Apache Lens 2.4.0
欢迎加入运维网交流群:263444886Apache Lens 2.4.0-beta 发布，此版本更新内容如下：
子任务
[*] - Document how to document a feature in contributor guide
[*] - TestRewriting test is failing with powermock incompatibility with jdk8
[*] - Test Failures on java8
[*] - Bump version in master to 2.4
[*] - exclude patchprocess directory from licence check.
[*] - Change version number to 2.4.0-beta-SNAPSHOT in master
[*] - UI Module failing if maven version is < 3.1
[*] - Merge master with current-release-line for 2.4
[*] - Bump version in master to 2.5
[*] - Verify Lens 2.4 issues
[*]
- Update 2.4>
[*] - Update gpg keys in dist repo
Bug 修复
[*] - FinishedLensQuery is not storing selectedDriver
[*] - server params should not be passed to session and drivers
[*] - Cannot retrieve query results on lens server restart
[*] - Query output files should have the query name
[*] - Drop partition is assigning latest=null if latest partition is being dropped
[*] - Example query on customer_city_name failing
[*] - Partition Created for querystats is not honouring "lens.server.statistics.warehouse.dir"
[*] - null Error Message on Lens Server logs
[*] - Unable to override "lens.server.session.expiry.service.interval.secs" because of spelling mistake
[*] - NPE on closing HadoopFileFormatter
[*] - Query remains in queue even when driver is free
[*] - StatusPoller logs are useless
[*] - Look ahead is failing with partition not found if any process time partitions are absent
[*] - ThreadSafeEstimatedQueryCollection is ignoring driver argument in getQueries and getQueryCount
[*] - lens.client.query.poll.interval needs doc update
[*] - Columnar JDBC Rewriter in incorrectly pushing filter against wrong alias when fact columns map to a single dimension
[*] - lens-ship-jars in current-release-line branch should have parent version 2.4.0-beta-SNAPSHOT instead of 2.5.0-beta-SNAPSHOT
改进
[*] - Lens is not building against on JAVA-8
[*] - Look ahead timerange should not look for all finer granularity partitions to be present
[*] - Critical metrics for lens
[*] - Add inline values to be specified for XDimAttribute in xsd
[*] - A new, improved web client.
[*] - Queries get purged to DB as soon as they finish
[*] - Allow column name mapping for few/all columns in underlying storage tables
[*] - Support for !=, in and not in predicates in elastic search driver
[*] - Enhance cube.xsd to accept Hierarchical dimattribute and inline dimattribute
[*] - Throw single error out with LensMultiException
[*] - Generate udf jar for lens-regression
[*] - Queue number for queries
[*] - rename LogicalTableCrudCommand to ConceptualTableCrudCommand and PhysicalTableCrudCommand to LogicalTableCrudCommand
[*] - Examples should continue to run in case submission failures
[*]
- Both time and>
[*] - UI support for the saved, parametrized query feature.
[*] - Slow response times for /metastore/nativetables API
[*] - Improve CLI documentation to mention the helpful role of pressing tab while writing commands
[*] - Create a single jar for shipping with hive queries
新特性
[*] - Saved query and parameterization
[*]
- Support flattening of columns selected through bridge-tables(many-to-many>
任务
[*] - Improve developer documentation
[*] - Move cube specific error message codes from InMobi's Hive code to Lens
[*] - Remove feather logo from the repository, use already existing image to display on website
[*] - setup build job with java8 on jenkins
[*]
->
更多内容请看发行说明。
Lens 提供了一个统一数据分析接口。通过提供一个跨多个数据存储的单一视图来实现数据分析任务切分，同时优化了执行的环境。无缝的集成 Hadoop 实现类似传统数据仓库的功能。
该项目主要特性：
[*] 简单元数据层为数据存储提供抽象视图层
[*] 单一的共享模式服务器，基于 Hive 元存储。模式通过数据管道 HCatalog 和分析应用进行共享：
[*] OLAP Cube QL 类似 SQL 的高级语言用来查询和描述存放在不同数据立方体 (Cubes) 中的数据集
[*] JDBC 驱动和 Java 客户端库来处理查询
[*] Lens 应用服务器 - 这是一个 REST 服务器允许用户查询数据，更改数据模型，调度查询和查询的配额限制
[*] 基于驱动的架构 允许在报表系统中进行嵌入，例如 Hive、列数据存储、Redshift 等
[*] 基于成本算法的引擎选择 - 该算法可优化资源的使用，通过对查询的复杂度自动选择最佳执行引擎
Apache Lens 的架构如下：
页:
[1]