概述
官网: The ENABLE_EXPR_REWRITES query option controls whether to enable or disable the query compile time optimizations. These optimizations rewrite the expression trees to a more compact and optimized form that helps avoid redundant expres…
一、环境准备
1、服务器配置和角色规划
IP 地址主机名硬件配置操作系统安装步骤10.168.168.1cm-server8C16GCentos7新建10.168.168.2agent018C16GCentos7新建10.168.168.3agent028C16GCentos7新建10.168.168.4agent038C16GCentos7新建10.168.168.5agent048C16GCentos7扩容
2…
转 http://blog.cloudera.com/blog/2012/07/hbase-log-splitting/ cloudera的blog还是挺不错的 In the recent blog post about the Apache HBase Write Path, we talked about the write-ahead-log (WAL), which plays an important role in preventing data loss should a HB…
SPSS数据分析全套教程(1)——SPSS概览
什么是SPSS?
社会科学统计软件包(Statistical Package for the Social Science,SPSS)是世界著名的统计分析软件之一。 经近40年的发展,在全球已拥有大量…