Re: Real life implementation of 7 year data retention requirement

From: Fergal Taheny <>
Date: Thu, 13 Feb 2014 21:09:49 +0000
Message-ID: <>


From the original post

"We are asked to implement a database backup policy so that the state of database can be resurrected to any given point in time up to past 7 years"

I think the words "database backup policy" should be replaced with "data retention policy". I don't believe backups are the way to meet this requirement. I think a data warehouse is the way to go.

And for the requirement to be able to present your data as it was at any historical point in time there is a great data model and methodology called data vault which is designed to do just that.

See here:


On 13 February 2014 20:40, Dennis Williams <>wrote:

> Paresh,
> There is something magical that enables many businesses to meet the 7 year
> data retention. Two pieces of magic. The first is the magic of decreasing
> storage costs. Second, the magic of database indexes. From what I've seen,
> most businesses just never delete old data from their production database.
> Now, if you retire a database, and are required to maintain access, then
> you have some of the issues discussed here - obsolete hardware, obsolete
> database versions, etc. You may keep the database offline, but bring it
> back up, upgrade the Oracle version, back it up, then take it offline.
> The original poster on this discussion described something even more
> daunting -- the requirement to recover the database to a point at any time
> over those years. That is very challenging. Probably a manager who doesn't
> understand what would be required technically. Perhaps if presented with
> the requirement to hire two more DBAs to meet that requirement, common
> sense may prevail.
> Dennis

Fergal Taheny
Pentec IT Limited
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Received on Thu Feb 13 2014 - 22:09:49 CET

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