Date: Sat, 18 Feb 2017 04:41:00 +0100 From: Sydney Meyer <meyer.sydney@googlemail.com> To: freebsd-net@freebsd.org Subject: Re: Slow Download Speeds from AWS S3 Message-ID: <7D26AA10-4A9A-47F8-8D6D-380FCC2A0071@googlemail.com> In-Reply-To: <DE9B0F39-A8AD-4DEF-8296-62F37DA27CF0@googlemail.com> References: <A6482775-D7F8-4FB8-9423-257D6D625D01@googlemail.com> <18e49da9-47eb-1803-e223-b4385e7d8690@multiplay.co.uk> <30F9FC69-CEBE-4CBE-93A9-DEDBD053C6C6@googlemail.com> <77fc04b6-380e-8826-3e43-5d820840e26c@multiplay.co.uk> <DE9B0F39-A8AD-4DEF-8296-62F37DA27CF0@googlemail.com>
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Here is a 100MB random file in the Frankfurt region: http://s3.eu-central-1.amazonaws.com/43cf34497f/random.raw Sydney > On 18 Feb 2017, at 04:31, Sydney Meyer <meyer.sydney@googlemail.com> = wrote: >=20 > Hi Steve, >=20 > sure, but i have deleted the bucket already.. i'll set a new one up = quickly.. do you have a specific aws region which you prefer? >=20 > Sydney >=20 >> On 18 Feb 2017, at 04:26, Steven Hartland <killing@multiplay.co.uk> = wrote: >>=20 >> Hey Sydney, I've had some feedback from other team members and armed = with this info I'm having a crack at enabling receive buffer = auto-scaling using RTT estimations when timestamps aren't available. >>=20 >> I don't have any S3 buckets to tests with so Is there any chance you = pop up your test file again for me? >>=20 >> Regards >> Steve >>=20 >> On 16/02/2017 16:55, Sydney Meyer via freebsd-net wrote: >>> Hi Steve, >>>=20 >>> increasing the buffer size did indeed enhance throughput. >>>=20 >>> 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. >>>=20 >>> I found this thread on the ML and i'm reading myself a bit more into = the topic right now. >>>=20 >>> = https://lists.freebsd.org/pipermail/freebsd-net/2014-August/039495.html >>>=20 >>> Thank you for your tip, however.. >>>=20 >>> Sydney >>>=20 >>>> 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" >>>> _______________________________________________ >>>> 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" >>> _______________________________________________ >>> 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" >=20
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