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timf/gist:3040024

Created July 3, 2012 14:24
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The EC2 and EBS APIs are implemented on multi-Availability Zone
replicated datastores. These datastores are used to store
metadata for resources such as instances, volumes, and
snapshots. To protect against datastore corruption, currently
when the primary copy loses power, the system automatically flips
to a read-only mode in the other Availability Zones until power
is restored to the affected Availability Zone or until we
determine it is safe to promote another copy to primary. We are
addressing the sources of blockage which forced manual assessment
and required hand-managed failover for the control plane, and
have work already underway to have this flip happen
automatically.
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timf commented Jul 3, 2012

Quote from: http://aws.amazon.com/message/67457/

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