Apache Tajo v0.9 发布
时间:2014-10-22 09:43 来源:linux.it.net.cn 作者:it
Apache Tajo v0.9 发布,此版本目标是优化传统 SQL 性能,改进 Tajo leading-edge 原生 SQL 支持;提高查询速度。
Apache Tajo v0.9 改进如下:
- More comprehensive and powerful SQL capabilities, such as TIMESTAMP, DATE, TIME, and INTERVAL
type support, as well as WINDOW functions, OVER clause support, and multiple distinct aggregation;
- Performance improvements, such as offheap sort algorithm for ORDER BY and Runtime code
generation for evaluating expressions push the boundaries of massive data query speeds;
- Improvements to the hash shuffle I/O, boosting bottom-line speeds by 200-300% on "heavy",
complex queries;
- Enhanced Hadoop integration, including support for Hadoop 2.2.0 up to Hadoop 2.5.1, and
expanded Hive Metastore access;
- Improved catalog backup and restore feature, as well as accessibility enhancements streamline
performance across disparate technology environments.

Tajo 是一个分布式数据仓库系统,基于 Hadoop 实现,特点是低延迟、高可伸缩,提供专用查询和 ETL 工具
特点:
-
可伸缩性和低延迟
-
完全分布式的 SQL 查询处理,基于存储雨 HDFS 的大数据集
-
超低响应时间(约100毫秒),在合理数据范围内的简单查询
-
支持长时间运行的查询
-
容错支持,避免某些任务失败后的查询重启
-
动态调度,处理和异构集群节点故障
-
ETL
-
ETL 可实现不同数据格式之间的转换
-
支持多种文件格式,如 CSV、RCFile 和 RowFile
-
扩展性
-
支持用户自定义函数
-
提供自定义文件格式的 Scanner/Appender 接口
-
兼容性
-
遵循 ANSI/ISO SQL 标准,非标准方面遵循 PostgreSQL 规范
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支持 HiveQL 模式
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在 HCatalog 和 Hive MetaStore 实现表访问
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支持 JDBC 驱动
-
简单
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提供交互式 Shell 来提交 SQL 查询到 Tajo 集群
-
提供备份和恢复工具
-
异步/同步 Java API 来提交 SQL 查询到 Tajo 集群
(责任编辑:IT)
Apache Tajo v0.9 发布,此版本目标是优化传统 SQL 性能,改进 Tajo leading-edge 原生 SQL 支持;提高查询速度。 Apache Tajo v0.9 改进如下: - More comprehensive and powerful SQL capabilities, such as TIMESTAMP, DATE, TIME, and INTERVAL type support, as well as WINDOW functions, OVER clause support, and multiple distinct aggregation; - Performance improvements, such as offheap sort algorithm for ORDER BY and Runtime code generation for evaluating expressions push the boundaries of massive data query speeds; - Improvements to the hash shuffle I/O, boosting bottom-line speeds by 200-300% on "heavy", complex queries; - Enhanced Hadoop integration, including support for Hadoop 2.2.0 up to Hadoop 2.5.1, and expanded Hive Metastore access; - Improved catalog backup and restore feature, as well as accessibility enhancements streamline performance across disparate technology environments.
Tajo 是一个分布式数据仓库系统,基于 Hadoop 实现,特点是低延迟、高可伸缩,提供专用查询和 ETL 工具 特点:
|