For databases that are hosted on the OpenERP Online Cloud and have a valid OpenERP Enterprise subscription (i.e. only paying customer), we keep backups of each database as follows:

• Daily: One backup per day, kept for 7 days
• Weekly: One backup per week, kept for 1 month
• Monthly: One backup per month, kept for 3 months

(database size does not matter)

It is possible for the owner of a database to download a backup of the current state of the database:

• Sign in on openerp.com with the account that pays for the database (this is very important otherwise you will only see the "Revoke Access" option)
• On the Home page where you see "Your Accounts", click on the arrow in the top right of the box where you see your company logo.
• Click on "Download Backup":
• Note: If you haven't been connected to your database as the Administrator recently, you way get a warning message telling you to connect as Administrator. You simply have to go to your instance with the right account then come back. The easiest way to do this is to click on the icon representing your company (you will be automatically logged into your databasase) then come back to accounts.openerp.com. The link to download your backup should then work.
• Note 2: This is not available for trial subscriptions nor for on-site hosting. For on-site deployments you can use the database manager to perform your own backups.