How reman backup the blocks being written from memory to disk

Hi All,
I am thinking about one case when backuping the datafiles with RMAN.
That is the rman is about to backup block A when this block is being written by DBWR from memory to disk.
Let's assume the writing is just partially done. What will RMAN do in this case?
1. Wait until the writing is done and back it up
2. Backup what RMAN sees at that time
I am just wondering whether the choice 2 will leave the block inconsistent and so be taken as corrupt when restored.
Best regards,
Leon

user12064076 wrote:
Hi All,
I am thinking about one case when backuping the datafiles with RMAN.
That is the rman is about to backup block A when this block is being written by DBWR from memory to disk.
Let's assume the writing is just partially done. What will RMAN do in this case?
1. Wait until the writing is done and back it up
2. Backup what RMAN sees at that time
I am just wondering whether the choice 2 will leave the block inconsistent and so be taken as corrupt when restored.
Best regards,
LeonHi Leon
That's why if you don't take backup of archived redo log file that was generated after the full backup, the backup is considered "inconsistent". If you use "backup database plus archivelog" command, this means that after backing up the database, RMAN switches redo log files and archives it to make the whole backup "consistent"
Kamran Agayev A.
Oracle ACE
http://kamranagayev.com

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