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 C3D1710EC9 for ; Tue, 28 Jan 2014 10:58:07 +0000 (UTC) Received: (qmail 52624 invoked by uid 500); 28 Jan 2014 10:58:00 -0000 Delivered-To: apmail-hadoop-hdfs-user-archive@hadoop.apache.org Received: (qmail 51694 invoked by uid 500); 28 Jan 2014 10:57:58 -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 Delivered-To: moderator for user@hadoop.apache.org Received: (qmail 36361 invoked by uid 99); 28 Jan 2014 10:44:35 -0000 X-ASF-Spam-Status: No, hits=2.2 required=5.0 tests=HTML_MESSAGE,RCVD_IN_DNSWL_NONE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of c.agrawal@outlook.com designates 65.54.190.80 as permitted sender) X-TMN: [JJO6urjji1HcIXGkVMCb1wnU9TX/yXxv] X-Originating-Email: [c.agrawal@outlook.com] Message-ID: Content-Type: multipart/alternative; boundary="_278a5823-301b-4b3a-91fe-f8966dc1b5ea_" From: Chetan Agrawal Sender: To: "user@hadoop.apache.org" Subject: memory management module of Namenode Date: Tue, 28 Jan 2014 16:14:08 +0530 Importance: Normal MIME-Version: 1.0 X-OriginalArrivalTime: 28 Jan 2014 10:44:08.0829 (UTC) FILETIME=[DF994AD0:01CF1C15] X-Virus-Checked: Checked by ClamAV on apache.org --_278a5823-301b-4b3a-91fe-f8966dc1b5ea_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I read that the namenode keeps all the metadata record in main memory right= for fast access. I want to study the code where the namenode is instructed to do so i.e. to = keep metadata record in main memory. where can i find the source code file = for this namenode memory management? i am using github and have 'hadoop-com= mon' repository. = --_278a5823-301b-4b3a-91fe-f8966dc1b5ea_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I read that the namenode keeps a= ll the metadata record in main memory right for fast access.
I want to s= tudy the code where the namenode is instructed to do so i.e. to keep metada= ta record in main memory. where can i find the source code file for this= namenode memory management? i am using github and have 'hadoop-common'= repository.
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