Date: Wed, 27 May 2009 02:00:34 +0100 From: RW <rwmaillists@googlemail.com> To: freebsd-geom@freebsd.org Subject: Re: GELI encryption - CPU requirements? Message-ID: <20090527020034.1087a542@gumby.homeunix.com> In-Reply-To: <cf9b1ee00905261637h248ae118i60068ab434e115be@mail.gmail.com> References: <cf9b1ee00905261637h248ae118i60068ab434e115be@mail.gmail.com>
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On Wed, 27 May 2009 02:37:08 +0300 Dan Naumov <dan.naumov@gmail.com> wrote: > 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) > > 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? Probably quite significant for some disk operations. I have a 4 year old 2.8 GHz single-core amd64 running i386 and I see ~100% cpu utilization when copying large files between two geli partitions. If you haven't already bought it you might want to look at cpus with AES hardware acceleration.
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