http://www.networkworld.com/article/2866950/cloud-computing/which-cloud-providers-had-the-best-uptime-last-year.html
By Brandon Butler
Network World
Jan 12, 2015
Amazon Web Services and Google Cloud Platform recorded impressive
statistics for how reliable their public IaaS clouds were in 2014, with
both providers approaching what some consider the Holy Grail of
availability: five nines.
Flash back just to 2012 and pundits bemoaned the cloud being plagued with
outages - from one that brought down Reddit and many other sites to the
Christmas eve fiasco that impacted Netflix. It was a different story last
year.
Website tracking firm CloudHarmony monitors how often more than four dozen
cloud providers experience downtime. The company has a web server running
in each of these vendors’ clouds and tracks when the service is
unavailable, logging both the number and length of outages. The science is
not perfect but it gives a good idea of how providers are doing. And
overall, vendors are doing well and getting better.
Amazon and Google shone in particular. Amazon’s Elastic Compute Cloud
(EC2) recorded 2.41 hours of downtime across 20 outages in 2014, meaning
it was up and running 99.9974% of the time. Given AWS’s scale - Gartner
predicted last year that Amazon had a distributed system that’s five times
larger than its competitors - those are impressive figures.
[...]
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