Paul,
Thanks for the article. Interesting. The server will be an AMD with AES extensions, but I wonder how that same machine in the article would have performed with a hardware raid controller verses using a software raid. I know certain raid configurations are a bit faster with the software raid but I would imagine this is not one of them. If the server has the basic over-head of encryption on top of the over-head of managing raid on top of the over-head of managing the LVM I could see a lot more CPU use than if the CPU was only dealing with encryption on a hardware raid without LVM.
Nathan On 4/2/2013 9:11 AM, Paul Mooring wrote:
Not really, encrypting data has overhead in terms of CPU: Benchmarks are generally awful as you care about real world impact (like it use to take .3 seconds now it takes .5) and benchmarks are the quickest route to getting hung up on theoretical numbers rather than worthwhile metrics. That being said, here's one anyway: http://dentarg.it64.com/content/luks-ext4-performance
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