[tahoe-lafs-trac-stream] [Tahoe-LAFS] #3549: Remove the stats gatherer and supporting code

[Tahoe-LAFS]

#3549: Remove the stats gatherer and supporting code
---------------------+---------------------------
 Reporter:  exarkun  |          Owner:
     Type:  defect   |         Status:  new
 Priority:  normal   |      Milestone:  undecided
Component:  unknown  |        Version:  n/a
 Keywords:           |  Launchpad Bug:
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 Since at least 1.13.0 it has not been possible to run the stats gatherer.

 One person did notice this (https://tahoe-lafs.org/trac/tahoe-
 lafs/ticket/2940) but it sounds like a new user, not someone actually
 using the stats gatherer or related functionality in the real world.
 Since there have been no other reports of its breakage, a reasonable
 conclusion seems to be that no one actually uses this functionality.

 Operational visibility into the Tahoe-LAFS software is a very important
 thing for any real deployments and gathering metrics from the software
 itself is likely an essential part of obtaining this visibility.  However,
 a custom stats aggregator custom-built for Tahoe-LAFS is probably not a
 requirement for this.  Instead, there are a number of widely deployed
 third-party systems for collecting such metrics.  Many of them also hook
 into more powerful visualization systems than Munin (which is what all of
 the Tahoe-LAFS stats stuff is geared towards).

 I propose that we re-build Tahoe-LAFS' operational visibility features
 with one of these more powerful systems.

 As a first step in that direction, we should remove all of the existing
 "stats gatherer" and related support code.  This will clear the way for
 new work.  If this were a regression then it would be a bad plan but the
 regression already happened years ago.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3549>
Tahoe-LAFS <https://Tahoe-LAFS.org>
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