test Suite has been pushed into the git tree
caching support is ideal for users with multiple systems or for users
just wishing to backup their downloaded files in order to save bandwidth
in the future.
By running "*phoronix-test-suite make-download-cache*", it will copy all
files downloaded locally by the Phoronix Test Suite and places them
inside *~/.phoronix-test-suite/download-cache* by default. However, you
can override this location using the *DOWNLOAD_CACHE* environmental
variable. By running *DOWNLOAD_CACHE=~/downloads/ phoronix-test-suite
make-download-cache* it will save the files to ~/downloads/ and likewise
if running *DOWNLOAD_CACHE=~/downloads/ phoronix-test-suite install
universe*, it will use this custom directory for obtaining files
previously downloaded. It's hooked in where if the file can be found in
the cache and its MD5 sum is verified, it will just copy that file
instead of downloading it from the Internet. Running make-download-cache
on an existing cache will just update the files where the MD5s have
changed or where the files were previously not downloaded.
This feature relies upon the recent downloads.xml introduction for the
test profiles, in order to manage the download URLs and MD5 check-sums.
In addition, through the downloads.xml file it can determine what files
have been downloaded (instead of files in turn being extracted from a
downloaded file or created by one of the test scripts).
Previously you could have (and still could) just copied the
~/.phoronix-test-suite/installed-tests/ directory to another PC or
backup medium, but I don't view that as a viable. In the copying process
some files could be corrupted, file permissions changed, and it would
just take immensely longer to do since *everything* is then being
copied. Here if you just make the download cache and then copy the
resulting directory to another test system, it's just the downloaded and
compressed files, so it takes up less room, is a much cleaner process,
and eliminates many headaches.
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