Re: [9fans] some shell scripts

[geoff@collyer.net]

One could start lnfs early in cpurc and termrc, have it post a /srv
file, and have /lib/namespace* mount that /srv file.  I think that for
the sort of thing you described (with Beagle), creations and removals
are of primary interest, though one could watch for writes too.
Keeping a database or log of such changes (perhaps served from the
watcher file server, permitting some in-memory caching) is vastly
cheaper than statting a potentially huge set of files every second
(though the difference would be even bigger on (l)unix, with the
directory entries separated from the i-nodes).  One should be able to
just note the new file name, size and perhaps mtime of each write, so
the volume of data should be tolerable.  If you're building indices, a
watcher client would probably want to wait for a given file to be
closed and perhaps wait a little longer in case it's rewritten, then
index it.  Maybe index every changed file each hour, or something of
the sort.

I don't think the need kernel mods for this.