Google's open source application deployer explained

Google talks about Slack at the Australian Unix Users Group in Oct, 2006.

From the article: "Slack is a source deployment system and it's the way we install applications on servers," Still said, adding Slack is based around a centralized configuration repository which is then deployed onto selected machines in a "pull" method. Each of the "worker" machines asks for its new configuration regularly or when a manual command is run.

[slashdot.org]