Date: Wed, 30 Mar 2011 01:48:48 +0100 From: "Clayton Milos" <clay@milos.co.za> To: "Clayton Milos" <clay@milos.co.za> Cc: pjd@freebsd.org, freebsd-stable@freebsd.org Subject: Re: GELI speed Message-ID: <4E14579005B647BB932C09347031544B@claydesktop> References: <C07A16DB9A6B45D9B1C0D0722B28B3D4@claydesktop><4D917547.7050908@rdtc.ru> <7891ACBE8A1D4A71BEFEAA7D98A7591B@claydesktop>
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>> On 29.03.2011 00:57, Clayton Milos wrote: >>> 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. >> >> You can also try increase reading performance by using geom_cache >> with sufficiently large cache. It won't impact on linear reads >> but for general operations like directory lookups, many short reads etc. >> it can decrease number of decrypt requests. >> >> Eugene Grosbein >> > > Thanks Eugene. unfortunately I have some large directories with ~2000 > files in them so if that slowed down it would be painful. > > Clay I've upgraded to i386 8.2-RELEASE as the amd64 version was still crashing. It could be a hardware incompatability with the HADMA motherboard. Now on 8.2-RELEASE when I run "geli onetime -s 4096 gzero" it crashes the box with a kernel fault. Clay
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