RE: ORA-0214, controlfile updates question
ORA-0214, controlfile updates question -- Kevin Closson 2006-08-30
admins create multiplexed CF because one is good, so more
I agree. After a crash there is no recovery before controlfiles are
opened (and ORA-214 is signalled). Oracle can not write atomically to multiple
Some important controlfile updates (such as add datafile)
are logged to redo. But it doesn't help here. The redo can not be applied
before controlfiles are opened (redo log names are there). I believe redo is
applied to controlfiles only during media recovery when using backup
Kevin Closson wrote:
>>>Due bugs that show them in extreme circumstances - why not?
(I have to admit though that I haven't seen any corruption
cases yet where the cause would have been determined as lost
writes and nothing else).
I'm not saying it it impossible, I'm saying that in this
case it is MUCH more likely that Oracle's "transaction"
areound this type of multiplexing is a bit questionable.