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Loss of Both current redo logs

From: Flora Seymour <fseymour_at_nfpower.na.ca>
Date: 20 Jul 1998 14:19:50 GMT
Message-ID: <6ovjm6$sss$1@nova.thezone.net>


Hi

I have a question on the loss of current REDO log files and recovery that I am hoping someone might like to comment on.

It is my understanding that if we were to lose both current redo log files that we would have to restore our database and recover up to just before the creation of those lost redo logs.         

For us this could mean the loss of allot of critical data. Here is why...

We have fairly large redo log files (100m) to prevent frequent switching during our nightly batch processing that does a lot of large updates. This means that during our online day, where we have *alot* of small update transactions (customer requests), our log files do not switch at all. This implies that if we were to loss both current redo logs near the end of our online day we would loss all transactions for that day (we have no paper trail - no way to re-create these transactions). I am thinking that we should schedule a job to run every 15 minutes or so during our online day that would force a switch of our redo logs. That way, if we were to be so unlucky that we lost both of our online redo logs (yes they are on different disks and controllers), we not lose allot.

What negative side effects would forcing a switch every 15 minutes imply? Is this a bad idea? Am I understand this correctly? Am I overly paranoid?                  

Thanks in Advance for any input...
Flora Received on Mon Jul 20 1998 - 09:19:50 CDT

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