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[Discuss] Revisiting VMWare ESX backup options
- Subject: [Discuss] Revisiting VMWare ESX backup options
- From: blu at nedharvey.com (Edward Ned Harvey (blu))
- Date: Sat, 1 Nov 2014 14:04:54 +0000
- In-reply-to: <email@example.com>
- References: <firstname.lastname@example.org> <email@example.com>
> From: discuss-bounces+blu=nedharvey.com at blu.org [mailto:discuss- > bounces+blu=nedharvey.com at blu.org] On Behalf Of Rich Braun > > AES > encryption no longer adds meaningful overhead to your operations; it's > built-in to current-generation CPUs. I've spent a good amount of time benchmarking encryption operations, and I can say this: Even without AES-NI, CPU's in general are so darn fast, there's *still* no meaningful overhead to use AES-256. A single core, circa Pentium D or Core 2, could encrypt/decrypt a 1Gbit stream without AES-NI, using only about 30% to 35% of a single core. If you have AES-NI, it comes down to about 3% to 5% CPU utilization. And of course, nowadays you always have more cores, each of which are more powerful than those I benchmarked.