[tahoe-lafs-trac-stream] [tahoe-lafs] #1432: drop-upload on Mac OS X and other BSDs (was: drop-upload on Mac OS X)

[tahoe-lafs]

#1432: drop-upload on Mac OS X and other BSDs
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     Reporter:  davidsarah     |      Owner:
         Type:  defect         |     Status:  new
     Priority:  major          |  Milestone:  undecided
    Component:  code-frontend  |    Version:  1.8.2
   Resolution:                 |   Keywords:  drop-upload fsevents mac bsd
Launchpad Bug:                 |
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Changes (by davidsarah):

 * keywords:  drop-upload fsevents mac => drop-upload fsevents mac bsd


Old description:

> The drop-upload feature (#1429) uses inotify to detect filesystem
> changes, and therefore works only on Linux. This ticket is about
> supporting the same feature on Mac OS X, probably using
> [http://en.wikipedia.org/wiki/FSEvents fsevents]. However, fsevents does
> not give notifications of which files have changed, so the implementation
> will have to scan the directory and look at last-modified times to
> determine that. (This is occasionally also necessary for correctness on
> Linux; see #1430.)

New description:

 The drop-upload feature (#1429) uses inotify to detect filesystem changes,
 and therefore works only on Linux. This ticket is about supporting the
 same feature on Mac OS X and possibly other BSD-based operating systems.
 Mac OS X has the [http://en.wikipedia.org/wiki/FSEvents fsevents], and all
 BSDs including Mac OS X have kqueue/kevent. If I understand correctly,
 neither fsevents nor kqueue/kevent give notifications of which files have
 changed, so the implementation will have to scan the directory and look at
 last-modified times to determine that. (This is occasionally also
 necessary for correctness on Linux; see #1430.)

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Ticket URL: <http://tahoe-lafs.org/trac/tahoe-lafs/ticket/1432#comment:1>
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