Antal Rutz wrote: > Hi, All! > > I'm new to threading. I have some design questions: > Task: I collect data and store them in an RDBMS (mysql or pgsql) > > The question is how to do that with threading? > The data-collecting piece of the code runs in a thread. > > 1. Open the db, and each thread writes the result immediately. > (Sub-question: which is better: cursor object passed to the thread > or stored in a global var.) > 2. Threads return data, which is written to DB after that. > 3. Threads write to global variable, after 'join()' data is written. > (Can be used global (write-only) variables with threads at all?) > 4. ?...
I'm not sure why you need threading at all here, but I would avoid both globals and passing cursors between threads. I don't think all DB-API implementations can handle threading properly. I suspect it might be useful to do data collection in one thread, DB communication in another, and to use a Queue.Queue object to pass data from data collection to DB insertion thread. -- http://mail.python.org/mailman/listinfo/python-list
