[darcs-users] "broken" hard links.
Trent W. Buck
trentbuck at gmail.com
Wed Apr 29 03:02:54 UTC 2009
>>>> Short of there being a bug, is there any reason for hashed repos to
>>>> go out of sync?
The following transcript demonstrates this using a concrete example:
the Darcs repo. The working directory is in /tmp, which is a
different filesystem from the cache directory in /home/twb/.darcs/cache.
$ map darcs get http://darcs.net/ --quiet --complete -- R S
$ map du -- -sm -sml
81 .
81 .
The numbers are the same, so at this point there is NO hard linking.
$ darcs optimize --repo R --sibling S --relink
Done optimizing!
$ map du -- -sm -sml
49 .
81 .
And now optimize has hard linked. Now we pull twice, independently
from a different filesystem, which prevents Darcs from automatically
hard-linking. Pulling from a remote repo would be the same.
$ darcs pull --repo R --quiet --all ~/darcs+twb
$ darcs pull --repo S --quiet --all ~/darcs+twb
$ map du -- -s -sl
50092 .
82500 .
$ darcs optimize --repo R --sibling S --relink
Done optimizing!
$ map du -- -s -sl
49916 .
82380 .
$
Optimize --relink has reduced the space taken, so clearly the
independent pulls resulted in broken (i.e. potential) hard links.
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