摘要: Table 2. JavaHBase Version JDK 6 JDK 7 JDK 81.0Not SupportedyesRunning with JDK 8 will work but is not well tested.0.98yesyesRunning with JDK 8 w... 阅读全文
posted @ 2015-02-10 23:32 JackyKen 阅读(150) 评论(0) 推荐(0) 编辑
摘要: 1、Distributed Cluster Demo ArchitectureIn reality, you need a fully-distributed configuration to fully test HBase and to use it in real-world scenario... 阅读全文
posted @ 2015-02-10 18:49 JackyKen 阅读(837) 评论(2) 推荐(0) 编辑
摘要: create tablespace testdatalogging datafile 'D:\oracle\oradata\orcl\testdata.dbf' size 50m autoextend on next 100m maxsize 20480m extent management... 阅读全文
posted @ 2015-02-04 20:52 JackyKen 阅读(197) 评论(0) 推荐(0) 编辑
摘要: 1、用plsql连不上oracle 11g(64位),先去下载一个oracle 11g(32位客户端)http://www.oracle.com/technetwork/database/features/instant-client/index-097480.html(可用迅雷下载)2、安装客户端... 阅读全文
posted @ 2015-02-04 18:33 JackyKen 阅读(356) 评论(0) 推荐(0) 编辑
摘要: Programming Impala ApplicationsThe core development language with Impala is SQL. You can also use Java or other languages to interact with Impala thro... 阅读全文
posted @ 2015-02-04 09:44 JackyKen 阅读(177) 评论(0) 推荐(0) 编辑
摘要: Components of the Impala ServerThe Impala server is a distributed, massively parallel processing (MPP) database engine. It consists of different daemo... 阅读全文
posted @ 2015-02-04 09:43 JackyKen 阅读(215) 评论(0) 推荐(0) 编辑
摘要: Impala Concepts and ArchitectureThe following sections provide background information to help you become productive using Cloudera Impala and its feat... 阅读全文
posted @ 2015-02-04 09:37 JackyKen 阅读(162) 评论(0) 推荐(0) 编辑
摘要: public static void main(String[] args) throws ParseException { String str = "20140301"; String str1 = "20140731"; SimpleDateForma... 阅读全文
posted @ 2015-01-26 17:47 JackyKen 阅读(336) 评论(0) 推荐(0) 编辑
摘要: 根据mapjoin的计算原理,MAPJION会把小表全部读入内存中,在map阶段直接拿另外一个表的数据和内存中表数据做匹配。这种情况下即使笛卡尔积也不会对任务运行速度造成太大的效率影响。mapjoin的应用场景如下:1.有一个极小的表= a.min_dt) f left outer join h... 阅读全文
posted @ 2015-01-26 17:25 JackyKen 阅读(1835) 评论(0) 推荐(1) 编辑
摘要: 二叉堆是一种特殊的堆,二叉堆是完全二叉树或者是近似完全二叉树。二叉堆满足堆特性:父节点的键值总是保持固定的序关系于任何一个子节点的键值,且每个节点的左子树和右子树都是一个二叉堆。当父节点的键值总是大于或等于任何一个子节点的键值时为最大堆。 当父节点的键值总是小于或等于任何一个子节点的键值时为最小堆。... 阅读全文
posted @ 2015-01-26 14:54 JackyKen 阅读(870) 评论(0) 推荐(0) 编辑