There is no separate license for Data Guard - it's included with EE, and not available for SE (at least in 10g+, not sure about 9i). So you just have to pay for the database licenses on the primary and standby regardless of whether you use DG or your own log shipping scripts. The savings of using custom scripts instead of DG is only realized if it allows you to license SE instead of EE. Note that there is an extra cost for Active Data Guard in 11g. Regards, Brandon ________________________________ Privileged/Confidential Information may be contained in this message or attachments hereto. Please advise immediately if you or your employer do not consent to Internet email for messages of this kind. Opinions, conclusions and other information in this message that do not relate to the official business of this company shall be understood as neither given nor endorsed by it.