Hosting is hard. Five nines is a myth. Twitter is down, btw.

This is what Twitter’s homepage looks like today:

2012-07-26_12-27-28

Their maintenance notice is broken too:

Twitter is currently down for <%= reason %>.

We expect to be back in <%= deadline %>. For more information, check out Twitter Status. Thanks for your patience!

Google has been experiencing outages as well, with their Google Talk service:

2012-07-26_12-38-05

This once again reminds us that running a complex distributed system is hard, and 100% guaranteed uptime, all the time, is not commercially or technologically feasible – just ask Amazon (and Netflix, Instagram, and Pinterest) about recent power outages.

SLAs are useless.  If you use cloud hosting providers, you should focus on designing your apps for failure.  

 

 

 

 

Technologist, parallel entrepreneur. Interests: travel, photography, big data, analytics, predictive modeling.

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One comment on “Hosting is hard. Five nines is a myth. Twitter is down, btw.
  1. Blaine Kohl says:

    The Go Daddy-serviced sites going down today, http://news.cnet.com/8301-1009_3-57509753-83/go-daddy-serviced-web-sites-go-down-hacker-takes-credit/, was a lovely experience as well. Companies wasting time trying to debug why their email wasn’t working only to discover that it was yet another Go Daddy problem.

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