From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jens Axboe Subject: Re: awful request merge results while simulating high IOPS multipath Date: Wed, 25 Feb 2015 07:11:41 -0800 Message-ID: <54EDE62D.7010308@kernel.dk> References: <1424796250-38553-1-git-send-email-snitzer@redhat.com> <1424796250-38553-5-git-send-email-snitzer@redhat.com> <54ECAC08.7040603@kernel.dk> <20150224172259.GA39226@redhat.com> <54ECBA78.6020204@kernel.dk> <20150224181257.GA11444@redhat.com> <54ECC000.40604@kernel.dk> <20150224183256.GA11566@redhat.com> <20150225005608.GA13348@redhat.com> Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: Keith Busch , Mike Snitzer Cc: jmoyer@redhat.com, shivakrishna.merla@netapp.com, dm-devel@redhat.com, Bart Van Assche List-Id: dm-devel.ids On 02/24/2015 08:14 PM, Keith Busch wrote: > To be honest, we also see underwhelming performance on high IOPS PCIe > SSDs. We know of some bottlenecks and ideas to test, but hoping to work > out the kinks in those ideas before Vault in two weeks. Related to merging, or? -- Jens Axboe