From mboxrd@z Thu Jan 1 00:00:00 1970 From: wangsongbo Subject: when an osd is started up, IO will be blocked Date: Thu, 22 Oct 2015 22:43:42 +0800 Message-ID: <5628F61E.1060708@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-pa0-f42.google.com ([209.85.220.42]:34915 "EHLO mail-pa0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753233AbbJVOnu (ORCPT ); Thu, 22 Oct 2015 10:43:50 -0400 Received: by pasz6 with SMTP id z6so88526774pas.2 for ; Thu, 22 Oct 2015 07:43:50 -0700 (PDT) Sender: ceph-devel-owner@vger.kernel.org List-ID: To: ceph-devel , ceph-users@ceph.com Hi all, When an osd is started, relative IO will be blocked. According to the test result,the larger iops the clients send , the longer it will take to elapse. Adjustment on all the parameters associate with recovery operations was also found useless. How to reduce the impact of this process on the IO ? Thanks and Regards, WangSongbo