Apache Lens 2.1.0 Beta Incubating 发布
5月23日 西安 OSC 源创会开始报名啦，存储、虚拟机、Docker 等干货分享
Apache Lens 2.1.0 Beta Incubating 发布，这是 Apache Lens 项目的第二次发布，更新信息如下：
bug 修复
-
Lens Server is not getting shutdown in case if user tries to stop before initialising the server
-
Explain and prepare not giving correct value for "NumFilters" and "NumHaving"
-
" not a cube column " error should give correct column name
-
Registration of predict udf in remote hive server not working
-
SQLException in database/ldap-backed-database user config loader
-
Query should fail with invalid time range when from and to are equal
-
Error Message for missing partition should list all the partitions missing
-
Session not found error code should be 410
-
NPE when query fails with execute_timeout api
-
Explain throwing NPE if table is not present in the cube
-
NPE when session is gone but the query launched by the session is still getting submitted
-
Getting syntax error when trying to drop partition from lens-cli when partition doesnt exist
-
Issue while getting persistent result of finished JDBC query
-
Exception while purging query : integrity constraint violation, unique constraint or index violation
-
TestCubeRewriter.testQueryWithNow is failing intermittently
性能改善
-
Checkstyle/Findbugs violations in code
-
Add number of possible distinct values for dim-attributes
-
Add flag to TableReference for user to specify if its a join key reference
-
Lens-Example should have some facts table in db to run cube query in JDBC
-
Create symlinks to versioned jars in packaging
-
Create an example schema and queries from a real world use case
-
Printing current path while installing the lens-server debian
-
Add estimate api in driver and REST api in server
-
Reduce number of metastore lookups during cube query rewriting
-
Add latency metering for each resolver in cube query rewriter
-
Add latency metering metrics for all api exposed through REST
-
Accept db to be set as part of open session call
-
Add resources to hive driver lazily
新特性：
-
Add examples execution to ML
-
Provide a way to add static jars at db level
-
Add api for adding partitions in batch
详细信息请查看 发行页面 。
此版本现已提供下载：
http://lens.incubator.apache.org/releases/download.html
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：
正文到此结束
热门推荐
相关文章
近期评论
-
文章和留言都翻到11页了 没有OOM
-
-
朋友，翻页到11页，及以后，会出现OOM，无法访问
-
-
搞个gitee的项目
-
-
版本号是多少，你可以下载哪个代码仓库，jdk选1.8 直接跑就行
-
-
-
Loading...
![[HBLOG]公众号](https://www.liuhaihua.cn/img/qrcode_gzh.jpg)
