You administer a RAC database that currently runs on a four-node cluster but which has three instances. Which two statements are always true about redo logs for this RAC database? (Choose two.)
A.
A thread of redo must be created before starting a fourth instance if a thread is not already available.
B.
A thread of redo is automatically dropped when an instance is removed from a RAC database by using SRVCTL.
C.
All the instances must have the same number of redo log groups and each group must have the same number of redo log members.
D.
A redo log group added using ALTER DATABASE ADD LOGFILE without the INSTANCE clause is added to each instance.
E.
A thread of redo must contain at least two log groups before it can be enabled.
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Test_1
7 months ago