Return-Path: X-Original-To: archive-asf-public-internal@cust-asf2.ponee.io Delivered-To: archive-asf-public-internal@cust-asf2.ponee.io Received: from cust-asf.ponee.io (cust-asf.ponee.io [163.172.22.183]) by cust-asf2.ponee.io (Postfix) with ESMTP id 70B91200B58 for ; Wed, 13 Jul 2016 01:02:23 +0200 (CEST) Received: by cust-asf.ponee.io (Postfix) id 6F7A3160A79; Tue, 12 Jul 2016 23:02:23 +0000 (UTC) Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by cust-asf.ponee.io (Postfix) with SMTP id DC9BC160A56 for ; Wed, 13 Jul 2016 01:02:22 +0200 (CEST) Received: (qmail 76552 invoked by uid 500); 12 Jul 2016 23:02:21 -0000 Mailing-List: contact hdfs-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Delivered-To: mailing list hdfs-issues@hadoop.apache.org Received: (qmail 76378 invoked by uid 99); 12 Jul 2016 23:02:21 -0000 Received: from arcas.apache.org (HELO arcas) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 12 Jul 2016 23:02:21 +0000 Received: from arcas.apache.org (localhost [127.0.0.1]) by arcas (Postfix) with ESMTP id 8299F2C02A4 for ; Tue, 12 Jul 2016 23:02:21 +0000 (UTC) Date: Tue, 12 Jul 2016 23:02:21 +0000 (UTC) From: "Mingliang Liu (JIRA)" To: hdfs-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HDFS-10326) Disable setting tcp socket send/receive buffers for write pipelines MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 archived-at: Tue, 12 Jul 2016 23:02:23 -0000 [ https://issues.apache.org/jira/browse/HDFS-10326?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Mingliang Liu updated HDFS-10326: --------------------------------- Assignee: Daryn Sharp (was: Mingliang Liu) > Disable setting tcp socket send/receive buffers for write pipelines > ------------------------------------------------------------------- > > Key: HDFS-10326 > URL: https://issues.apache.org/jira/browse/HDFS-10326 > Project: Hadoop HDFS > Issue Type: Bug > Components: datanode, hdfs > Affects Versions: 2.6.0 > Reporter: Daryn Sharp > Assignee: Daryn Sharp > Attachments: HDFS-10326.000.patch > > > The DataStreamer and the Datanode use a hardcoded DEFAULT_DATA_SOCKET_SIZE=128K for the send and receive buffers of a write pipeline. Explicitly setting tcp buffer sizes disables tcp stack auto-tuning. > The hardcoded value will saturate a 1Gb with 1ms RTT. 105Mbs at 10ms. Paltry 11Mbs over a 100ms long haul. 10Gb networks are underutilized. > There should either be a configuration to completely disable setting the buffers, or the the setReceiveBuffer and setSendBuffer should be removed entirely. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscribe@hadoop.apache.org For additional commands, e-mail: hdfs-issues-help@hadoop.apache.org