From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Nelson Subject: Re: Weekly performance meeting Date: Thu, 25 Sep 2014 14:30:50 -0500 Message-ID: <54246D6A.5060101@redhat.com> References: <20140925192728.GA22139@oder.mch.fsc.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-qg0-f46.google.com ([209.85.192.46]:46080 "EHLO mail-qg0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752483AbaIYTav (ORCPT ); Thu, 25 Sep 2014 15:30:51 -0400 Received: by mail-qg0-f46.google.com with SMTP id q108so8037018qgd.5 for ; Thu, 25 Sep 2014 12:30:51 -0700 (PDT) In-Reply-To: <20140925192728.GA22139@oder.mch.fsc.net> 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" 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