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A comment on Moz Dumps Amazon Web Services, Citing Expense and 'Lacking' Service. Parent comment

Re:Moz Dumps Amazon Web Services, Citing Expense and 'Lackin... by dsl on Friday January 31, 2014 @12:05AM (#7155369)
It may or may not be the same issue, but from what I have been able to gather a modification of a security group is basically a "delete, recreate, repopulate" operation. All of our intermittent network issues could be reasonably tied back to SG modifications.
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Re:Moz Dumps Amazon Web Services, Citing Expense and 'Lackin... by fbags on Friday January 31, 2014 @12:53PM (#7157954)
That's a different issue. This one is instances that are launched into an sg that is then left unmodified. If there are a moderate to large number of instances in that sg, intermittent network connectivity problems will ensue.

The issue you mention (where you have to treat sg's as being immutable if you want them to work reliably) is another problem with the sg's.

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