![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
diff --git a/ReleaseNotes b/ReleaseNotes
index fa9c85a4a67b97268f028448b775900386263b98..3227a66d513d1ce96007e262603226629185ae56 100644 (file)
--- a/ReleaseNotes
+++ b/ReleaseNotes
Object names are canonicalized before they are added to the store to ensure
a consistent view of your infrastructure.
- <http://sysdb.io/>
+ <https://sysdb.io/>
+
+Version 0.3.0, Release Date: 2014-08-01
+---------------------------------------
+
+ This release includes major enhancements and new features in the SysDB store
+ which is the core of the database. Most notably, complex expressions are now
+ supported when looking up information and filters may be used to preselect
+ the information to be returned. Some backward-incompatible changes were
+ introduced in the query language to avoid potentially confusing semantics.
+
+ * sysdb: Fixed non-interactive mode when using libedit.
+ * core:
+ - Fixed weird behavior when collector callbacks were registered without
+ any plugin context information (as it would, e.g., happen when using
+ LoadPlugin instead of LoadBackend in sysdbd).
+ * store:
+ - Introduced service attributes -- similar to host attributes but
+ assigned to a service object.
+ - Don't log “value too old” messages if an updated object uses the same
+ timestamp as the old object.
+ - Switched from linked-lists to AVL trees for storing all object types to
+ reduce lookup times from O(n) to O(log n).
+ - Added infrastructure for handling and evaluating arithmetic
+ expressions and filters (see also the changes to the query language
+ below).
+ - Export various fields describing base attributes of all stored object
+ types: last_update, age, interval, and backend. These fields may be
+ used when querying the store.
+ * frontend: Include new service attributes in JSON output.
+ * query language:
+ - Added support for ‘IS NULL’ attribute checks matching on non-existent
+ attributes.
+ - Changed ‘LOOKUP ... WHERE’ queries to ‘LOOKUP ... MATCHING’ to avoid
+ confusion with SQL semantics.
+ - Switched from ‘<obj>.name’ to ‘<obj>’ in MATCHING clauses, thus, no
+ longer shadowing attributes called “name”.
+ - Added support for arithmetic expressions in places that used simple
+ data values before. Arithmetic expressions support addition,
+ subtraction, multiplication, division, modulo, and concatenation
+ operations. The expressions may be based on constant values or
+ queryable fields of the stored objects (specified as ‘:last_update’,
+ ‘:age’, ‘:interval’, and ‘:backend’).
+ - Added ‘FILTER’ support to ‘LOOKUP’ queries. Filters are conditional
+ expressions which may optionally be used to limit the query and the
+ result to object (of any type) matching the filter condition.
+ - Added support to specify date and time values.
+ * utils:
+ - avltree: Added an AVL tree (self-balancing binary tree) implementation.
+ * documentation: Added documentation for the new query language features.
+ * testing: Run all unit tests through valgrind by default (if available).
+
+ Backends:
+ * collectd::unixsock:
+ - Added support for spaces in identifiers.
+ - Store plugin identifier (host, plugin, plugin_instance, type,
+ type_instance) as service attributes.
+
+Version 0.2.0, Release Date: 2014-07-01
+---------------------------------------
+
+ This is another development snapshot of SysDB. The main focus of this
+ release is on stabilizing existing features and extending the query
+ infrastructure to support all attribute types and further operators.
+
+ * build system: Fixed linking of sysdbd to include *all* necessary object
+ files. This bug caused some plugins to be un-loadable.
+ * sysdbd: Fixed shutdown process in case of errors.
+ * sysdb: Fixed a bug causing some server replies to be ignored when exiting
+ from the client.
+ * core:
+ - Always log to the standard output stream if no user-provided logging
+ callbacks had been specified. Previously this was disabled after
+ enabling logging to clients in the frontend.
+ - Simplified plugin naming information and determine configuration
+ callback names automatically to ensure better consistency.
+ * store:
+ - Simplified internal data management.
+ - Store the list of backends along with each stored object which provide
+ the respective object.
+ * frontend:
+ - Simplified and improved the internal architecture matching / looking up
+ objects.
+ - Fixed parser to correctly reject invalid object types.
+ - Automatically create the base directory of a listening UNIX socket.
+ * query language: Added support for numeric constants and added operators
+ for less and greater than or equal attribute comparison.
+ * documentation: Added missing files to the distribution tarball.
+
+ Plugins:
+ * syslog: Don't log debug messages to syslog.
Version 0.1.0, Release Date: 2014-06-01
---------------------------------------