Re: Why I don't like RMAN repositories

From: Andrew Kerber <>
Date: Tue, 10 Dec 2013 09:18:18 -0600
Message-ID: <>

A couple of points, afaik you do not need an rman repository for dataguard. I have set up and managed a lot of standby's without a repository. In fact, I dont recall that I have ever used a repository with a standby.

In my experience, a repository is most useful in a large (tens of instances) environments for producing backup reports. For a small environment, there are really no advantages to a repository that I have found.

On Tue, Dec 10, 2013 at 9:09 AM, Chris Taylor <> wrote:

> Out of curiosity, with nightly FULL rman backups of a production database,
> why would you recommend a value greater than 7 for keep time?
> I had a hard time imagining a scenario where you'd have to go back 21 days
> for a production recovery - I'm wondering if I'm missing some technical
> aspect here...
> Thanks,
> Chris
> On Tue, Dec 10, 2013 at 9:03 AM, Tim Gorman <> wrote:
>> Coming late to the discussion, not sure if anyone else has made this
>> point...
>> Having an RMAN repository (a.k.a. recovery catalog, etc) is belt and
>> suspenders (or belt and braces for many). There is always a "recovery
>> catalog" in the target database's control files, so you've always got a
>> belt to prevent your trousers from falling. If you don't set
>> CONTROL_FILE_RECORD_KEEP_TIME to at least 21, then it's more cheap string
>> than a belt, but it's a belt.
>> A recovery catalog is a replicated copy of the recovery catalog with more
>> history, thus suspenders/braces in addition to the belt.
>> It is not technical merit, but rather personal/corporate choice, that
>> determines whether one wears one or both.

Andrew W. Kerber

'If at first you dont succeed, dont take up skydiving.'

Received on Tue Dec 10 2013 - 16:18:18 CET

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