Return-Path: 
 <user-return-10086-apmail-hadoop-hdfs-user-archive=hadoop.apache.org@hadoop.apache.org>
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 F2B501090A
	for <apmail-hadoop-hdfs-user-archive@minotaur.apache.org>;
 Fri, 16 Aug 2013 02:46:35 +0000 (UTC)
Received: (qmail 84032 invoked by uid 500); 16 Aug 2013 02:46:30 -0000
Delivered-To: apmail-hadoop-hdfs-user-archive@hadoop.apache.org
Received: (qmail 83697 invoked by uid 500); 16 Aug 2013 02:46:30 -0000
Mailing-List: contact user-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
List-Help: <mailto:user-help@hadoop.apache.org>
List-Unsubscribe: <mailto:user-unsubscribe@hadoop.apache.org>
List-Post: <mailto:user@hadoop.apache.org>
List-Id: <user.hadoop.apache.org>
Reply-To: user@hadoop.apache.org
Delivered-To: mailing list user@hadoop.apache.org
Received: (qmail 83688 invoked by uid 99); 16 Aug 2013 02:46:29 -0000
Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136)
    by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 16 Aug 2013 02:46:29 +0000
X-ASF-Spam-Status: No, hits=1.5 required=5.0
	tests=HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_PASS
X-Spam-Check-By: apache.org
Received-SPF: pass (athena.apache.org: domain of justlooks@gmail.com
 designates 209.85.214.171 as permitted sender)
Received: from [209.85.214.171] (HELO mail-ob0-f171.google.com)
 (209.85.214.171)
    by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 16 Aug 2013 02:46:24 +0000
Received: by mail-ob0-f171.google.com with SMTP id tb18so1589272obb.16
        for <user@hadoop.apache.org>; Thu, 15 Aug 2013 19:46:03 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=20120113;
        h=mime-version:date:message-id:subject:from:to:content-type;
        bh=WkwDfSJW9OHmEJmb6YIkbbeIwVIfF91kNCGY9QPq82M=;
        b=MLrWeyBdz+ac/lusS3UAKMAhqvuNx8CKNmfNznfW10QqpndWQ/0sOvl5LnMPw6NPDM
         egaRcqx2qcF0MmBe0yPmZHMyDMYKtYXjYsWIwmZSLAjeROIwQwXl6I4FRnNmez+9RF8g
         3LmQlsvMN/G9Ozg3uTsHmzWw3lvTKmTMrh94+pcEWY9jJCt05PkX6tP/99HJeH6DE3pw
         6FP1E0+p1m+JapIig4Or5hXrFBLXPb9SjAkSxVvWWUgVzUY2Zv5gbcvEG9Ua62cFiReE
         Ug9f41qieH4hACrxch/hrrY+RCWlE0PPuCRrTx7Wj3AymqJWM5z61hiVWto5zHCKn806
         83Tw==
MIME-Version: 1.0
X-Received: by 10.182.246.232 with SMTP id xz8mr28672590obc.9.1376621163877;
 Thu, 15 Aug 2013 19:46:03 -0700 (PDT)
Received: by 10.182.129.138 with HTTP; Thu, 15 Aug 2013 19:46:03 -0700 (PDT)
Date: Fri, 16 Aug 2013 10:46:03 +0800
Message-ID: 
 <CACeqxwRcKm7OX2jLhZhoK-+rBfUeJ0ATV6wbpZNk48KXcrTVmg@mail.gmail.com>
Subject: question about hadoop HA
From: ch huang <justlooks@gmail.com>
To: user@hadoop.apache.org
Content-Type: multipart/alternative; boundary=001a11c1c39e769ea504e407976e
X-Virus-Checked: Checked by ClamAV on apache.org

--001a11c1c39e769ea504e407976e
Content-Type: text/plain; charset=ISO-8859-1

hi,all
i have a question that i can not answer by myself,hope any one can help.
if i do not set up HA,client can query DNS get the hdfs entrance,but if i
set up namenode HA,how client know which host it should talk?

--001a11c1c39e769ea504e407976e
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

<div>hi,all</div>
<div>i have a question that i can not answer by myself,hope any one can hel=
p.</div>
<div>if i do not set up HA,client can query DNS get the hdfs entrance,but i=
f i set up namenode HA,how client know which host it should talk?</div>
<div>=A0</div>
<div>=A0</div>

--001a11c1c39e769ea504e407976e--