In fact the code I use to perform concurrent processing from a disk- based request queue is available here, http://www.psychofx.com/directory_queue_service/
Feedback welcome.
Cheers, Chris Miles
On 19 Sep 2007, at 11:57, Chris Miles wrote:
I've done something very similar. I control the number of concurrent child processes by simply keeping a counter of how many are active at any one time. The main loop that polls a queue will only accept new jobs if the counter is less than the configuration- defined limit.
I didn't find anything Twisted-specific to limit the number of forked processes, but it was easy to implement in my own logic.
Cheers, Chris
On 19 Sep 2007, at 11:26, Daniel de la Cuesta wrote:
Hi,
I am developing a video conversion server. To process the video conversion I use the method "getProcessOutput" to call "ffmpeg".
The user upload the video using a HTTP POST and each video must be converted to 8 or 10 output formats.
Currently, all the conversions for each video are processed in parallel, what I want to do is to control the number of parallel system calls to "ffmpeg". For example I only want 2 processes at the same time and when one of them finishes the next process start.
How can I do that?
Is there any function in Twisted that implements that?
Thank you