Open database user managed backup

Hi
during open database user managed backup does data is written in the datafile which is put in backup mode ?
Please suggest
Thanks
Huzaifa

huzaifa wrote:
Hi
during open database user managed backup does data is written in the datafile which is put in backup mode ?
Please suggest
Thanks
HuzaifaWhen an 'alter tablespace begin backup' command is issued the datafiles that belong to the tablespace are marked as hot-backup-in-progress. The dirty databuffers in the database buffer cache that belong to the database files are written out to the files and the datafiles are checkpointed. The datafile headers are updated to the SCN captured when the begin backup is issued. The datafile headers are not updated until the 'alter tablespace end backup' command is issued; however, the datablock within the database files can continue to be read and updated. When the datafile is restored from a hot backup, the recovery will begin from the SCN captured during the begin backup is issued. All changes applied during the hot backup time period will be
rolled forward from the redo logs.
Regards,
Teymur Hajiyev
Oracle 10g Certified Master
http://teymur-hajiyev.blogspot.com
http://dba.az

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would u pls tell me in understandable manneRefer below link
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