Don't know if this belongs on the list or not... I've just written a python monitoring program for baby-sitting a bunch of servers (I wanted something easier to setup and maintain than Nagios)... but the inevitable has happened, and I want to make a go-cart run like a ferrari. I was thinking of using python's interface to 'select' a la Medusa, but as soon as I saw 'import asyncore', I thought "There's got to be a better way..." Enter twisted. I would like to be able to run n monitoring instances simultaneously (thus my interest in 'select') to make the code as close to real-time as is practical. However, this is my first dive into POSIX I/O at this level (I ordered a copy of "UNIX Systems Programming" (Robbins) yesterday, to help me learn and adjust). * The monitoring libs that I've put together do everything from local process monitoring (crap like ps with commands.getoutput), httplib checks against sites, process checks on remote servers (ssh+ps with commands.getoutput), ping checks, etc. * An instance of the monitoring class will only do one type of monitoring (either process check, remote process check, ping check, or site check) I would like to write a version of this that's a twisted application, in the hopes that it will be more robust and enterprise-ready. I've started looking at the following: twisted.application.service.IProcess twisted.application.service.Process and spawnProcess from twisted.internet.default.PosixReactorBase But I am not sure how to get started yet... I want to write something that can be run with twistd. Can anyone offer guidance or suggestions as to the approach? Right now, I am locked on the example here: http://twistedmatrix.com/documents/current/howto/application.html ... Is this what I should be looking at for inspiration? Or another approach all together? I've not come across examples of twisted apps that are a narrow specialization like what I have in mind... the app would be a *kind* of server... that would regularly spawn processes and wait for return data, regularly instantiate python monitoring classes. Am I thinking of this in a sane way? Thanks for any input, Duncan -- Duncan M. McGreggor mailto:duncan@adytum.us Systems & p 301.698.5032 Applications Engineer http://adytum.us AdytumSolutions, Inc.