Date: Mon, 28 Mar 2011 18:57:35 +0100 From: "Clayton Milos" <clay@milos.co.za> To: <pjd@freebsd.org> Cc: freebsd-stable@freebsd.org Subject: GELI speed Message-ID: <C07A16DB9A6B45D9B1C0D0722B28B3D4@claydesktop>
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Hi Pawel I'm running GELI encryption on a hardware RAID5 (8x1TB), formatted to 6.3T usable space using i386 FreeBSD 7.3-PRERELEASE. Write speeds to the drive are just over 40MB/s which is not too bad but I would like to improve it as the drive gets 270MB/s without encryption. I've run the following tests: dd if=/dev/gzero.eli of=/dev/null bs=1m count=4096 4294967296 bytes transferred in 99.763266 secs (43051591 bytes/sec) and then dd if=/dev/zero of=test.file bs=1m count=1024 1073741824 bytes transferred in 26.118988 secs (41109626 bytes/sec) There is not much speed lost due to the filesystem throughput or the RAID card. I have 2 AMD Opteron 248 (2205.02-MHz 686-class CPU) in the box. I have just bought another motherboard that will accept dual-core and intend on upgrading to 2 dual core CPU's. My next step is to install AMD64 FreeBSD 8.2 to see if this improves performance any. I did not install AMD64 originally because it was giving some issues and I didn't have time to debug it. Will AMD64 have any speed improvement on encryption processing, being 64 bit? Also will having more cores help if I am using the box as a Samba share? I have a Cavium 1230 and Cavium Nitrox XL encryption cards available to me. So far I cannot see any drivers available for them for FreeBSD and even with the SDK I could not write a driver as my knowledge of C is not very good. Would these cards or another supported encryption card that can do AES-CBC 128 help with the speed? Is the GELI provider able to take advantage of encryption coprocessors? Thanks Clay
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