From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Friesen Subject: Removing an OSD? Date: Sun, 13 Feb 2011 09:57:22 -0800 Message-ID: <4D581B82.4090507@nadir-seen-fire.com> Reply-To: daniel@nadir-seen-fire.com Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-pz0-f46.google.com ([209.85.210.46]:33872 "EHLO mail-pz0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754744Ab1BMR5I (ORCPT ); Sun, 13 Feb 2011 12:57:08 -0500 Received: by pzk35 with SMTP id 35so717328pzk.19 for ; Sun, 13 Feb 2011 09:57:08 -0800 (PST) Sender: ceph-devel-owner@vger.kernel.org List-ID: To: ceph-devel@vger.kernel.org I read through most of the documentation on the wiki, though there is one thing I couldn't find. The OSD cluster expansion/contraction page lists information on adding a node, but nothing about removing one. In particular there are two things I'm curious about. Firstly, when you want to remove a node (decommissioning the hardware, etc...) how do you mark it so that ceph will start migrating data away from it onto other OSDs? Secondly, how does removing an osd interact with the sequential ids of OSDs? The importance of that, including not skipping numbers was underlined strongly on another page. -- ~Daniel Friesen (Dantman, Nadir-Seen-Fire) [http://daniel.friesen.name]