Date: Thu, 9 Aug 2012 18:00:56 -0500 (CDT) From: Bob Friesenhahn <bfriesen@simple.dallas.tx.us> To: Daniel Kalchev <daniel@digsys.bg> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS scrub CPU bound? Message-ID: <alpine.GSO.2.01.1208091756150.18491@freddy.simplesystems.org> In-Reply-To: <5023D9B7.20001@digsys.bg> References: <5023D9B7.20001@digsys.bg>
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On Thu, 9 Aug 2012, Daniel Kalchev wrote: > > What might be there in ZFS code that is single-CPU bound? Almost certainly there is a single brain at the top to dictate the scrub algorithm. Scrub does need to proceed in appropriate order. Some things are best left for one CPU to do. It is unlikely that FreeBSD's I/O system is optimized for SSDs. Bob -- Bob Friesenhahn bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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