OpenTSDB 2.3.0 RC1

• Version 2.3.0 RC1 (2016-05-02)

Noteworthy Changes:

• Introduced option --max-connection/tsd.core.connections.limit to set the maximum number
  of connection a TSD will accept (#638)
• 'tsdb import' can now read from stdin (#580)
• Added datapoints counter (#369)
• Improved metadata storage performance (#699)
• added checkbox for showing global annotations in UI (#736)
• Added startup plugins, can be used for Service Discovery or other integration (#719)
• Added MetaDataCache plugin api
• Added timeshift() function (#175)
• Now align downsampling to Gregorian Calendar (#548, #657)
• Added None aggregator to fetch raw data along with first and last aggregators to
  fetch only the first or last data points when downsampling.
• Added script to build OpenTSDB/HBase on OSX (#674)
• Add cross-series expressions with mathematical operators using Jexl
• Added query epxressions (alias(), scale(), absolute(), movingAverage(), highestCurrent(),
  highestMax(), timeShift(), divide(), sum(), difference(), multiply()) (#625)
• Add a Unique ID assignment filter API for enforcing UID assignment naming conventions.
• Add a whitelist regular expression based UID assignment filter
• Add a time series storage filter plugin API that allows processing time series data
  and determining if it should be stored or not.
• Allow using OpenTSDB with Google's Bigtable cloud platform or with Apache Cassandra

Bug Fixes:

• Some improperly formatted timestamps were allowed (#724)
• Removed stdout logging from packaged logback.xml files (#715)
• Restore the ability to create TSMeta objects via URI
• Restore raw data points (along with post-filtered data points) in query stats
• Built in UI will now properly display global annotations when the query string is passed

OpenTSDB 2.2.0

• Version 2.2.0 (2016-02-14)
  • Add the option to randomly assign UIDs to metrics to improve distribution across
    HBase region servers.
  • Introduce salting of data to improve distribution of high cardinality regions
    across region servers.
  • Introduce query stats for tracking various timings related to TSD queries.
  • Add more stats endpoints including /threads, /jvm and /region_clients
  • Allow for deleting UID mappings via CLI or the API
  • Name the various threads for easier debugging, particularly for distinguishing
    between TSD and AsyncHBase threads.
  • Allow for pre-fetching all of the meta information for the tables to improve
    performance.
  • Update to the latest AsyncHBase with support for secure HBase clusters and RPC
    timeouts.
  • Allow for overriding metric and tag widths via the config file. (Be careful!)
  • URLs from the API are now relative instead of absolute, allowing for easier reverse
    proxy use.
  • Allow for percent deviation in the Nagios check
  • Let queries skip over unknown tag values that may not exist yet (via config)
  • Add various query filters such as case (in)sensitive pipes, wildcards and pipes
    over tag values. Filters do not work over metrics at this time.
  • Add support for writing data points using Appends in HBase as a way of writing
    compacted data without having to read and re-write at the top of each hour.
  • Introduce an option to emit NaNs or Nulls in the JSON output when downsampling and
    a bucket is missing values.
  • Introduce query time flags to show the original query along with some timing stats
    in the response.
  • Introduce a storage exception handler plugin that will allow users to spool or
    requeue data points that fail writes to HBase due to various issues.
  • Rework the HTTP pipeline to support plugins with RPC implementations.
  • Allow for some style options in the Gnuplot graphs.
  • Allow for timing out long running HTTP queries.
  • Text importer will now log and continue bad rows instead of failing.
  • New percentile and count aggregators.
  • Add the /api/annotations endpoint to fetch multiple annotations in one call.
  • Add a class to support improved bulk imports by batching requests in memory for a
    full hour before writing.
  • Allow overriding the metric and tag UID widths via config file instead of
    having to modify the source code.
  • Rework the QueryStats output to be a bit more useful and add timings from the
    various scanners and query components.
  • Modify the UI to allow for group by or aggregate per tag (use the new query feature)
  • Rework the UI skin with the new TSDB logo and color scheme.
  • Add the QueryLog config to logback.xml so users can optionally enable logging of
    all queries along with their stats.

OpenTSDB 2.1.4

• Version 2.1.4 (2016-02-14)

Bug Fixes:

• Fix the meta table where the UID/TSMeta APIs were not sorting tags properly
  prior to creating the row key, thus allowing for duplicates if the caller changed
  the order of tags.
• Fix a situation where meta sync could hang forever if a routine threw an exception.
• Fix an NPE thrown when accessing the /logs endpoint if the Cyclic appender is not
  enabled in the logback config.
• Remove an overly chatty log line in TSMeta on new time series creation.

OpenTSDB 2.2.0 RC3

• Version 2.2.0 RC3 (2015-11-11)

Bug Fixes:

• Fix build issues where the static files were not copied into the proper location.

OpenTSDB 2.1.3

• Version 2.1.3 (2015-11-11)

Bug Fixes:

• Fix build issues where the static files were not copied into the proper location.

OpenTSDB 2.2.0 RC2

• Version 2.2.0 RC2 (2015-11-09)

Noteworthy Changes:

• Allow overriding the metric and tag UID widths via config file instead of
  having to modify the source code.

Bug Fixes:

• OOM handling script now handles multiple TSDs installed on the same host.
• Fix a bug where queries never return if an exception is thrown from the
  storage layer.
• Fix random metric UID assignment in the CLI tool.
• Fix for meta data sync when salting is enabled.

OpenTSDB 2.1.2

Bug Fixes:

• Fix the built-in UI to handle query parameter parsing properly (found when Firefox
  changed their URI behavior)
• Fix comments about the Zookeeper quorum setting in various config files.
• Fix quoting in the Makefile when installing.
• Make sure builds write files in the proper location on FreeBSD.

OpenTSDB 2.2.0 RC1

• Version 2.2.0 RC1 (2015-09-12)

Noteworthy Changes:

• Add the option to randomly assign UIDs to metrics to improve distribution across
  HBase region servers.
• Introduce salting of data to improve distribution of high cardinality regions
  across region servers.
• Introduce query stats for tracking various timings related to TSD queries.
• Add more stats endpoints including /threads, /jvm and /region_clients
• Allow for deleting UID mappings via CLI or the API
• Name the various threads for easier debugging, particularly for distinguishing
  between TSD and AsyncHBase threads.
• Allow for pre-fetching all of the meta information for the tables to improve
  performance.
• Update to the latest AsyncHBase with support for secure HBase clusters and RPC
  timeouts.
• Allow for overriding metric and tag widths via the config file. (Be careful!)
• URLs from the API are now relative instead of absolute, allowing for easier reverse
  proxy use.
• Allow for percent deviation in the Nagios check
• Let queries skip over unknown tag values that may not exist yet (via config)
• Add various query filters such as case (in)sensitive pipes, wildcards and pipes
  over tag values. Filters do not work over metrics at this time.
• Add support for writing data points using Appends in HBase as a way of writing
  compacted data without having to read and re-write at the top of each hour.
• Introduce an option to emit NaNs or Nulls in the JSON output when downsampling and
  a bucket is missing values.
• Introduce query time flags to show the original query along with some timing stats
  in the response.
• Introduce a storage exception handler plugin that will allow users to spool or
  requeue data points that fail writes to HBase due to various issues.
• Rework the HTTP pipeline to support plugins with RPC implementations.
• Allow for some style options in the Gnuplot graphs.
• Allow for timing out long running HTTP queries.
• Text importer will now log and continue bad rows instead of failing.
• New percentile and count aggregators.
• Add the /api/annotations endpoint to fetch multiple annotations in one call.
• Add a class to support improved bulk imports by batching requests in memory for a
  full hour before writing.

Bug Fixes:

• Modify the .rpm build to allow dashes in the name.
• Allow the Nagios check script to handle 0 values properly in checks.
• Fix FSCK where floating point values were not processed correctly (#430)
• Fix missing information from the /appi/uid/tsmeta calls (#498)
• Fix more issues with the FSCK around deleting columns that were in the list (#436)
• Avoid OOM issues over Telnet when the sending client isn't reading errors off it's
  socket fast enough by blocking writes.

OpenTSDB 2.1.1

• Version 2.1.1 (2015-09-12)

Bug Fixes:

• Relax the pgrep regex to correctly find and kill the java process in the RPM init.d
  script.
• Improve query performance slightly when aggregating multiple series.
• Fix the /api/search/lookup API call to properly handle the limit parameter.
• Fix the /api/query/last endpoint to properly handle missing tsdb-meta tables.

OpenTSDB 2.1.0

• Version 2.1.0 (2015-05-06)

Bug Fixes:

• FSCK was not handling compacted and floating point duplicates properly. Now they
  are merged correctly.
• TSMeta data updates were not loading the latest data from storage on response
• The config class will now trim spaces from booleans and integers
• On shutdown, the idle state handler could prevent the TSD from shutting down
  gracefully. A new thread factory sets that thread as a daemon thread.
• TSMeta objects were not generated if multiple writes for the same data point arrived
  in succession due to buffering atomic increments. Increments are no longer buffered.
• Updated paths to the deprecated Google Code repo for dependencies.