Date: Sun, 31 May 2009 17:47:33 +0300 From: Dan Naumov <dan.naumov@gmail.com> To: Ronald Klop <ronald-freebsd8@klop.yi.org> Cc: =?ISO-8859-1?Q?Morgan_Wesstr=F6m?= <freebsd-stable@pp.dyndns.biz>, freebsd-stable@freebsd.org Subject: Re: ZFS on top of GELI / Intel Atom 330 system Message-ID: <cf9b1ee00905310747l71ef2679t26503188f9857bb7@mail.gmail.com> In-Reply-To: <op.uuss79bt8527sy@82-170-177-25.ip.telfort.nl> References: <cf9b1ee00905290119w5eea0bfmd018d1c1282ac310@mail.gmail.com> <4A1FAB45.4040904@h3q.com> <cf9b1ee00905290312j2d1aeda8y3e4d8f4b1a0492f5@mail.gmail.com> <4A1FBD4A.5080204@pp.dyndns.biz> <cf9b1ee00905290434t4918fb95p9aec8e4253249f4e@mail.gmail.com> <op.uuss79bt8527sy@82-170-177-25.ip.telfort.nl>
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I am pretty sure that adding more disks wouldn't solve anything in this case, only either using a faster CPU or a faster crypto system. When you are capable of 70 MB/s reads on a single unecrypted disk, but only 24 MB/s reads off the same disk while encrypted, your disk speed isn't the problem. - Dan Naumov On Sun, May 31, 2009 at 5:29 PM, Ronald Klop <ronald-freebsd8@klop.yi.org> wrote: > On Fri, 29 May 2009 13:34:57 +0200, Dan Naumov <dan.naumov@gmail.com> wrote: > >> Now that I have evaluated the numbers and my needs a bit, I am really >> confused about what appropriate course of action for me would be. >> >> 1) Use ZFS without GELI and hope that zfs-crypto get implemented in >> Solaris and ported to FreeBSD "soon" and that when it does, it won't >> come with such a dramatic performance decrease as GELI/ZFS seems to >> result in. >> 2) Go ahead with the original plan of using GELI/ZFS and grind my >> teeth at the 24 MB/s read speed off a single disk. > > 3) Add extra disks. It will speed up reading. One disk extra will about > double the read speed.
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