-0.3
+0.6 [???]
+ - SNAPSHOT FORMAT CHANGE: A few minor tweaks have been made to the
+ snapshot format. There is nothing substantial--this is primarily
+ a cleaning up of the format before use becomes more widespread.
+ An efficient and explicit means for representing sparse files has
+ been added to the format. Updated tools will be needed to
+ properly understand the new snapshots. Tools will continue to be
+ able to read the old snapshot format.
+ - LOCAL DATABASE CHANGE: The local database has been changed so that
+ segment utilization data for past snapshots is stored more
+ efficiently. The script in contrib/upgrade0.6-localdb.sql must be
+ run on a database to upgrade it prior to running backups with the
+ new tool.
+ - The statcache implementation has been reworked, and the format
+ changed. The first backup will run more slowly since the old
+ statcache data will be ignored. New statcache data will be
+ written to statcache2. The old statcache file can be deleted.
+ - Metadata is shared between snapshots where possible. The
+ --full-metadata option can be used to disable this (completely
+ writing out all metadata with the new snapshot).
+ - Add an "intent" field to snapshots, which specifies informally how
+ long a snapshot is intended to be kept. For example, 1 can be
+ used for daily snapshots, and 7 for weekly snapshots. Segment
+ cleaning is now partly guided by intent values, but tuning of the
+ cleaning algorithms is not yet finished.
+
+0.5.1 [2007-11-13]
+ - Have the lbs-util tool check the version number when reading a
+ snapshot, and signal an error if the format is not recognized.
+ - Include a sample script, contrib/parity-gen, for creating
+ RAID-like parity sets to recover from some segment corruption.
+ The par2 command (http://parchive.sourceforge.net/) is used to
+ actually generate the parity sets; the parity-gen script simply
+ automates maintaining the parity sets.
+
+0.5 [2007-10-16]
+ - Much improved Python interface for accessing and manipulating LBS
+ archives and local database information. The interface should not
+ yet be considered completely stable.
+ - Python implementation of lbs-util now includes most of the
+ features of the Perl implementation, plus some other new features.
+ The Perl library and utility are deprecated and have been removed
+ from this release.
+ - Preliminary snapshot restore support in lbs-util. This is still
+ not yet extensively tested.
+
+0.4 [2007-08-24]
+ - Documentation improvements: a getting started README, and a
+ description of some of the implementation details.
+ - Include an example filter script, lbs-filter-gpg, for encrypting
+ segment data as it is written.
+ - Add support for signed snapshot descriptor files (via the
+ --signature-filter option). Due to the checksums contained in the
+ snapshot descriptor, the signature covers the entire contents of
+ the snapshot.
+ - Preview release of lbs-util.py, a Python-based program for
+ managing LBS snapshots. It currently implements a very simple
+ form of automatic segment cleaning, though this isn't much tested.
+ - Improved segment repacking support; after cleaning segments,
+ objects can be written out in different groups based on age. This
+ may help with long-term segment cleaning efficiency, but probably
+ needs more tuning.
+
+0.3 [2007-08-10]
- LOCAL DATABASE CHANGE: A checksums file is now written out along
with the snapshot descriptor that contains checksums of segments
used in a snapshot. This will allow quick integrity checks of a
- Bugfix: File descriptors of files being backed up were closed
twice. In some cases this might have led to an unrelated file
being closed (if the file descriptor was quickly re-used).
+ - Preview of a new lbs-util command for maintaining snapshots.
+ Functionality is currently limited.
0.2.2 [2007-07-27]
- Update reference restore.pl script to handle octal/hexadecimal
projects / cumulus.git / blobdiff