Fix a bug in computing the size of a segment that led to utilization > 1.0.

[cumulus.git] / NEWS

diff --git a/NEWS b/NEWS
index 9b8ab0a..32bea66 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -1,10 +1,56 @@
-0.4?
+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.
+      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.
+
+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