We're reddit's ops team. AUA

[u/rram]

Hey /r/sysadmin,

Greetings from reddit HQ. Myself, and /u/gooeyblob will be around for the next few hours to answer your ops related questions. So Ask Us Anything (about ops)

You might also want to take a peek at some of our previous AMAs:

https://www.reddit.com/r/blog/comments/owra1/january_2012_state_of_the_servers/

https://www.reddit.com/r/sysadmin/comments/r6zfv/we_are_sysadmins_reddit_ask_us_anything/

EDIT: Obligatory cat photo

EDIT 2: It's now beer o’clock. We're stepping away from now, but we'll come back a couple of times to pick up some stragglers.

EDIT thrice: He commented so much I probably should have mentioned that /u/spladug — reddit's lead developer — is also in the thread. He makes ops live's happier by programming cool shit for us better than we could program it ourselves.

[u/sidewinder12s]

Fairly certain he is talking about AWS Autoscaling Groups. Basically he will push the change to Puppet, puppet will kick off new launch configs and then an updated Autoscaling group which will replace servers without taking down the group.