Date: Thu, 16 Feb 2017 17:55:51 +0100 From: Sydney Meyer <meyer.sydney@googlemail.com> To: freebsd-net@freebsd.org Subject: Re: Slow Download Speeds from AWS S3 Message-ID: <30F9FC69-CEBE-4CBE-93A9-DEDBD053C6C6@googlemail.com> In-Reply-To: <18e49da9-47eb-1803-e223-b4385e7d8690@multiplay.co.uk> References: <A6482775-D7F8-4FB8-9423-257D6D625D01@googlemail.com> <18e49da9-47eb-1803-e223-b4385e7d8690@multiplay.co.uk>
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Hi Steve, increasing the buffer size did indeed enhance throughput. I am obviously not an expert in this field, but i don't understand why = or if the TCP Receive Window Size shouldn't increase automatically. I found this thread on the ML and i'm reading myself a bit more into the = topic right now. https://lists.freebsd.org/pipermail/freebsd-net/2014-August/039495.html Thank you for your tip, however.. Sydney > On 16 Feb 2017, at 16:35, Steven Hartland <killing@multiplay.co.uk> = wrote: >=20 > Window scaling and receive buffer scaling is the most likely cause. >=20 > Check what the sysctl net.inet.tcp.recvspace is set to, then try = increasing it e.g. > sysctl net.inet.tcp.recvspace=3D655360 >=20 > This jumped the transfer rate with a wget and your test URL from 3MB/s = to 30MB/s here. >=20 > Regards > Steve >=20 > On 16/02/2017 14:34, Sydney Meyer via freebsd-net wrote: >> Hello, >>=20 >> I'm seeing continuous slow download speeds from Amazon S3, but only = on FreeBSD. Other OSes saturate the connection without problems. >>=20 >> This happens with 10.3-RELEASE and 11.0-RELEASE and only with AWS S3 = in different regions (Ireland, London, Frankfurt, US Standard have been = tested) whilst using fetch, curl, et. al. >>=20 >> I have tested this on multiple machines, bare metal, bhyve, Xen and = VMware VMs, routed setups and direct pppoe links.. all the same. >>=20 >> Anyone seeing similar issues? >>=20 >> Here's a url to try: >>=20 >> = http://s3.eu-central-1.amazonaws.com/4f48caf1d8bcbef8/c5b38f8b3625d2b6/zer= ofile.raw >>=20 >> Also, when doing double NAT, i.e. VMware Fusion FreeBSD Guest with = "Share with my Mac"-Interface, the machine is doing completely fine, as = in saturates the link, 90Mbps otherwise between 12-15Mbps.. >>=20 >> I also switched the FreeBSD Routers with Linux-based ones and with = the isp-provided router box, with the same result. >>=20 >> I have launched VMs with Digital Ocean to "rule out" my ISP and there = seems to be the same issue. Downloading from S3 is multiple times slower = than any other connection to services outside of S3 or on any other OS. >>=20 >> It seems like other people are seeing the same issue: >>=20 >> https://forums.freebsd.org/threads/59756/#post-343064 >> _______________________________________________ >> freebsd-net@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-net >> To unsubscribe, send any mail to = "freebsd-net-unsubscribe@freebsd.org" >=20 > _______________________________________________ > freebsd-net@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"
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