Possible intermittent downtime, Network Changes Options

[helvick]

All,

We have to implement an ip-address change on the server over the next 12 hours or so. The board may be unreachable briefly in an hour or so and there may be some DNS issues over the next 24 hours. There should not be any extended outages of more than 5 minutes at any point, and I'm hopeful that there wont be any noticeable downtime at all. I've set the DNS TTL to 15 minutes as an advance step, and will be reducing that to 5 minutes for the hour or so around the change. This _should_ propagate out and make it fairly painless.

I'll post an update once the change has been made, or let you know that we've postponed the change if there are any issues that crop up and prevent us switching over.

JoeM

[imipak]

My dear helvick, the happiness from finding UMSF is back far outweighs any minor inconvenience from a couple of hours' downtime!

Many thanks to you and everyone who pulled this off. A minor timing glitch like that is small potatoes compared to some of the nightmares I've witnessed on systems serving rather more people than UMSF. That sort of operation is never trivial, especially when circumstances are forcing your hand and the clock's ticking. (Not that I know of any large web filtering service providers that had to make pre-Olympics capacity upgrades across a dozen data centres worldwide, at the same time as moving a bunch of critical centralised (non-redundant) systems 30 miles in the back of a truck without downtime, and finally completed the job last Thursday evening, or anything... )