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 A1F2A200C41 for ; Fri, 24 Mar 2017 22:30:48 +0100 (CET) Received: by cust-asf.ponee.io (Postfix) id A08B2160B75; Fri, 24 Mar 2017 21:30:48 +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 E006D160B93 for ; Fri, 24 Mar 2017 22:30:47 +0100 (CET) Received: (qmail 90863 invoked by uid 500); 24 Mar 2017 21:30:47 -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 90851 invoked by uid 99); 24 Mar 2017 21:30:46 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd3-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 24 Mar 2017 21:30:46 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd3-us-west.apache.org (ASF Mail Server at spamd3-us-west.apache.org) with ESMTP id 9A61A18002C for ; Fri, 24 Mar 2017 21:30:46 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd3-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -99.202 X-Spam-Level: X-Spam-Status: No, score=-99.202 tagged_above=-999 required=6.31 tests=[KAM_ASCII_DIVIDERS=0.8, RP_MATCHES_RCVD=-0.001, SPF_PASS=-0.001, USER_IN_WHITELIST=-100] autolearn=disabled Received: from mx1-lw-eu.apache.org ([10.40.0.8]) by localhost (spamd3-us-west.apache.org [10.40.0.10]) (amavisd-new, port 10024) with ESMTP id F-3PObaPO0-8 for ; Fri, 24 Mar 2017 21:30:46 +0000 (UTC) Received: from mailrelay1-us-west.apache.org (mailrelay1-us-west.apache.org [209.188.14.139]) by mx1-lw-eu.apache.org (ASF Mail Server at mx1-lw-eu.apache.org) with ESMTP id 678CA5FB72 for ; Fri, 24 Mar 2017 21:30:45 +0000 (UTC) Received: from jira-lw-us.apache.org (unknown [207.244.88.139]) by mailrelay1-us-west.apache.org (ASF Mail Server at mailrelay1-us-west.apache.org) with ESMTP id EC191E0A2B for ; Fri, 24 Mar 2017 21:30:41 +0000 (UTC) Received: from jira-lw-us.apache.org (localhost [127.0.0.1]) by jira-lw-us.apache.org (ASF Mail Server at jira-lw-us.apache.org) with ESMTP id 9C99824067 for ; Fri, 24 Mar 2017 21:30:41 +0000 (UTC) Date: Fri, 24 Mar 2017 21:30:41 +0000 (UTC) From: "Chen Liang (JIRA)" To: hdfs-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HDFS-11577) Combine the old and the new chooseRandom for better performance MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 archived-at: Fri, 24 Mar 2017 21:30:48 -0000 [ https://issues.apache.org/jira/browse/HDFS-11577?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Chen Liang updated HDFS-11577: ------------------------------ Status: Patch Available (was: In Progress) > Combine the old and the new chooseRandom for better performance > --------------------------------------------------------------- > > Key: HDFS-11577 > URL: https://issues.apache.org/jira/browse/HDFS-11577 > Project: Hadoop HDFS > Issue Type: Sub-task > Components: namenode > Reporter: Chen Liang > Assignee: Chen Liang > Attachments: HDFS-11577.001.patch > > > As discussed in HDFS-11535, this JIRA adds a new function combining both the new and the old chooseRandom methods for better performance. > More specifically, when choosing a random node with storage type requirement, the combined method first tries the old method of blindly picking a random node. If this node satisfies, it is returned. Otherwise, the new chooseRandom is called, which guarantees to find a eligible node in one call (if there is one at all). -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscribe@hadoop.apache.org For additional commands, e-mail: hdfs-issues-help@hadoop.apache.org