Re: [dev] IStorage.lastOID() proposal (was Re: [dev] RFC IMVCCStorage everywhere (Move ZODB's MVCC to storage layer))

On Fri, 17 Jun 2016 07:47:22 -0400,
Jim Fulton <[email protected]> wrote :
> This is an interesting approach. I doubt that you can have truly
> failure free transactions. Network or servers can fail.  Presumably
> the probability of failure is very low.  I doubt the risk of a random
> oid collision would increase the chance of failure significantly. Even
> if you had several billion objects in your database, the chance of a
> collision would less than one in a billion (assuming you're adding a
> single object).

IIRC, Julien needed to be sure the action was not replied, with the
drawback that it may fail on its one execution. Then there was some
out-of-zope-transaction-manager ways to later (hours, ...) detect if
nothing happened, and trigger another single call.
-- 
Vincent Pelletier
ERP5 - open source ERP/CRM for flexible enterprises

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