Re: New SimpleORM Whitepaper

--- In [email protected], Anthony Berglas <anthony@...> wrote:
>
> Over the last few days I have been completely reworking the white 
> paper.  And as I do so, I review the code and design and test 
> cases.  It is all looking quite good.
> 
> I am most of the way through it, and have attached the current 
> version.  Please read through it and tell me what you think.  What's 
> wrong, what's missing, what's superfluous.
> 
> It is currently checked in under 
> simpleorm\trunk\simplewebapp\common\doc\simpleorm-webSite.  (I need 
> to reorganize this when we make the Franck branch the main 
> branch.)  I just edit it with Komposer, but any lightweight editor 
> will do (not MS Word!).
> 
> The most substantial change to SimpleORM as a result of the review is 
> changing the default locking mode from SFOR_UPDATE to 
> SBASIC.   Optimistic locking is always performed.  This felt more 
> natural to me, but maybe SFOR_UPDATE would be better given that it is 
> mainly used for transactional processing.  But we don't want to lock 
> too much.  Opinions welcome.  We could also make the default mode 
> settable on the session, but we really do not want too many modes and 
> options -- hard to test etc.
> 
> Regards,
> 
> Anthony
> 
> Dr Anthony Berglas, anthony@...       Mobile: +61 4 4838 8874
> Just because it is possible to push twigs along the ground with ones
nose
> does not necessarily mean that is the best way to collect firewood.
>

Hi,

I welcome this change; I am heavily using Oracle with SimpleOrm
(storing and serving a few ten of thousands of biological results in 
an 900 bed hospital), and every now and then, (once every month in
average) Oracle entered in a deadlock. I resolved the problem by
subclassing the Oracle driver and disabling locking, and then I
used the modified driver.
Otherwise SimpleOrm works quite well for me.

Best regards,

Harry


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