First up today is the story pondering whether green requirements will hurt co-location providers. There are a couple of things to look at here. First, co-location facilities can’t cut “their” power usage unilaterally. You can’t expect co-lo facilities to cut their power usage the way other facilities can because they don’t have control over the equipment housed there (metered power is the best way to encourage green behavior). Second, claiming that co-lo’s aren’t reliable because one had 2 generators fail (but kept the customers running from the 3rd) is ridiculous. That’s why you have n+1 (or n+2 in this case) for one of the most fallible pieces of equipment in the data center. It’s a little disconcerting they went that deep into the redundancy, but even the big boys have trouble with generators (witness IBM and Air New Zealand last year).
Next up is the post mortem on the Google AppEngine power failure. It’s bad enough to have the power failure in the first place, but not to have anyone who knew enough about the system to make a sensible decision to failover to backup is just silly. When in doubt, you can never go wrong failing over to backup (unless your backup dies too).
Stay tuned this week for an article on diagnosing cloud computing failures and reducing the impact of them!
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