zodb & multiple processes

[Kapil Thangavelu]

yes the zodb is thread safe (zope is multithreaded). it actually makes
programming
multithreaded programs a bit easier as objects which inherit from the
persistent classes
become thread safe (although it assumes a bit optimism regarding the rate of
object changes,
the optimism won't corrupt your data but its something to be aware of).

as long as your're objects are not changing frequently its a pretty good way
to avoid lots of
concurrency control around your objects.

currently the zodb assumes a process lock on a particular zodb storage. if
you want to run it with
multiple processes you can use ZEO, which is a bit heavyweight if you want
your app to run on
one machine as it communicates over tcp/ip.

for more info check out jim fulton's IPC 8 paper on zope.org and amk's
starship homepage.

kapil


Erno Kuusela <erno-news at erno.iki.fi> wrote in message
news:kuhf36hotz.fsf at lasipalatsi.fi...
> hello,
>
> from the looks of things, zodb is thread-safe in that you can use
> connections to the same storage from many threads at once and
> have it not break.
>
> how about multiple processes? will it just work, just not work,
> or require special incantations?
>
>   -- erno