From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Wu Subject: Fwd: Questions about ceph OSD Date: Wed, 3 Nov 2010 10:18:18 +0800 Message-ID: <1288750698.2317.18.camel@osd1> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="=-VOL23pZhIldW7OpK3Vfb" Return-path: Received: from [210.22.136.227] ([210.22.136.227]:62982 "EHLO MAIL.TNSOFT.COM.CN" rhost-flags-FAIL-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752581Ab0KCCSS (ORCPT ); Tue, 2 Nov 2010 22:18:18 -0400 Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Sage Weil , Gregory Farnum , colinm@hq.newdream.net, henry_c_chang@tcloudcomputing.com, joshd@hq.newdream.net, samuelj@hq.newdream.net Cc: "ceph-devel@vger.kernel.org" , Yonggang Liu --=-VOL23pZhIldW7OpK3Vfb Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit hi, Any ideas or suggestions about this? or , To solve this issue,i need deeply look into what parts ceph codes ,OSD ,CRUSH ,.OSD cluster expansion .. etc ? Thanks. Jeff.Wu --=-VOL23pZhIldW7OpK3Vfb Content-Disposition: inline Content-Description: =?gb2312?Q?=D7=AA=B7=A2=B5=C4=D0=C5=BC=FE?= - Questions about ceph OSD Content-Type: message/rfc822 Received: from 263xmail.com (211.150.96.39) by MAIL.tnsoft.com.cn (172.16.1.2) with Microsoft SMTP Server id 8.3.106.1; Tue, 2 Nov 2010 14:47:33 +0800 Received: from vger.kernel.org (localhost.localdomain [127.0.0.1]) by 263xmail.com (Postfix) with ESMTP id 524AA1E91FFE; Tue, 2 Nov 2010 14:49:37 +0800 (CST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753160Ab0KBGtx (ORCPT + 1 other); Tue, 2 Nov 2010 02:49:53 -0400 Received: from [210.22.136.227] ([210.22.136.227]:60632 "EHLO MAIL.TNSOFT.COM.CN" rhost-flags-FAIL-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752933Ab0KBGtw (ORCPT ); Tue, 2 Nov 2010 02:49:52 -0400 Received: from [172.16.10.63] (172.16.10.63) by MAIL.tnsoft.com.cn (172.16.1.2) with Microsoft SMTP Server id 8.3.106.1; Tue, 2 Nov 2010 14:47:14 +0800 From: Jeff Wu To: "sage@newdream.net" , "ceph-devel@vger.kernel.org" Sender: "ceph-devel-owner@vger.kernel.org" Date: Tue, 2 Nov 2010 14:49:58 +0800 Subject: Questions about ceph OSD Thread-Topic: Questions about ceph OSD Thread-Index: Act6WdP7smCcimzHTjqcSO2SWwql8Q== Message-ID: <1288680598.2366.253.camel@osd1> Accept-Language: en-US, zh-CN Content-Language: en-US X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-AuthSource: MAIL.tnsoft.com.cn X-MS-Has-Attach: X-Auto-Response-Suppress: All X-MS-Exchange-Organization-SCL: -1 X-MS-TNEF-Correlator: list-id: Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi , I have recently been working the preliminary research whether ceph can use at our cloud computing storage system in the future , ceph is a very very excellent file system.But ,Now ,i hit a very important problem for us: Normally, as ceph described , all of the data are saved at OSDs with CRUSHMAP at ceph system. but my goal is to : 1. add a ext3 disk to ceph system ,but doesn't set it as a OSD; 2. save the normal data at the OSDs of a ceph system; 3. save the special data to a local ext3 disk at a ceph system, the ext3 disk is not set as a ceph OSD,but its infos are added to MDS and MON,when Write the special data at a ceph client ,these special data are not saved to ceph server OSDs ,but saved at the local ext3 disk. like this: At ceph client: $ mount.ceph 1.2.3.4:6789:/ /ceph $ cd /ceph $ ls cloud user secret when do writing,"cloud and user" folder data are saved to ceph OSDs , but "secret" folder data are saved to a local ext3 disk . My question is: Q1- If i add a new OSD to the ceph system ,but i do a special CRUSH placement map . Could this ways solved this problem ?,If can ,How ? Q2 - If to implement this function as a patch myself, Could you give me any ideas ? or what parts of ceph codes(server/client) that i need look into ? Thanks for all help and reply . Jeff.Wu Transoft.inc ,Sr.software engineer. 　　 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html --=-VOL23pZhIldW7OpK3Vfb--