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[ncc-services-wg] Re: [db-wg] Clean up of unreferenced person/role objects
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Denis Walker
denis at ripe.net
Thu Apr 19 19:04:08 CEST 2007
Shane Kerr wrote: > All, > > On Wed, Apr 18, 2007 at 01:34:54PM +0200, Denis Walker wrote: > >> The worst problem that can occur is that someone will enter a >> reference to their person/role object just as we delete it. However, >> as we are only deleting unreferenced person/role objects, the time >> needed to re-create them is minimal. We suspect that a very large >> proportion of the unreferenced person/role objects that we will be >> deleting are abandoned objects that are no longer used. >> > > A bit of thinking can come up with some scenerios that might be > worse(*). > > I definitely think any minor problems are more than outweighed by the > removal of unused personal data! > > -- > Shane > > (*) For example, a worse problem would be referencing the wrong > person/role object. This can happen like so: > > - Person object X created > - Months pass... > - Person object X deleted by this process > - Person object Y created with same "nic-hdl:" as object X > - User who created person object X decides to use it, but actually > refers to object Y (since it has the same "nic-hdl:") > > The user who created person object X assumes it is still fine, because > the usual notification was not received, and in any case it was > probably protected by "mnt-by:". > > Of course, this is an unlikely corner case. :) > This case can already occur: - Person A creates object X without "mnt-by:" - Months pass... - Person B thinks he creates object Y with same "nic-hdl:" as object X - Person B actually modifies object X and changes it into object Y - Person A who created person object X decides to use it, but actually refers to object Y (since it has the same "nic-hdl:") Person A who created person object X assumes it is still fine, because he did not maintain his data and did not include a "notify:" attribute. This is also an unlikely corner case, but the first part does occasionally happen. denis
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