[tahoe-lafs-trac-stream] [tahoe-lafs] #1430: drop-upload: handle inotify queue overflow correctly

[tahoe-lafs]

#1430: drop-upload: handle inotify queue overflow correctly
---------------------------------+----------------------------
 Reporter:  davidsarah           |          Owner:  davidsarah
     Type:  defect               |         Status:  new
 Priority:  major                |      Milestone:  eventually
Component:  code-frontend        |        Version:  1.8.2
 Keywords:  drop-upload inotify  |  Launchpad Bug:
---------------------------------+----------------------------
 The inotify API has a maximum number of queued events, controlled by
 {{{/proc/sys/fs/inotify/max_queued_events}}}. This could affect the
 reliability of the drop-upload feature (#1429) in detecting all file-
 change events when a large number of files in the local directory are
 modified. In principle it could detect this using the IN_Q_OVERFLOW event,
 and rescan all files in the directory to see whether they were last-
 modified since the timestamp of the previous event (assuming that we trust
 the last-modified timestamps).

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Ticket URL: <http://tahoe-lafs.org/trac/tahoe-lafs/ticket/1430>
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