Return-Path: X-Original-To: apmail-hadoop-user-archive@minotaur.apache.org Delivered-To: apmail-hadoop-user-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 07CAE116DB for ; Tue, 13 May 2014 07:51:17 +0000 (UTC) Received: (qmail 56001 invoked by uid 500); 13 May 2014 06:01:56 -0000 Delivered-To: apmail-hadoop-user-archive@hadoop.apache.org Received: (qmail 55882 invoked by uid 500); 13 May 2014 06:01:56 -0000 Mailing-List: contact user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@hadoop.apache.org Delivered-To: mailing list user@hadoop.apache.org Received: (qmail 55875 invoked by uid 99); 13 May 2014 06:01:56 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 13 May 2014 06:01:56 +0000 X-ASF-Spam-Status: No, hits=-0.0 required=5.0 tests=RCVD_IN_DNSWL_NONE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: local policy includes SPF record at spf.trusted-forwarder.org) Received: from [98.139.212.154] (HELO nm3-vm0.bullet.mail.bf1.yahoo.com) (98.139.212.154) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 13 May 2014 06:01:51 +0000 Received: from [66.196.81.170] by nm3.bullet.mail.bf1.yahoo.com with NNFMP; 13 May 2014 06:01:30 -0000 Received: from [98.139.211.198] by tm16.bullet.mail.bf1.yahoo.com with NNFMP; 13 May 2014 06:01:30 -0000 Received: from [127.0.0.1] by smtp207.mail.bf1.yahoo.com with NNFMP; 13 May 2014 06:01:30 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ymail.com; s=s1024; t=1399960890; bh=i07WVpkFxPbIl9opC9Xt10gl15QQPpRVSdjs/2G+Er8=; h=X-Yahoo-Newman-Id:X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:X-Rocket-Received:Message-ID:Date:From:User-Agent:MIME-Version:To:Subject:References:In-Reply-To:X-Enigmail-Version:Content-Type:Content-Transfer-Encoding; b=yYD2vmBV3a3GCStgXcWwM8eVhYTNJ3zqdDtfiPmOzVVNVY6oHI+FHJGAyIR2hUNjRm/xxygtlcMAL1gyOluAspDfUKp7BRssjw5uVhKhNEhSUeP4BVxAzcDSS9UHaWhU1ndPoisLcmdtTgr3dlJTYuFFSyGtm3mP7YaapNsxUE4= X-Yahoo-Newman-Id: 450875.97178.bm@smtp207.mail.bf1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: eedkgIoVM1mvk4c5IrUZC0h1O2C9FYbu.8er8W9zPPf9_nP q6kU7RQhEjAnsrZS9tkssZgq.P.rNJUlR3DKd4K83gDDYDef.Zs3LjQrIxzM Qhve9HJAkCQtSADiVlwkNsGwD5795QSYxsoIS28Y_Tlh4GI7HcXteWvj.K3J 50URvT4EKWJ5CGdrOcebjRG6u6eyVajVk5eOtDAl_8Kr8HW.qe3Bbt3jrvOo 0JE0fC0887HpywVJZ4IzRTjPEbEZv4Kc_AFnUY.aXRHz.cMyVCOBxP90_Ib4 d90BSVZSQtstrCH8W4TRMrLkJuWO_PbT1viapluQWfQtvEboSulcije5kMoz Ob7zpSLuJMWJ96d1XAYfXjqHGD7pxZdO41NYk9S6k8E2baed.j6npLwSSCjI hBGHorbfRY7C1Vc.OuvXbsf4F3MwLEa7AmokHdomMIpglTZeVC7cIgR8z_DV JR9MGEP7POdtFavyLl16bK1RJcvbT2OsQoNnhv3VdrMGJlMP5Pi3g1bmgZbf SwLItwKflFslDhrlkUOhk3f7DFBuITo8Ov1tRF9l8JBzFAcu64HovQEheQiQ CqZ6ck4xyTWIcFy1wfgjLKxczHqeei0i_o6RMH56XycftQw-- X-Yahoo-SMTP: ywuUw36swBDUklBpSjn8yMw0T_VxRmK61Zy9fACb X-Rocket-Received: from [192.168.1.65] (ravihoo@173.228.125.208 with plain [63.250.193.228]) by smtp207.mail.bf1.yahoo.com with SMTP; 12 May 2014 23:01:30 -0700 PDT Message-ID: <5371B539.5060702@ymail.com> Date: Mon, 12 May 2014 23:01:29 -0700 From: Ravi Prakash User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 MIME-Version: 1.0 To: user@hadoop.apache.org Subject: Re: LVM to JBOD conversion without data loss References: In-Reply-To: X-Enigmail-Version: 1.6 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Virus-Checked: Checked by ClamAV on apache.org -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 One way I can think of is decomissioning the nodes and then basically re-imaging it however you want to. Is that not an option? On 05/12/14 00:18, Bharath Kumar wrote: > Hi I am a query regarding JBOD , > > I sit possible to migrate from LVM to JBOD without loosing data ? Is there > any reference documentation ? > > The steps which i can think of is > > 1) reduce the replication > > 2) change the hdfs-site.xml in namenode > > 3) add the data node back with new JBOD directory structure for haddop > > 4) rebalance the cluster > > repeat 1 -4 for all data nodes is the steps correct ? > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBAgAGBQJTcbU5AAoJEGunL/HJl4XecH0P/0FIpstANjdkzpxKD2of1TRd LZKbyWUAbj3EZB06yDMunNCsj9Bg5BwsuRV3LFVUmwRv1ymW/hXQMgn8torPiu45 csmYX2ihMNlMqQO7u3HyaDHpHnTkBTmtypfWWXVe2LNjnrpmkcJpl8dU2FuEm7ga E8w46pnvB/vSGFQQ3tWOCdCknKM+0ykcrcy64Xpe0gx92MSgyEL5I2yxrOA3sSru QvU4ko4q8Q5OT6oOFBw5lNiVJ6FyiQj0y5499o9zV5xUFL39a+R/nqZpiJ0Pgm2d ytZVheHLYZZSt2gZYjAGvikLveez/ycCJEx4YA2j5FlpMycpeshLmJ1K/EAbIY/a Yv2hsf2GQB6pVZisOfL179TwTcII8xJ3/JviyrdRb93anVT9sgicgJJrFtQN+mcy exrT4R5Y/Fl1pxkFUHJj4qz9rSuwC2WlUjpjGpA8Lf9DsIC5ONzzDTSux+e4WfCD wBjSd2fZ8F6/KPoHMvfMUVwMoT7RLtUuWpw87P5GshdzjD0Bx0HhEMK5+XGn/GyP VU2ahcFrjFok5FoaysbY8QjKqn7gMT2b1hG7jM8bm/4MPLOYWfYKpRghClQFGbD1 Xb7p5pshqlctZw1X+ZfxyB2khrSsvd3GCI1PwK62mdehL59klpVkNQs+FXILQ6sF 1lodqxtUgXcRE0hXwhV7 =CR33 -----END PGP SIGNATURE-----