Re:Announcing Micro Instances for Amazon EC2
by miyabo on Thursday September 09, 2010 @09:36AM
(#1675289)
I believe they're using chunks of RAM on each physical server to hold S3 objects. This might help explain where the "buffer/cache" is going to.
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Re:Announcing Micro Instances for Amazon EC2
by astrodust on Thursday September 09, 2010 @10:01AM
(#1675387)
That makes almost no sense. S3 is a purely network based file delivery service over HTTP, and pre-dates EC2 by a significant amount of time.
A Xen supervisor needs a fair amount of memory for its own operations, plus it can buffer the physical disks in the machine as well as any network attached storage. If these servers were also hosting S3 in their "spare time" it would degrade performance, and expose the system to potential vulnerabilities.