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From David Parker <da...@smallsolid.com>
Subject Re: Scalability of using "reference" properties
Date Tue, 15 Apr 2008 14:03:26 GMT
Could you provide a pointer to the to the data modeling tips you  


On Apr 15, 2008, at 9:14 AM, sbarriba wrote:

> Hi all,
> Last year David Nuescheler provided some very useful data modelling  
> rules – 1 of which related to the use of “reference” properties.
> We had various, reasonable, use cases for which we felt references  
> were appropriate e.g. to ensure referential integrity. While  
> semantically they’ve worked well for us, as our repositories grow in  
> size we’re now seeing how expensive references can be where you have  
> 1,000’s of items referencing the same node. Monitoring our SQL logs  
> (on MySql) we can see some pretty huge database operations which are  
> getting incrementally slower as more and more items reference a node.
> Ignoring the data modelling semantic of using “reference” properties  
> for the moment, is there anything that can be done in order to  
> improve the performance of references or do you always have to  
> design with this limitation in mind (hindsight being very useful)?
> We’re facing a tricky remodelling/migration exercise to ensure  
> further scalability.
> Regards,
> Shaun
> <mime-attachment.eml>

David Parker
(401) 263-1782

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