Sage-Bionetworks/Synapse-Repository-Services — pull request #97 by ezephyr (2012-09-05 21:58:21+00:00)
Title: Add an EC2IdProvider

That way, if we're on EC2, then we get an ec2 instance id, which is
unique and gives us more information. If we're not on EC2, there's
a small performance penalty, but it's one time on class load, and we
still get a unique id.