新闻 Crate 0.55.0 发布，数据存储系统 下载

Crate 0.55.0 发布。主要更新内容如下：

• 
  - BREAKING: Units are now required for time or byte based settings in the
  
  `crate.yml` configuration file. Nodes won't start otherwise.
  
  
  
  
• 
  - BREAKING: The `gateway.local.sync` setting has been renamed to
  
  `translog.sync_interval`.
  
  
  
  
• 
  - BREAKING: It is no longer possible to specify the location of the config
  
  file with the `CONF_FILE` environment variable, or the `-Des.config`,
  
  `-Des.default.config`, or `-Delasticsearch.config` parameters.
  
  
• 
  The config file must now be named `crate.yml` and must be located in the
  
  default `config/` directory, in the directory specified in the `CONF_DIR`
  
  environmental variable, or the one specified in the `-Des.path.home`
  
  parameter.
  
  
  
  
• 
  - BREAKING: Crate will die now on all plugin loading errors.
  
  
  
  
• 
  - BREAKING: Column names may not contain the `.` character anymore.
  
  
  
  
• 
  - BREAKING: Tables are not refreshed automatically anymore before and after
  
  a `DELETE-BY-QUERY` operation is applied.
  
  
  
  
• 
  - Upgraded Elasticsearch to 2.3.3
  
  
  
  
• 
  - Updated crate-admin to 0.18.0 which contains following changes:
  
  
  
  
• 
  - Cluster check include now clickable links
  
  
• 
  - Load additional links in menu dynamically from news feed
  
  
• 
  - Fixed an issue which caused rendering errors in the node list if the cluster
  
  contains multiple nodes with the same name
  
  note: changes the url to the detail view of single nodes
  
  
  
  
• 
  - Added UTM tokens to links that link to the Crate.IO blog
  
  
• 
  - Updated news feed URL
  
  
• 
  - Label the master node in the cluster node list
  
  
• 
  - Fixed a bug which prevented complete deletion of tables in custom
  
  schemas.
  
  
• 
  - Improved the `KILL` behaviour for `COPY`, `UPDATE` and `DELETE` statements.
  
  
• 
  - Fixed a `ClassCastException` that occurred if the left side of a `IN`
  
  predicate was a function.
  
  
• 
  - Added links to Cluster check documentation.
  
  
• 
  - Removed the `creationTime` property from `SQL(Bulk)Request` and changed the
  
  `duration` property on `SQL(Bulk)Response` to return the server-side
  
  duration instead of the full round-trip duration.
  
  
• 
  - The default number of shards is calculated dynamically upon the table
  
  creation.
  
  
• 
  - Deprecated camelCase names on `CREATE ANALYZER`.
  
  
• 
  - `+HeapDumpOnOutOfMemoryError` is no longer set by default.
  
  It can still be set using the JAVA_OPTS environment variable.
  
  
• 
  - Made sure orphaned contexts are cleaned up eventually after a coordinator
  
  node dies.
  
  
• 
  - Load ``crate.yml`` explicitly and do not allow any other extension than
  
  ``yml`` for the configuration file.
  
  
• 
  - Restrict creation of tables having the primary key constraint within
  
  an array column type or its children.
  
  
• 
  - Renamed all scalar function names to lowercase (CamelCase names
  
  were transformed to lowercase using `_` as word boundary)
  
  
• 
  - Fixed a NPE at the `substr` scalar function when using column
  
  references as from/to arguments containing null values.
  
  
• 
  - NOTE: Upgrading to this Crate version is only supported from >= 0.52
  
  
• 
  - Removed the `bulk.partition_creation_timeout` setting.
  
  
• 
  - Removed internal migration code that ensured schema backward compatibility
  
  to Crate versions <= 0.45
  
  
• 
  - Improved the speed of global aggregation queries which involve more than 1
  
  shard per node.
  
  
• 
  
  
  
• 
  - The log level of loggers can now be set at runtime via the ``SET`` statement.
  
  
• 
  - Improved validation of geo point data type; now it is not possible any more
  
  to insert invalid latitude or longitude in array literals.
  
  
• 
  - Nodes can be configured now to allow only SQL statements resulting in read operations using new setting ``node.sql.read_only``.
  
  
• 
  - Improved bulk insert/update and copy-from performance when replicas
  
  are configured.
  
  
• 
  - Fixed planner issues that could cause INSERT INTO with a JOIN in the
  
  sub-query to fail or get stuck.
  
  
• 
  - Removed the ``jobs.keep_alive_timeout`` setting and all related logic.
  
  This means it is no longer possible to enable automatic job termination.
  
  
• 
  - Added a ``node_filters`` option to ``COPY FROM``.
  
  
• 
  - Add support for ``COPY FROM`` to ``EXPLAIN``.
  
  
• 
  - The ``COPY FROM`` statement now also accepts an array of strings as URI.
  
  
• 
  - Added support for schemes supported by the used JVM's `URL` implementation
  
  for ``COPY FROM``. These usually include``http``, ``https``, ``ftp`` and
  
  ``jar``.
  
  
• 
  - Added support for the ``unnest`` table function.
  
  
  
  
• 
  - Implemented cluster check for installed java version.
  
  
• 
  - removed wrong behaving CrateClient feature which allowed to load
  
  client settings from a configuration file.
  
  
• 
  - Crate will now recognize settings defined by crate plugins.
  
  
• 
  - Implemented the EXPLAIN command for SELECT statements.
  
  
• 
  - Removed the limitation that the WHERE clause couldn't contain
  
  certain expressions in `DELETE` statements
  
  
• 
  - Exposed setting the default schema via HTTP header.
  
  
• 
  - Added `lower`` and `upper`` string functions.
  

下载地址：

• 
  Source code (zip)
  
  
• 
  
  Source code (tar.gz)
  

Crate 0.55.0 发布，数据存储系统下载地址