Thanks. I wonder how it can restore to previous Friday if a base backup gets taken Sunday night. I thought it would restore base backup first and then apply incremental on the top of that base backup. I thought the backups taken before base backup were useless and cannot be used to restore to a point in time in last week, even if recovery window of 7 days is specified. ie, in this example, wanting to go back to last Friday on a given Monday, with a base backup on Sunday. On Thu, Mar 18, 2010 at 8:55 AM, Guillermo Alan Bort <cicciuxdba@xxxxxxxxx>wrote: > Orlando, > > Also keep in mind that RMAN automatically manages retentions for you, so > if you tell it that you need to have a retention policy of 'RECOVERY WINDOW > 7 DAYS', it will automatically keep all the backup files required to > guarantee that policy. You will also have to use RMAN commands to ensure > backup consistency when deleteing files (namely: delete obsolete). > > Also, read the RMAN documentation, there are a lot of answers there: > > http://www.oracle.com/technology/deploy/availability/htdocs/rman_overview.htm > http://www.oracle.com/pls/db102/portal.portal_db?selected=4 > Alan.- > > > > On Thu, Mar 18, 2010 at 10:43 AM, andrey khudyakov < > andrey.hudyakov@xxxxxxxxx> wrote: > >> William, you are mistaken. >> differential and comulative are exclusive to each other, but each of >> them is incremental backup. >> >> Orlando, if you want recover your database till some <recover_point>, you >> should have available all incremental backups until recover_point and all >> archived logs between start_time of last incremental backup and >> recover_point >> >> 2010/3/18 William Muriithi <william.muriithi@xxxxxxxxxxxxxxxxxxx> >> >> First, you said differential incremental backup. I believe differential >>> and incremental are exclusive to each other if I am not wrong. >>> >>> Now assuming incremental, you use the monday full backup and all >>> incrementals up to Thursday. >>> >>> If its differential, you use the full backup and the last differential >>> backup, which is Thursday >>> >>> ------------------------------ >>> * >>> * >>> >>> >>> >>> >> >> >