Date: Sun, 1 Aug 2010 15:03:49 -0700 From: David Brodbeck <gull@gull.us> To: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Typical Network Performance Message-ID: <B9E2E6DB-6E62-4FBF-B881-C9907C5516FD@gull.us> In-Reply-To: <4C55E4B5.7000201@speakeasy.net> References: <4C55E4B5.7000201@speakeasy.net>
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On Aug 1, 2010, at 2:18 PM, Jason C. Wells wrote: > I have a 100 mbps (12,207 KiB/s) home LAN in full-duplex. A 1 MiB > file transfers at 146.7 KiB/s via wput. The same file transfers at > 91.34 KiB/s via samba. That's less than 1% of available transfer > rate. Seems like my transfers are slow. I do better than that when > installing via the internet. > > Does the FTP performance compared to available bandwidth seem > right? Is the relative performance of samba to FTP right? I read a > couple quick links on the net which said, "It's complicated." Those figures do seem a little low. Some stuff to check: Are transfers in one direction a lot faster than transfers in the other? If so, the machines and the network switch may not all be agreeing on the duplex mode. Auto-negotiation sometimes fails and can lead to a lot of silent collisions, slowing things down dramatically. How about the disk you're transferring from? Is it limiting the speed? Those figures would be fairly normal for a USB 1.0 drive, for example. Are you sure all the machines involved are operating at 100 mbps? I've seen them silently fall back to 10 when there's a bad cable involved.
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