From common-dev-return-77209-apmail-hadoop-common-dev-archive=hadoop.apache.org@hadoop.apache.org Wed Dec 7 03:06:46 2011 Return-Path: X-Original-To: apmail-hadoop-common-dev-archive@www.apache.org Delivered-To: apmail-hadoop-common-dev-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 7A27B7C47 for ; Wed, 7 Dec 2011 03:06:46 +0000 (UTC) Received: (qmail 83539 invoked by uid 500); 7 Dec 2011 03:06:44 -0000 Delivered-To: apmail-hadoop-common-dev-archive@hadoop.apache.org Received: (qmail 83416 invoked by uid 500); 7 Dec 2011 03:06:41 -0000 Mailing-List: contact common-dev-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: common-dev@hadoop.apache.org Delivered-To: mailing list common-dev@hadoop.apache.org Received: (qmail 83401 invoked by uid 99); 7 Dec 2011 03:06:38 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 07 Dec 2011 03:06:38 +0000 X-ASF-Spam-Status: No, hits=2.2 required=5.0 tests=HTML_MESSAGE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of guochonghenu@126.com designates 220.181.15.50 as permitted sender) Received: from [220.181.15.50] (HELO m15-50.126.com) (220.181.15.50) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 07 Dec 2011 03:06:28 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=126.com; s=s110527; h=Received:Date:From:To:Message-ID:In-Reply-To: References:Subject:MIME-Version:Content-Type; bh=dpY4N+pa8QQE4qv UWrBIRjKOFwhki1hs40/lsNYlxzk=; b=nz3Do2dcBgCGbDqJ6iuaMi/MOZlYz2P iLj+BakONUoEPztJAV32BrEb8SMAT7JC5zkWzlVEml2mWQ6W5iUhKmtLQvbBOCS3 lD7FleiXyx5IC9FW8RB+reBHw/aUTXseNij7BZlCJbZBHSvqEnsXOBHC0LcbCFmk j37uVMLUIWGQ= Received: from guochonghenu ( [125.216.227.102] ) by ajax-webmail-wmsvr50 (Coremail) ; Wed, 7 Dec 2011 11:06:06 +0800 (CST) Date: Wed, 7 Dec 2011 11:06:06 +0800 (CST) From: =?GBK?B?ufmz5Q==?= To: common-dev@hadoop.apache.org Message-ID: <13420f2a.81d9.134167c390a.Coremail.guochonghenu@126.com> In-Reply-To: <1729736192.22844.1321055334128.JavaMail.tomcat@hel.zones.apache.org> References: <1729736192.22844.1321055334128.JavaMail.tomcat@hel.zones.apache.org> Subject: how to select the position of a block MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_92421_505134107.1323227166986" X-Originating-IP: [125.216.227.102] X-Priority: 3 X-Mailer: Coremail Webmail Server Version SP_ntes V3.5 build 111110(15680.4167.4075) Copyright (c) 2002-2011 www.mailtech.cn 126com X-CM-CTRLDATA: /cCs8GZvb3Rlcl9odG09NDg0Ojgx X-CM-TRANSID:MsqowEDZpUMf2N5Ox1ULAA--.465W X-CM-SenderInfo: pjxruxxrqjxvlqx6ij2wof0z/1tbiZwIPGU3AKL8AcQACsa X-Coremail-Antispam: 1U5529EdanIXcx71UUUUU7vcSsGvfC2KfnxnUU== ------=_Part_92421_505134107.1323227166986 Content-Type: text/plain; charset=GBK Content-Transfer-Encoding: 7bit Hadoop:The Definitive Guide said that when the client is out of the cluster, hadoop will select the storage position of a block randomly,but it will not select the datanode which is too busy or too full. so i want to kown that how hadoop judge or measure a datanode is full or not? ------=_Part_92421_505134107.1323227166986--