Scheduling automatic backups - Amazon ElastiCache for Redis

Scheduling automatic backups

You can enable automatic backups for any ElastiCache for Redis cache. When automatic backups are enabled, ElastiCache creates a backup of the cache on a daily basis. There is no impact on the cache and the change is immediate. Automatic backups can help guard against data loss. In the event of a failure, you can create a new cache, restoring your data from the most recent backup. The result is a warm-started cache, preloaded with your data and ready for use. For more information, see Restoring from a backup into a new cache.

When you schedule automatic backups, you should plan the following settings:

  • Backup start time – A time of day when ElastiCache begins creating a backup. You can set the backup window for any time when it's most convenient. If you don't specify a backup window, ElastiCache assigns one automatically.

     

  • Backup retention limit – The number of days the backup is retained in Amazon S3. For example, if you set the retention limit to 5, then a backup taken today is retained for 5 days. When the retention limit expires, the backup is automatically deleted.

    The maximum backup retention limit is 35 days. If the backup retention limit is set to 0, automatic backups are disabled for the cache.

You can enable or disable automatic backups when either creating a new cache or updating an existing Redis cache, by using the ElastiCache console, the AWS CLI, or the ElastiCache API by checking the Enable Automatic Backups box in the Advanced Redis Settings section.