Date: Wed, 27 May 2009 02:37:08 +0300 From: Dan Naumov <dan.naumov@gmail.com> To: freebsd-geom@freebsd.org Subject: GELI encryption - CPU requirements? Message-ID: <cf9b1ee00905261637h248ae118i60068ab434e115be@mail.gmail.com>
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Hello (World). I am in the process of building a new system for a home NAS/webserver use and the hardware is basically this: Intel Atom 330 (1,6 Ghz, dualcore), a motherboard based on Intel D945GCLF2, 2 GB RAM. Silicon Image SIL3124 4xSATA RAID card (intended to be used in JBOD mode) 1 x 1.5 TB Western Digital Caviar Green (will get more as the need arises) A pic of the system, for the curious: http://tranquilpc.files.wordpress.com/2009/03/bbs2-pure-and-simple-storage.jpg?w=500&h=360 I have been looking into encrypting most of the system with GELI using the default 256bit AES, how big of a performance hit should I expect on this CPU? I know there is no way of giving any exact estimations without actual measurements on the given set of hardware, but either way, assuming long sequential reads or writes off a single SATA disk, what would you expect your CPU usage to be like and whats the actual read/write performance hit is likely to be? I tried googling for some "with and without GELI encryption" kind of benchmarks, but unfortunately couldn't find any. Thank you. Dan Naumov
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