Return-Path: X-Original-To: apmail-hadoop-hdfs-user-archive@minotaur.apache.org Delivered-To: apmail-hadoop-hdfs-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 63C58D96F for ; Thu, 15 Nov 2012 04:34:37 +0000 (UTC) Received: (qmail 59261 invoked by uid 500); 15 Nov 2012 04:34:32 -0000 Delivered-To: apmail-hadoop-hdfs-user-archive@hadoop.apache.org Received: (qmail 59106 invoked by uid 500); 15 Nov 2012 04:34:31 -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 59098 invoked by uid 99); 15 Nov 2012 04:34:31 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 15 Nov 2012 04:34:31 +0000 X-ASF-Spam-Status: No, hits=-0.0 required=5.0 tests=SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of maheswara@huawei.com designates 119.145.14.65 as permitted sender) Received: from [119.145.14.65] (HELO szxga02-in.huawei.com) (119.145.14.65) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 15 Nov 2012 04:34:27 +0000 Received: from 172.24.2.119 (EHLO szxeml211-edg.china.huawei.com) ([172.24.2.119]) by szxrg02-dlp.huawei.com (MOS 4.3.4-GA FastPath queued) with ESMTP id ASP13043; Thu, 15 Nov 2012 12:34:05 +0800 (CST) Received: from SZXEML423-HUB.china.huawei.com (10.82.67.162) by szxeml211-edg.china.huawei.com (172.24.2.182) with Microsoft SMTP Server (TLS) id 14.1.323.3; Thu, 15 Nov 2012 12:34:05 +0800 Received: from SZXEML531-MBX.china.huawei.com ([fe80::61a8:2cb5:62f9:d4a4]) by szxeml423-hub.china.huawei.com ([10.82.67.162]) with mapi id 14.01.0323.003; Thu, 15 Nov 2012 12:34:03 +0800 From: Uma Maheswara Rao G To: "user@hadoop.apache.org" Subject: RE: Active-Active setup for the namenode Thread-Topic: Active-Active setup for the namenode Thread-Index: AQHNwmSmBrHD8OxGrE6nf87cdEoF/5fprOIAgACeihY= Date: Thu, 15 Nov 2012 04:34:01 +0000 Message-ID: <1542FA4EE20C5048A5C2A3663BED2A6B30B12DF0@szxeml531-mbx.china.huawei.com> References: , In-Reply-To: Accept-Language: en-US, zh-CN Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.18.96.97] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-CFilter-Loop: Reflected X-Virus-Checked: Checked by ClamAV on apache.org Adding to Andy's points: To be clarify: I think 0.23 does not claim HA feature. Also Hadoop-2 HA is Active-Standby model. Regards, Uma ________________________________________ From: Andy Isaacson [adi@cloudera.com] Sent: Thursday, November 15, 2012 8:19 AM To: user@hadoop.apache.org Subject: Re: Active-Active setup for the namenode On Wed, Nov 14, 2012 at 4:35 AM, mailinglist wrote: > does anyone know, if it possible to setup an active-active-NameNode in ha= doop 1.0 ? Or how can i provide a HA-NameNode? HA is not present in hadoop 1.0. You'll have to upgrade to a release on branch 2.0 or 0.23. -andy=