Database Administrator

I am from Fedora. If it is another one, it is slightly different on the command line. 1. Install the database driver Adapter Http://sourceforge.net/projects/mysql-python/ 2. Unzip the package and install the package. problems may occur during

After modifying the storage path of the mysql database, you can't start it until you have forgotten it. Later, you can view it in ls-Z. It turns out to be selinux. You can use chcon-t mysqld_db_t/home/mysqlData. The method for changing the database

I. AWR usageSQL> @? /Rdbms/admin/awrrpt. SQL Specify the Report Type~~~~~~~~~~~~~~~~~~~~~~~Wocould you like an HTML report, or a plain text report?Enter 'html' for an html report, or 'text' for plain textUlts to 'html'Enter the value of

In Linux, Oracle installs the configuration of One listener for two instances: Listener. ora file, # LISTENER. ORA Network Configuration File:/opt/oracle/product/9.2/network/admin/listener. ora# Generated by Oracle configuration tools. LISTENER

Common Operations in the undo tablespace: (1) view the properties of the undo tablespace undotbs1:SQL> select B. tablespace_name, AUTOEXTENSIBLE, RETENTION from dba_tablespaces a, dba_data_files BWhere a. TABLESPACE_NAME = B. TABLESPACE_NAME and B.

Recently, the project has been completed (maybe not enough), but a fatal obstacle is performance. Now let's think about how brilliant the TOP author is. The performance runs through various stages such as project requirements, project analysis and

1. Backup File Define fil =/home/Oracle/cdbk. SQLDefine log =/home/oracle/cdbk. logSpool & filPrompt connet sys/sysdba @ asmdemo as sysdba;Prompt shutdown immediate;Select 'host cp' | file_name | '/u01/asmdemo' | substr (file_name, instr (file_name,

1. rm-f system01.dbf 2. Database disconnection Error SQL> shutdown immediateThe ORA-01116: error in opening database file 1ORA-01110: data file 1: '/u01/app/Oracle/oradata/demo/system01.dbf'ORA-27041: unable to open fileLinux Error: 2: No such

I. Multi-version concurrent access control Oracle can automatically implement read consistency (read consistency) of a query, that is, the data obtained by a query comes from the same time point (single point in time) (This is also called

During the process of installing Oracle10g clusterware, installation may often fail due to errors. In this case, you need to clear all installed information to ensure that the reinstallation is successful. This work varies slightly on different

First, we use the Linux RedHat 4.6 system. The runtime of mysqlis mysql-5.0.18.tar.gz. The kernel version is as follows: The theoretical content in this article is not explained in detail. It only describes how to install and deploy one machine and

1. MongodbVersion: mongodb-linux-x86_64-static-legacy-1.8.1.tgz: Http://www.mongodb.org/downloadsMongodb provides two download editions: mongodb-linux-x86_64-1.8.1.tgz and mongodb-linux-x86_64-static-legacy-1.8.1.tgzDifference: the "legacy static"

After installing mysql5.1.34 in the upgrade system, I have been too reluctant to install it. I directly downloaded a software package. Today, I took the time to compile and install this version. According to the official statement, several Versions

Recently installed a jboss-as-web-7.0.2.Final, now will configure the mysql Data Source process records as follows: 1. Add the Mysql driver File Copy the mysql driver file mysql-connector-java-5.1.18-bin.jar to the/modules/com/mysql/main/directory (/

Go to http://dev.mysql.com/downloads/mysql/5.5.html#downloads: Download the following three files respectively (because my machine is 32-bit, the following is a 32-bit package. If your machine is 64-bit, please download the 64-bit version

Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 Hardware 8c65g About 74 I/O operations for database queries without lob The database has lob but does not query lob I/O operations about 146. The database has lob and query lob io operations

The SQLite library contains a command line named sqlite3, which allows you to manually enter and execute SQL commands for the SQLite database. This document provides a brief description of sqlite3.Start To start the sqlite3 program, you only need to

Read/write separation while backing up Topology: Database Synchronization replication software is an important part of disaster recovery for key systems. When the production system encounters exceptions or faults, the database of the backup

Mysqldump Xtrabackup is a data backup tool for InnoDB. It supports online Hot Backup (which does not affect Data Reading and Writing during Backup) and is a good alternative to InnoDB Hotbackup. Xtrabackup contains two tools: * Xtrabackup-A Tool for

We add User. hbm. xml to some extensions to illustrate the meanings of common attributes: Xml Version='1. 0' Encoding='Utf-8'?> PUBLIC "-// Hibernate/Hibernate Mapping DTD 3.0 // EN" Http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">