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A comment on Tips to reduce Amazon ec2 costs. Parent comment

Re:Tips to reduce Amazon ec2 costs by spudlyo on Monday March 15, 2010 @12:29PM (#1193318)
Right. Although it wasn't clear what exactly they meant by using a CNAME. They could have cleared it up greatly by saying using a CNAME to the official DNS name of the elastic IP, i.e. ec2-75-101-137-243.compute-1.amazonaws.com.
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Re:Tips to reduce Amazon ec2 costs by OmarIsmail on Monday March 15, 2010 @01:40PM (#1193510)
You can also use the internal IP address of the machine. i.e. with Windows instances if you do an IP Config you'll see an address to the effect of 10.X.X.X. Instances in the same availability zone can communicate with one another using these IP addresses without leaving the network. This saves dramatically on costs and performance.
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Re:Tips to reduce Amazon ec2 costs by spudlyo on Monday March 15, 2010 @02:16PM (#1193626)
Sure, you can do that, but hard coding ephemeral IP addresses into your configuration is still problematic.
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