Andy Leszczynski wrote: > > I need to now option I open the Berkley DB (both db and env) to have > configuration for multiple writers and multiple readers. Via multiple > processes and multiple threads. No trx needed.
the simple answer is you can't. bdbm is probably single writer multiple reader. I believe if you use of the the most recent sleepy cat database, you have support for multiple readers and writers in any context. when I did this, I stuck my gdbm database into a multithreaded stand-alone process. I used XML RPC for access and used a per key locking mechanism internal to the data storage and retrieval process. This locking mechanism set appropriate locks so that a writer for specific key would wait for all readers of that key to finish, and block all subsequent readers until it was done. so far is working pretty well but I haven't tried it in a high load situation. ---eric -- http://mail.python.org/mailman/listinfo/python-list
