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Oracle Dat Guard -- How to calculate RPO --
Team,
I’m looking for guidance on how to calculate the RPO for Oracle Data Guard when Redo transport mechanism is different than LGWR SYNC (RPO=0)
Thank you very much for your answer,
Agostino
Agostino Brunamontini
Advisory Systems Engineer
EMSD Specialist
EMC Computer Systems Italia S.p.A
ichakrab
27 Posts
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May 2nd, 2014 02:00
You may use
ARCHIVE_LAG_TARGET parameter here. You can find the details here.zhaos2
643 Posts
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April 29th, 2014 22:00
EMC has a BCSD tool for RPO calculation based on write I/Os on the LUNs in the consistency Group, I am not sure if Oracle has a similar tool for Data Guard RPO calculation.
The most common way customers deploy Oracle DataGuard is with a physical database and using Redo Apply. Essentially only the Redo Log entries are written across the interconnect and the Redo Log entries then used to apply the update on the remote copy. The RPO for DG will depend on the actual redo logs transferred, interconnect bandwidth, DG protection/performacne modes etc. For a production DB, you can check the 'archive log sequence' of Primary and Standby databases.