Thanks, Glenn, for your insight. Here's mine...
Glenn wrote:
>
>I don't think [O-R mapping] would not be any easier using
>fine-grained entity beans.
Please explain.
>Coarse grained object graphs allow us more control over how
>we query our RDBMS.
Please explain.
>I would like to hear from Chip from ObjectSpace about atomicity
>in the ODBMS world. I suspect that a single update of the entire
>object graph would be considered an atomic transaction.
Sunlab's PJama, a transparent serialized-persistence-by-reachability
engine, is fashioned such that "stabilisation of a snapshot is also
the foundation of transactions". I guess that means fine-grained
transactions won't perform well with large graphs of mostly unmodified
objects. So persistence, transactions, and graph granularity *are*
inter-related, as a claimed before. I got the quote from:
http://www.sunlabs.com/research/forest/COM.Sun.Labs.Forest.doc.pos7.abs.html
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