Date: Fri, 23 Jul 2010 14:15:44 +0200 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-fs@freebsd.org Subject: Re: ZFS makes SSDs faster than memory! Message-ID: <i2c14p$g4f$1@dough.gmane.org> In-Reply-To: <4C496EB0.7050004@fsn.hu> References: <4C496EB0.7050004@fsn.hu>
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On 07/23/10 12:28, Attila Nagy wrote: > Hi, > > I've came across a strange issue. On a file server (ftp/http/rsync) > there is a dual SSD based L2ARC configured for a pool of 24 disks: > fetch -o /dev/null -4 > http://ftp.fsn.hu/pub/CDROM-Images/opensolaris/osol-0906-106a-ai-sparc.iso > /dev/null 100% of 493 MB 11 MBps If I understand your setup and your benchmark correctly, you are saying you have achieved 11 megabytes / s performance out of a volume of 24 RAIDZ2 drives split into two parts (so it's like RAID 60). Doesn't this number seem extremely low to you, considering that (if recent models) each of your drives can probably pull at least 70 MB/s?
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