From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56640) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1V2KRI-0000hr-RJ for qemu-devel@nongnu.org; Thu, 25 Jul 2013 08:14:37 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1V2KRH-0003JA-LU for qemu-devel@nongnu.org; Thu, 25 Jul 2013 08:14:36 -0400 Received: from nodalink.pck.nerim.net ([62.212.105.220]:48687 helo=paradis.irqsave.net) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1V2KRH-0003J4-D6 for qemu-devel@nongnu.org; Thu, 25 Jul 2013 08:14:35 -0400 Date: Thu, 25 Jul 2013 14:16:22 +0200 From: =?iso-8859-1?Q?Beno=EEt?= Canet Message-ID: <20130725121622.GA5151@irqsave.net> References: <1374596968-20181-1-git-send-email-benoit@irqsave.net> <20130725120822.GA14010@T430s.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <20130725120822.GA14010@T430s.redhat.com> Content-Transfer-Encoding: quoted-printable Subject: Re: [Qemu-devel] [PATCH V3 for-1.6 0/5] Leaky bucket throttling and features List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Fam Zheng Cc: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com Le Thursday 25 Jul 2013 =E0 20:08:22 (+0800), Fam Zheng a =E9crit : > My ignorant question: Besides the fix, how is io throttling improved > from previously, what are the advantages of leaky bucket algorithm? The advantage is simplicity and the ability to allow controlled bursts. The disavantage is it add stutters to the iops flow. Best Regards Beno=EEt