Date: Wed, 09 Jun 2010 12:44:39 +1000 From: Andrew Snow <andrew@modulus.org> To: "Bradley W. Dutton" <brad@duttonbros.com>, freebsd-fs@freebsd.org Subject: Re: ZFS performance of various vdevs (long post) Message-ID: <4C0F0017.5000002@modulus.org> In-Reply-To: <20100608082006.5006764hokcpvzqe@duttonbros.com> References: <20100607154256.941428ovaq2hha0g@duttonbros.com> <alpine.GSO.2.01.1006071811040.12887@freddy.simplesystems.org> <20100607173218.11716iopp083dbpu@duttonbros.com> <20100608044707.GA78147@icarus.home.lan> <20100608082006.5006764hokcpvzqe@duttonbros.com>
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Under opensolaris, the LSI-based controllers seem to use interrupt coalescing, and you can even tweak the settings via lsiutil. When you disable it, things go alot slower. I suspect this is the reason for the speed difference of sequential transfer rates vs FreeBSD. - Andrew
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