Disaster Recovery Without File System and Database Replication

You can set up Disaster Recovery using backup instead of file system and database replication. With replication, any changes made on the production site are also applied to the standby site. Backup is less costly than replication but enables you to recover only backed-up data. For example, if data was last backed up on Friday and the production site is damaged on the following Thursday, data changes that occurred between the two dates are lost. More-frequent backups enable you to recover more data.

The file system backup and the database backup must be synchronized. Backing up the file system and the database at approximately the same time, when there is relatively little activity, ensures that they are synchronized.

For Disaster Recovery without file systems and database replication, take one of these steps:

• Replicate the installation image to ensure that all patches applied to the production site after the initial setup are also applied to the standby site.

• Promptly manually apply all patches at the production site to the standby site.