Simon Willison’s Weblog

uuidd.py. Neat implementation of an ID server from Mike Malone—it serves up incrementing integers over a socket (using Python’s asyncore for fast IO) and records state to a file only after every 10,000 IDs served, so most of the time it’s not reading or writing to disk at all. If the server crashes it doesn’t matter because it can start up again at an integer it’s sure hasn’t been used before.