From common-issues-return-29985-apmail-hadoop-common-issues-archive=hadoop.apache.org@hadoop.apache.org Wed Apr 18 20:35:32 2012 Return-Path: X-Original-To: apmail-hadoop-common-issues-archive@minotaur.apache.org Delivered-To: apmail-hadoop-common-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 A1B22951F for ; Wed, 18 Apr 2012 20:35:32 +0000 (UTC) Received: (qmail 4243 invoked by uid 500); 18 Apr 2012 20:35:32 -0000 Delivered-To: apmail-hadoop-common-issues-archive@hadoop.apache.org Received: (qmail 4062 invoked by uid 500); 18 Apr 2012 20:35:32 -0000 Mailing-List: contact common-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: common-issues@hadoop.apache.org Delivered-To: mailing list common-issues@hadoop.apache.org Received: (qmail 4051 invoked by uid 99); 18 Apr 2012 20:35:32 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 18 Apr 2012 20:35:32 +0000 X-ASF-Spam-Status: No, hits=-2000.0 required=5.0 tests=ALL_TRUSTED,T_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; Wed, 18 Apr 2012 20:35:26 +0000 Received: from hel.zones.apache.org (hel.zones.apache.org [140.211.11.116]) by hel.zones.apache.org (Postfix) with ESMTP id C06D23A22A7 for ; Wed, 18 Apr 2012 20:34:41 +0000 (UTC) Date: Wed, 18 Apr 2012 20:34:41 +0000 (UTC) From: "Robert Joseph Evans (Updated) (JIRA)" To: common-issues@hadoop.apache.org Message-ID: <663871015.3017.1334781281789.JavaMail.tomcat@hel.zones.apache.org> In-Reply-To: <1961396596.35213.1329192779746.JavaMail.tomcat@hel.zones.apache.org> Subject: [jira] [Updated] (HADOOP-8069) Enable TCP_NODELAY by default for IPC MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/HADOOP-8069?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Robert Joseph Evans updated HADOOP-8069: ---------------------------------------- Target Version/s: 2.0.0, 3.0.0 (was: 0.23.2) > Enable TCP_NODELAY by default for IPC > ------------------------------------- > > Key: HADOOP-8069 > URL: https://issues.apache.org/jira/browse/HADOOP-8069 > Project: Hadoop Common > Issue Type: Improvement > Components: ipc > Affects Versions: 0.23.0 > Reporter: Todd Lipcon > Assignee: Todd Lipcon > Attachments: hadoop-8069.txt > > > I think we should switch the default for the IPC client and server NODELAY options to true. As wikipedia says: > {quote} > In general, since Nagle's algorithm is only a defense against careless applications, it will not benefit a carefully written application that takes proper care of buffering; the algorithm has either no effect, or negative effect on the application. > {quote} > Since our IPC layer is well contained and does its own buffering, we shouldn't be careless. -- 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