Return-Path: X-Original-To: apmail-hadoop-hdfs-issues-archive@minotaur.apache.org Delivered-To: apmail-hadoop-hdfs-issues-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 2103E7B16 for ; Sat, 5 Nov 2011 17:57:15 +0000 (UTC) Received: (qmail 76182 invoked by uid 500); 5 Nov 2011 17:57:15 -0000 Delivered-To: apmail-hadoop-hdfs-issues-archive@hadoop.apache.org Received: (qmail 76142 invoked by uid 500); 5 Nov 2011 17:57:14 -0000 Mailing-List: contact hdfs-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: hdfs-issues@hadoop.apache.org Delivered-To: mailing list hdfs-issues@hadoop.apache.org Received: (qmail 76134 invoked by uid 99); 5 Nov 2011 17:57:14 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Sat, 05 Nov 2011 17:57:14 +0000 X-ASF-Spam-Status: No, hits=-2001.2 required=5.0 tests=ALL_TRUSTED,RP_MATCHES_RCVD X-Spam-Check-By: apache.org Received: from [140.211.11.116] (HELO hel.zones.apache.org) (140.211.11.116) by apache.org (qpsmtpd/0.29) with ESMTP; Sat, 05 Nov 2011 17:57:12 +0000 Received: from hel.zones.apache.org (hel.zones.apache.org [140.211.11.116]) by hel.zones.apache.org (Postfix) with ESMTP id A90AC36848 for ; Sat, 5 Nov 2011 17:56:51 +0000 (UTC) Date: Sat, 5 Nov 2011 17:56:51 +0000 (UTC) From: "dhruba borthakur (Commented) (JIRA)" To: hdfs-issues@hadoop.apache.org Message-ID: <971850817.3261.1320515811721.JavaMail.tomcat@hel.zones.apache.org> In-Reply-To: <191507641.28687.1313084188083.JavaMail.tomcat@hel.zones.apache.org> Subject: [jira] [Commented] (HDFS-2246) Shortcut a local client reads to a Datanodes files directly MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 X-Virus-Checked: Checked by ClamAV on apache.org [ https://issues.apache.org/jira/browse/HDFS-2246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13144766#comment-13144766 ] dhruba borthakur commented on HDFS-2246: ---------------------------------------- > synchronized LinkedHashMap Why not a concurrent hash map? we have around 30K blocks per datanode and with SATA disks becoming 4TB or larger next year, we might have close to 100K blocks per datanode perhaps. > Shortcut a local client reads to a Datanodes files directly > ----------------------------------------------------------- > > Key: HDFS-2246 > URL: https://issues.apache.org/jira/browse/HDFS-2246 > Project: Hadoop HDFS > Issue Type: Improvement > Reporter: Sanjay Radia > Attachments: 0001-HDFS-347.-Local-reads.patch, HDFS-2246-branch-0.20-security-205.patch, HDFS-2246-branch-0.20-security-205.patch, HDFS-2246-branch-0.20-security.patch, HDFS-2246.20s.1.patch, HDFS-2246.20s.2.txt, HDFS-2246.20s.3.txt, HDFS-2246.20s.4.txt, HDFS-2246.20s.patch, localReadShortcut20-security.2patch > > -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira