Database Backup and Recovery (MOSC)

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SCN,LOG and INCOMPLETE RECOVERY

edited Jun 28, 2012 4:17AM in Database Backup and Recovery (MOSC) 5 commentsAnswered
Q1.

When alert log says

Beginning log switch checkpoint up to RBA [0x558d2.2.10], SCN: 10752176190564
Mon Jun 25 03:24:43 2012
Thread 1 advanced to log sequence 350418 (LGWR switch)
  Current log# 2 seq# 350418 mem# 0: /appl/oradata/bip2t1/redo/member1/redo02.log
Mon Jun 25 03:29:47 2012
Completed checkpoint up to RBA [0x558d2.2.10], SCN: 10752176190564

What SCN represents here ? Is it the SCN of first committed transaction or the last ?

Q2.In Case of incomplete recovery when we say recover till log sequence X , X might contain redo records of the transactions which has not committed in log sequence X rather committed in say X+1 log sequence , will oracle keep these uncommited data of the transaction in the database ? or it rolls back for any uncommitted transaction alike roll back in transaction recovery in instance failure ?

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