Grouper Developers Forum

[Tom Barton <>]

For audit, the first order of business is to preserve the information, 
and for that purpose (alone) we don't need to store the info in both a 
group-centric and a member-centric way.

Actually answering point-in-time questions should be of rather low 
frequency compared to using the info for incremental change 
notification, and it's only the latter that has a need for low latency.

So I think we can pick the single representation (group-centric or 
member-centric) best suited to sensibly representing changes. And since 
not all changes to group info are membership related, it looks like 
group-centric is the only single one that meets the need.

Tom

Tom Zeller wrote:
> On Tue, Jun 10, 2008 at 10:12 AM, GW Brown, wrote:
>
>
>     --On 10 June 2008 09:17 -0500 Tom Zeller 
> <
>     
> <mailto:>>
>  wrote:
>
>
>         Representing changes from a group-centric point of view via LDIF
>         seems
>         straightforward, but what about member-centrically ? e.g. how
>         someone's
>         group memberships have changed.
>
>     What is the context here? Are we back to the subject id changing or
>     is this to make it easier to query from a member point of view i.e.
>     show me all the memberships for 'x' on a given date?
>
>
> The latter, make it easier/possible to query changes from a member point 
> of view.
>  
>
>
>         If the actual change definitions  - the LDIF or whatever format
>         we use - for a group can be queried using 'like' we could have
>         an inefficient means of finding relevant changes which would
>         allow us to compute a subject's memberships at a given point in
>         time.
>
>
> I agree: querying LDIF via SQL seems inefficient, perhaps even improper.
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