Hiya,   I'm hoping for opinions on using an io_service per core against a single io_service with multiple threads (similar to HTTP Server examples 2 & 3). The application is a TCP authentication / proxy server, intended to use all available cores.   - The TCP streams consist of small messages (usually a few hundred bytes) which can individually be processed quickly.  - Connections themselves are fairly long lasting - average around 4 hours, although occasionally up to 10-12 hours.   We're looking for a 'shared nothing' design between threads - database queries can be made per-thread (using TLS), for example.    The application is written for Redhat Linux - I'm unsure if it makes a difference.   Any suggestions are much appreciated!   Cheers Jim