The filesystem which gets my vote for most undeservedly popular is ext3, and it has a hard limit of 32,000 entries in a directory. Many other filesystems (even ones that I like more than I like ext3) have either hard limits or bad performance consequences or weird edge cases when you get too many entries in a single directory.
This patch makes it so that there is a layer of intermediate directories between the "shares" directory and the actual storage-index directory (the one whose name contains the entire storage index (z-base-32 encoded) and which contains one or more share files named by their share number).
The intermediate directories are named by the first 14 bits of the storage index, which means there are at most 16384 of them. (This also means that the intermediate directory names are not a leading prefix of the storage-index directory names -- to do that would have required us to have intermediate directories limited to either 1024 (2-char), which is too few, or 32768 (3-chars of a full 5 bits each), which would overrun ext3's funny hard limit of 32,000.))
This closes#150, and please see the "convertshares.py" script attached to #150 to convert your old tahoe-0.7.0 storage/shares directory into a new tahoe-0.8.0 storage/shares directory.
We have a desire to collect runtime statistics from multiple nodes primarily
for server monitoring purposes. This implements a simple implementation of
such a system, as a skeleton to build more sophistication upon.
Each client now looks for a 'stats_gatherer.furl' config file. If it has
been configured to use a stats gatherer, then it instantiates internally
a StatsProvider. This is a central place for code which wishes to offer
stats up for monitoring to report them to, either by calling
stats_provider.count('stat.name', value) to increment a counter, or by
registering a class as a stats producer with sp.register_producer(obj).
The StatsProvider connects to the StatsGatherer server and provides its
provider upon startup. The StatsGatherer is then responsible for polling
the attached providers periodically to retrieve the data provided.
The provider queries each registered producer when the gatherer queries
the provider. Both the internal 'counters' and the queried 'stats' are
then reported to the gatherer.
This provides a simple gatherer app, (c.f. make stats-gatherer-run)
which prints its furl and listens for incoming connections. Once a
minute, the gatherer polls all connected providers, and writes the
retrieved data into a pickle file.
Also included is a munin plugin which knows how to read the gatherer's
stats.pickle and output data munin can interpret. this plugin,
tahoe-stats.py can be symlinked as multiple different names within
munin's 'plugins' directory, and inspects argv to determine which
data to display, doing a lookup in a table within that file.
It looks in the environment for 'statsfile' to determine the path to
the gatherer's stats.pickle. An example plugins-conf.d file is
provided.
fix the make-confwiz-match-installer-size changes, to eliminate some weird
layout/rendering bugs. also tweaked the layout slightly to add space between
the warning label and the newsletter subscribe checkbox.
this will write an arbitrary number of config files, instead of being restricted
to just the introducer.furl, based on the response of the php backend.
the get_config is passed username/password
Previously, once the node itself was launched, the UI event loop was no longer
running. This meant that the app would sit around seemingly 'wedged' and being
reported as 'Not Responding' by the os.
This chnages that by actually implementing a wxPython gui which is left running
while the reactor, and the node within it, is launched in another thread.
Beyond 'quit' -> reactor.stop, there are no interactions between the threads.
The ui provides 'open web root' and 'open account page' actions, both in the
file menu, and in the (right click) dock icon menu.
Something weird in the handling of wxpython's per-frame menubar stuff seems to
mean that the menu bar only displays the file menu and about etc (i.e. the items
from the wx menubar) if the focus changes from and back to the app while the
frame the menubar belongs to is displayed. Hence a splash frame comes up at
startup to provide an opportunity.
It also seems that, in the case that the file menu is not available, that one
can induce it to reappear by choosing 'about' from the dock menu, and then
closing the about window.
