-----Original Message----- From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] On Behalf Of Wietse Venema Sent: Saturday, 31 August 2013 2:56 AM To: Postfix users Subject: Re: Re-inventing TCP (was: newbie check..)
>Terry Gilsenan: >> I have done testing with file transfers using both TCP and UDP, >Wietse >> Would not the same result be achieved by disabling TCP congestion >> control? I am not implying that doing so is a good idea. >Terry Gilsenan: >> That could have disastrous consequences for the rest of the traffic on > >that link. >Indeed, and what congestion control mechanism were you using? I was using simple port based QoS using TC. The killer on high latency links is the tcp-window and the continual wait for ack. With links above 1000ms this compounded delay reduces the available bandwidth to a very small percentage of the interface speed (eg:256kbps on a 2mbps link). Without this I have seen UDP data streams that will approach the actual interface speed. (eg: 1.8mbps on a 2mbps link) ===[Disclaimer]=== This electronic transmission, including any attachments, is confidential, may contain privileged information and should be read or retained only by the intended recipient. If you received this message in error, please delete it from your system and notify the sender immediately. Any review, dissemination or other use of this information by persons or entities other than the intended recipient is strictly prohibited. ===[End]===
