From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail2.tohojo.dk (mail2.tohojo.dk [77.235.48.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 3287A3B25D for ; Wed, 25 May 2016 12:33:27 -0400 (EDT) X-Virus-Scanned: amavisd-new at mail2.tohojo.dk DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=toke.dk; s=201310; t=1464194004; bh=wI/V0/vDXCLgt1yHGvk/nCB1JnW4zrlizS6LLWyAnSc=; h=From:To:Subject:Date; b=E/Jwp7NFffGDmM7F7DveoqqSWqrwmK5o3YKyatmkc3A/oKuo76+4eQuXzsMuveH2m T0W4FRJZI4GGtxzkuXyfkvIH8+C4A7uKM+hDvbUs1EWWA79NxZeWgpO1dPNi3m5iUS yjP8/nSLLcmGY/OJjDdIj0dBl1qOjQPlg+oydnU8= Sender: toke@toke.dk Received: by alrua-kau.kau.toke.dk (Postfix, from userid 1000) id 94C38C400B2; Wed, 25 May 2016 18:33:23 +0200 (CEST) From: =?utf-8?Q?Toke_H=C3=B8iland-J=C3=B8rgensen?= To: bloat@lists.bufferbloat.net Date: Wed, 25 May 2016 18:33:23 +0200 X-Clacks-Overhead: GNU Terry Pratchett Message-ID: <8737p6f67g.fsf@toke.dk> MIME-Version: 1.0 Content-Type: text/plain Subject: [Bloat] M-Lab hit by performance degradation caused by TCP micro-bursts X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 May 2016 16:33:27 -0000 Seems their switches were overwhelmed by simultaneous line-rate micro-bursts from several servers connected to it. There's a nice report on the issue and their mitigation here: http://www.measurementlab.net/blog/traffic-microbursts-and-their-effect-on-internet-measurement/ -Toke