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NEWS: finish editing for the upcoming 1.3.0 release

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Brian Warner 2008-09-19 12:30:53 -07:00
parent 3dd131b5dc
commit 1c89208884
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NEWS
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@ -160,19 +160,54 @@ support/bin because Twisted is a dependency of Tahoe).
** Grid Management Tools
stats
include disk-free information
Several tools have been added or updated in the misc/ directory, mostly munin
plugins that can be used to monitor a storage grid.
disk-watcher daemon, uses axiom
spacetime munin plugins: space-used, space-left, time-left/doomsday
tahoe_overhead plugin
The misc/spacetime/ directory contains a "disk watcher" daemon (startable
with 'tahoe start'), which can be configured with a set of HTTP URLs
(pointing at the webapi '/statistics' page of a bunch of storage servers),
and will periodically fetch disk-used/disk-available information from all the
servers. It keeps this information in an Axiom database (a sqlite-based
library available from divmod.org). The daemon computes time-averaged rates
of disk usage, as well as a prediction of how much time is left before the
grid is completely full.
** other
The misc/munin/ directory contains a new set of munin plugins
(tahoe_diskleft, tahoe_diskusage, tahoe_doomsday) which talk to the
disk-watcher and provide graphs of its calculations.
storage declares oldest-supported-version = 1.0
To support the disk-watcher, the Tahoe statistics component (visible through
the webapi at the /statistics/ URL) now includes disk-used and disk-available
information. Both are derived through an equivalent of the unix 'df' command
(i.e. they ask the kernel for the number of free blocks on the partition that
encloses the BASEDIR/storage directory). In the future, the disk-available
number will be further influenced by the local storage policy: if that policy
says that the server should refuse new shares when less than 5GB is left on
the partition, then "disk-available" will report zero even though the kernel
sees 5GB remaining.
The 'tahoe_overhead' munin plugin interacts with an allmydata.com-specific
server which reports the total of the 'deep-size' reports for all active user
accounts, compares this with the disk-watcher data, to report on overhead
percentages. This provides information on how much space could be recovered
once Tahoe implements some form of garbage collection.
** Other Changes
Clients now declare their "oldest-supported version" to be 1.0.0 . This is
part of a backwards-compatibility system that has not yet been fully
specified. Previous releases declared their oldest-supported-version to be
the same as their current version number.
Several bugs have been fixed, including one that would cause an exception (in
the logs) if a webapi download operation was cancelled (by closing the TCP
connection, or pushing the "stop" button in a web browser).
Tahoe now uses Foolscap "Incidents", writing an "incident report" file to
logs/incidents/ each time something weird occurs. These reports are available
to an "incident gatherer" through the flogtool command. For more details,
please see the Foolscap logging documentation.
bugs fixed
download self._paused
* Release 1.2.0 (2008-07-21)