How to back up oracle

Oracle, as a commonly used database software, is one of the commonly used data storage solutions for many enterprises. For enterprises, database data backup is very important. This can not only solve the risk of data problems, but also make enterprises more comfortable in data management. So how to back up data in Oracle database management?

Backup can be divided into two categories: full backup and incremental backup. Full backup refers to backing up the entire database (including data files, log files and control files); incremental backup refers to backing up a part of the database, including backup of incremental log files and control files. When backing up, you also need to consider factors such as whether to compress the backup and where the backup will be stored.

The following are the steps to back up the Oracle database:

Step 1: Log in to the Oracle database and create a backup folder

First, you need to log in to the Oracle database. Before using the backup command, you need to create a backup folder so that you can store your backup files in it. You can use the following command to create the folder:

mkdir /backup

Step 2: Back up the entire database

To back up the entire database, you can use the following command:

exp full=y file=/backup/oracle_backup.dmp

Using the above command, add Export the entire database and store it in the oracle_backup.dmp file in the /backup directory.

Step 3: Incremental Backup

To do an incremental backup, you need to use the following command:

exp userid=<username>/<password> consistent=y buffer=32768 \
file=/backup/oracle_backup_<date>.dmp log=/backup/oracle_backup_<date>.log \
compress=y consistent=y consistent=n consistent=y indexes=y \
rows=y constraints=y triggers=y grants=y

Using the above command, only a portion of the library will be exported. In the command, you can specify the data type to be backed up, such as tables, indexes, etc. Additionally, you can ensure consistent backups by adding the "consistent" option.

Step 4: Copy the backup file to a safe location

In order to ensure the security of the data, copying the backup file is also very important. You can use the following command to copy the backup file to a local location:

scp /backup/oracle_backup.dmp user@remotehost:/backup/

Using the above command, it will copy the backup file oracle_backup.dmp from the local /backup directory to the /backup directory of the remote host.

Summary

Through the above steps, you can back up the data of the Oracle database. Of course, backup files should also take into account factors such as storage time and location. In the event of unexpected inability to access data, backup is your last line of defense to restore data. You can imagine the importance of backup.

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