Home Database Mysql Tutorial EXP/IMP迁移数据

EXP/IMP迁移数据

Jun 07, 2016 pm 05:28 PM
oracle database

EXP/IMP对于小数据量的数据库,是一个不错的迁移工具。 迁移数据过程如下,分两大步,导出和导入。

项目背景:

原来的数据库服务器运行在HP DL388G7服务器上面,内存32G,,由于业务增长,内存吃紧,加上时不时出现服务器硬件故障,由于是单实例单服务器,存在单点发现,于是打算采取一些措施改善一下:

1)升级服务器内存

2)并搭建服务器操作系统级别的双机

3)迁移数据库数据到新服务器

前面已经写过升级服务器内存相关的文章,题目为“数据库服务器升级内存需要考虑的问题”,链接如下:

——————————————————————————————————————————————————————————

 

EXP/IMP对于小数据量的数据库,是一个不错的迁移工具。 迁移数据过程如下,分两大步,导出和导入。

 

一、导出过程 1、准备好导出脚本:

more / exp20130118/exp.sh

date

expdp bv/bv32EBAI2 DIRECTORY=DATA_PUMP_DIR2 DUMPFILE=exp_2013-1-19.dmp LOGFILE=exp_2013-1-19.log SCHEMAS=bv

date

 

2、创建导出目录:

exp目标目录放在本地还是存储,放哪个目录?是否创建directory

SQL> select * from dba_directories;

OWNER DIRECTORY_NAME DIRECTORY_PATH

SYS DATA_PUMP_DIR /Oracle/product/10.2/db/rdbms/log/

SYS DATA_PUMP_DIR1 /exp

SYS ORACLE_OCM_CONFIG_DIR /oracle/product/10.2/db/ccr/state

 

create directory data_pump_dir2 as ' /exp20130118';

3、导出dmp文件

找一个业务不繁忙的时间,执行导出脚本即可。

 

二、导入过程 1、创建表空间、用户

说明:

1google网上大多数文章都说,如果用exp/imp方式迁移数据,在新服务器上,只需要创建一个用户用于导入就可以,但是我第一次导入时只创建一个用户,就会报一大堆错,最后还是创建所有用户,知道的同学告诉我一声,谢谢。

2)我这里偷点懒,直接用toad拷贝创建用户的语句,连加密的密码也有了,方便。

 

Toad里边拷贝创建表空间和用户的脚本,直接粘贴进行初始化准备工作。表空间主要是看看和用户相关的都有哪些表空间,可以用sql语句查询;用户就得一个一个看。

 

11创建一个参数文件

CREATE PROFILE LIMIT_SESSION LIMIT

SESSIONS_PER_USER 30

CPU_PER_SESSION DEFAULT

CPU_PER_CALL DEFAULT

CONNECT_TIME DEFAULT

IDLE_TIME DEFAULT

LOGICAL_READS_PER_SESSION DEFAULT

LOGICAL_READS_PER_CALL DEFAULT

COMPOSITE_LIMIT DEFAULT

PRIVATE_SGA DEFAULT

FAILED_LOGIN_ATTEMPTS DEFAULT

PASSWORD_LIFE_TIME DEFAULT

PASSWORD_REUSE_TIME DEFAULT

PASSWORD_REUSE_MAX DEFAULT

PASSWORD_LOCK_TIME DEFAULT

PASSWORD_GRACE_TIME DEFAULT

PASSWORD_VERIFY_FUNCTION DEFAULT;

linux

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

MySQL: An Introduction to the World's Most Popular Database MySQL: An Introduction to the World's Most Popular Database Apr 12, 2025 am 12:18 AM

MySQL is an open source relational database management system, mainly used to store and retrieve data quickly and reliably. Its working principle includes client requests, query resolution, execution of queries and return results. Examples of usage include creating tables, inserting and querying data, and advanced features such as JOIN operations. Common errors involve SQL syntax, data types, and permissions, and optimization suggestions include the use of indexes, optimized queries, and partitioning of tables.

What to do if the oracle can't be opened What to do if the oracle can't be opened Apr 11, 2025 pm 10:06 PM

Solutions to Oracle cannot be opened include: 1. Start the database service; 2. Start the listener; 3. Check port conflicts; 4. Set environment variables correctly; 5. Make sure the firewall or antivirus software does not block the connection; 6. Check whether the server is closed; 7. Use RMAN to recover corrupt files; 8. Check whether the TNS service name is correct; 9. Check network connection; 10. Reinstall Oracle software.

How to solve the problem of closing oracle cursor How to solve the problem of closing oracle cursor Apr 11, 2025 pm 10:18 PM

The method to solve the Oracle cursor closure problem includes: explicitly closing the cursor using the CLOSE statement. Declare the cursor in the FOR UPDATE clause so that it automatically closes after the scope is ended. Declare the cursor in the USING clause so that it automatically closes when the associated PL/SQL variable is closed. Use exception handling to ensure that the cursor is closed in any exception situation. Use the connection pool to automatically close the cursor. Disable automatic submission and delay cursor closing.

Why Use MySQL? Benefits and Advantages Why Use MySQL? Benefits and Advantages Apr 12, 2025 am 12:17 AM

MySQL is chosen for its performance, reliability, ease of use, and community support. 1.MySQL provides efficient data storage and retrieval functions, supporting multiple data types and advanced query operations. 2. Adopt client-server architecture and multiple storage engines to support transaction and query optimization. 3. Easy to use, supports a variety of operating systems and programming languages. 4. Have strong community support and provide rich resources and solutions.

How to create cursors in oracle loop How to create cursors in oracle loop Apr 12, 2025 am 06:18 AM

In Oracle, the FOR LOOP loop can create cursors dynamically. The steps are: 1. Define the cursor type; 2. Create the loop; 3. Create the cursor dynamically; 4. Execute the cursor; 5. Close the cursor. Example: A cursor can be created cycle-by-circuit to display the names and salaries of the top 10 employees.

How to stop oracle database How to stop oracle database Apr 12, 2025 am 06:12 AM

To stop an Oracle database, perform the following steps: 1. Connect to the database; 2. Shutdown immediately; 3. Shutdown abort completely.

What to do if the oracle log is full What to do if the oracle log is full Apr 12, 2025 am 06:09 AM

When Oracle log files are full, the following solutions can be adopted: 1) Clean old log files; 2) Increase the log file size; 3) Increase the log file group; 4) Set up automatic log management; 5) Reinitialize the database. Before implementing any solution, it is recommended to back up the database to prevent data loss.

Oracle's Role in the Business World Oracle's Role in the Business World Apr 23, 2025 am 12:01 AM

Oracle is not only a database company, but also a leader in cloud computing and ERP systems. 1. Oracle provides comprehensive solutions from database to cloud services and ERP systems. 2. OracleCloud challenges AWS and Azure, providing IaaS, PaaS and SaaS services. 3. Oracle's ERP systems such as E-BusinessSuite and FusionApplications help enterprises optimize operations.

See all articles