From common-issues-return-149498-archive-asf-public=cust-asf.ponee.io@hadoop.apache.org Thu Mar 8 03:48:06 2018 Return-Path: X-Original-To: archive-asf-public@cust-asf.ponee.io Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by mx-eu-01.ponee.io (Postfix) with SMTP id 0A569180656 for ; Thu, 8 Mar 2018 03:48:05 +0100 (CET) Received: (qmail 76494 invoked by uid 500); 8 Mar 2018 02:48:04 -0000 Mailing-List: contact common-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Delivered-To: mailing list common-issues@hadoop.apache.org Received: (qmail 76483 invoked by uid 99); 8 Mar 2018 02:48:04 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd1-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 08 Mar 2018 02:48:04 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd1-us-west.apache.org (ASF Mail Server at spamd1-us-west.apache.org) with ESMTP id 0600EC6AF3 for ; Thu, 8 Mar 2018 02:48:04 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd1-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -109.511 X-Spam-Level: X-Spam-Status: No, score=-109.511 tagged_above=-999 required=6.31 tests=[ENV_AND_HDR_SPF_MATCH=-0.5, KAM_ASCII_DIVIDERS=0.8, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_SPF_WL=-7.5, USER_IN_WHITELIST=-100] autolearn=disabled Received: from mx1-lw-eu.apache.org ([10.40.0.8]) by localhost (spamd1-us-west.apache.org [10.40.0.7]) (amavisd-new, port 10024) with ESMTP id iX0zCxmAKSoS for ; Thu, 8 Mar 2018 02:48:03 +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 537D95F195 for ; Thu, 8 Mar 2018 02:48:02 +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 6C4D4E00A7 for ; Thu, 8 Mar 2018 02:48:01 +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 F037E253FD for ; Thu, 8 Mar 2018 02:48:00 +0000 (UTC) Date: Thu, 8 Mar 2018 02:48:00 +0000 (UTC) From: "wujinhu (JIRA)" To: common-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Comment Edited] (HADOOP-15262) AliyunOSS: rename() to move files in a directory in parallel MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/HADOOP-15262?page=3Dcom.atlassi= an.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D16= 390620#comment-16390620 ]=20 wujinhu edited comment on HADOOP-15262 at 3/8/18 2:47 AM: ---------------------------------------------------------- Attach HADOOP-15262.005.patch! Set a upper limit to waiting list size. With this patch resolved, users can improve copy performance by increase=C2= =A0*fs.oss.max.copy.threads* and=C2=A0*fs.oss.max.copy.tasks.per.dir*(Old v= ersion copies directory in series). Generally*,=C2=A0*the greater of the *f= s.oss.max.copy.threads* and=C2=A0**=C2=A0*fs.oss.max.copy.tasks.per.dir***,= the better(if we have enough resources) For example, if we set=C2=A0*fs.oss.max.copy.threads =3D 5* and=C2=A0**=C2= =A0*fs.oss.max.copy.tasks.per.dir =3D 5*, the copy time will reduce to 1/5 = of old version rename().=C2=A0** Here=C2=A0is one use case that drives us to have this=C2=A0improvement. Users use spark/tensorFlow/..... to train models and save models file to OS= S. However, the number of the model files is large, so it will be slow when= committing jobs because frameworks=C2=A0will call rename(). =C2=A0 was (Author: wujinhu): Attach HADOOP-15262.005.patch! Set a upper limit to waiting list size. With this patch resolved, users can improve copy performance by increase=C2= =A0*fs.oss.max.copy.threads* and=C2=A0*fs.oss.max.copy.tasks.per.dir*(Old v= ersion copies directory in series). Generally*,*=C2=A0the greater of the *f= s.oss.max.copy.threads* and=C2=A0**=C2=A0*fs.oss.max.copy.tasks.per.dir***,= the better(if we have enough resources) Here=C2=A0is one use case that drives us to have this=C2=A0improvement. Users use spark/tensorFlow/..... to train models and save models file to OS= S. However, the number of the model files is large, so it will be slow when= committing jobs because frameworks=C2=A0will call rename(). =C2=A0 > AliyunOSS: rename() to move files in a directory in parallel > ------------------------------------------------------------ > > Key: HADOOP-15262 > URL: https://issues.apache.org/jira/browse/HADOOP-15262 > Project: Hadoop Common > Issue Type: Sub-task > Components: fs/oss > Affects Versions: 3.0.0 > Reporter: wujinhu > Assignee: wujinhu > Priority: Major > Fix For: 3.1.0, 2.9.1, 3.0.1 > > Attachments: HADOOP-15262.001.patch, HADOOP-15262.002.patch, HADO= OP-15262.003.patch, HADOOP-15262.004.patch, HADOOP-15262.005.patch > > > Currently, rename() operation renames files in series. This will be slow = if a directory contains many files. So we can improve this by rename files = in=C2=A0parallel. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscribe@hadoop.apache.org For additional commands, e-mail: common-issues-help@hadoop.apache.org