1. 熟悉Unix/Linux Shell和常见的命令行  (start : 7.9 - end: 7.12) 1.文件系统结构和基本操作 ls/chmod/chown/rm/find/ln/cat/mount/mkdir/tar/gzip … 2.学会使用一些文本操作命令 sed/awk/grep/tail/less/more … 3.学会使用一些管理命令 ps/top/lsof/netstat/kill/tcpdump/iptables/dd… 4.了解/etc目录下的各种配置文章,学会查看…

SQL TYPE 1:for bind value sql , first create a good plan with literal and with good  profile. then use sqlT to replace the profile‘’s good plan  to bind value sql_id. then double checking . var 1 varchar2(32);var 2 VARCHAR2(32);var 3 VARCHAR2(32);var…

基本思路是由点到面,由浅到深. 1.首先从launch文件入手. 文件中会看到比如: <node ns="> <rosparam command="load" file="$(find ipa_room_exploration)/ros/launch/room_exploration_action_server_params.yaml"/> </node> node里可以看出来节点写在哪个文件中. rosparam中写里…

Hive架构 Figure 1 also shows how a typical query flows through the system. 图一显示一个普通的查询是如何流经Hive系统的. The UI calls the execute interface to the Driver (step 1 in Figure 1). 图中的第1步,UI向Driver调用执行接口 The Driver creates a session handle for the query and send…

基于oracle的应用系统很多性能问题,是由应用系统sql性能低劣引起的,所以,sql的性能优化很重要,分析与优化sql的性能我们一般通过查看该sql的执行计划,本文就如何看懂执行计划,以及如何通过分析执行计划对sql进行优化做相应说明. 一.什么是执行计划(explain plan) 执行计划:一条查询语句在oracle中的执行过程或访问路径的描述. 二.如何查看执行计划 1.set autotrace on 2.explain plan for sql语句; select plan_tabl…

一条龙作完,如何设置EXCHANGE的操作员邮件通知.. ~~~~ http://808techblog.com/2009/07/setup-sql-server-2008-maintena.html For most of the SQL installs that I maintain, nightly SQL dumps to disk and then copy to tape is my preferred backup method. I use a simple maintenan…

Building a Database Test Plan In this section, you will learn how to create a basic Test Planto test a database server. You will create ten users that send five SQL requests to the database server. Also, you will tell the users to run their tests thr…

You will need to identify how you want your maintenance plan to be setup. In this example the maintenance plan will be setup with full backups, differentials, and transactions logs. Check SQL Server Agent Service Verify the SQL Server Agent service i…

I joined Analytics Vidhya as an intern last summer. I had no clue what was in store for me. I had been following the blog for some time and liked the community, but did not know what to expect as an intern. The initial few days were good – all the in…

Automated Testing Detail Test PlanAutomated Testing DTP Overview This Automated Testing Detail Test Plan (ADTP) will identify the specific tests that are to be performed to ensure the quality of the delivered product. System/Integration Test ensures…