On Sun, Nov 02, 2008 at 09:37:56PM +0100, Hermann Himmelbauer wrote:
> Hi,
> In one of my Zope3 projects, I use lovely.remotetask to run specific tasks in
> background. These tasks do lengthy database operations via zope.sqlalchemy.
> Currently, lovely.remotetask seems to do a Zope3 commit() at the end of the
> task, which also does the SQLAlchemy commit.
>
> However, some tasks consist of a loop over self-contained operations,
> therefore it would be handy to commit after each such operation. This way, if
> one of the operations fail (e.g. due to some database error, such as locking,
> refrential integrity violation etc.), not the whole task is rolled back but
> only one operation. Moreover, the probability of database locks is reduced.
I've never used lovely.remotetask, but I would suggest trying:
* Have your "loop over self-contained operations" create more tasks.
* Move the loop to the application and create many tasks, one for
each operation.
--
Brian Sutherland
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