From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Nelson Subject: Re: Weekly performance meeting Date: Thu, 25 Sep 2014 14:31:44 -0500 Message-ID: <54246DA0.5050801@redhat.com> References: <20140925192728.GA22139@oder.mch.fsc.net> <54246D6A.5060101@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-qa0-f48.google.com ([209.85.216.48]:59171 "EHLO mail-qa0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750866AbaIYTbq (ORCPT ); Thu, 25 Sep 2014 15:31:46 -0400 Received: by mail-qa0-f48.google.com with SMTP id k15so5007226qaq.21 for ; Thu, 25 Sep 2014 12:31:45 -0700 (PDT) In-Reply-To: <54246D6A.5060101@redhat.com> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Kasper Dieter , Sage Weil Cc: "ceph-devel@vger.kernel.org" , "Somnath.Roy@sandisk.com" , Andreas Bluemle , "Allen.Samuels@sandisk.com" , "PVonStamwitz@us.fujitsu.com" , "xinxin.shu@intel.com" , "haomaiwang@gmail.com" , "s.priebe@profihost.ag" , "xiaoxi.chen@intel.com" , "milosz@adfin.com" , "zhiqiang.wang@intel.com" , "jianpeng.ma@intel.com" , "gdror@mellanox.com" , "vuhuong@mellanox.com" , "mark.nelson@inktank.com" Oops, replied to fast and meant to put Dieter! :) Mark On 09/25/2014 02:30 PM, Mark Nelson wrote: > I'll be there too, and 100% agree with you Kasper! :) > > Mark > > On 09/25/2014 02:27 PM, Kasper Dieter wrote: >> Hi Sage, >> >> I'm definitely interested in joining this weekly call starting Oct 1st. >> Thanks for this initiative! >> >> Especially I'm interested in: >> - how can we reduce the number of threads in the system >> -- including to avoid the context switches in between >> -- including to avoid the queues and locks in between >> - how we can reduce the number of lines of code >> -- including the multiple system calls for each IO >> - how we can introduce a high efficient timestamp collection of the >> most important FN check-points >> (see for example the attached file) >> to measure the change and effect of our actions >> >> Best Regards, >> -Dieter >> >> >> On Thu, Sep 25, 2014 at 08:27:00PM +0200, Sage Weil wrote: >>> Hi everyone, >>> >>> A number of people have approached me about how to get more involved >>> with >>> the current work on improving performance and how to better coordinate >>> with other interested parties. A few meetings have taken place offline >>> with good results but only a few interested parties were involved. >>> >>> Ideally, we'd like to move as much of this dicussion into the public >>> forums: ceph-devel@vger.kernel.org and #ceph-devel. That isn't always >>> sufficient, however. I'd like to also set up a regular weekly meeting >>> using google hangouts or bluejeans so that all interested parties can >>> share progress. There are a lot of things we can do during the Hammer >>> cycle to improve things but it will require some coordination of effort. >>> >>> Among other things, we can discuss: >>> >>> - observed performance limitations >>> - high level strategies for addressing them >>> - proposed patch sets and their performance impact >>> - anything else that will move us forward >>> >>> One challenge is timezones: there are developers in the US, China, >>> Europe, >>> and Israel who may want to join. As a starting point, how about next >>> Wednesday, 15:00 UTC? If I didn't do my tz math wrong, that's >>> >>> 8:00 (PDT, California) >>> 15:00 (UTC) >>> 18:00 (IDT, Israel) >>> 23:00 (CST, China) >>> >>> That is surely not the ideal time for everyone but it can hopefully be a >>> starting point. >>> >>> I've also created an etherpad for collecting discussion/agenda items at >>> >>> http://pad.ceph.com/p/performance_weekly >>> >>> Is there interest here? Please let everyone know if you are actively >>> working in this area and/or would like to join, and update the pad above >>> with the topics you would like to discuss. >>> >>> Thanks! >>> sage >