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 E98DE10AE1 for ; Fri, 16 Aug 2013 23:12:48 +0000 (UTC) Received: (qmail 38147 invoked by uid 500); 16 Aug 2013 23:12:48 -0000 Delivered-To: apmail-hadoop-common-issues-archive@hadoop.apache.org Received: (qmail 38113 invoked by uid 500); 16 Aug 2013 23:12:48 -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 38104 invoked by uid 99); 16 Aug 2013 23:12:48 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 16 Aug 2013 23:12:48 +0000 Date: Fri, 16 Aug 2013 23:12:48 +0000 (UTC) From: "Omkar Vinit Joshi (JIRA)" To: common-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HADOOP-9639) truly shared cache for jars (jobjar/libjar) 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-9639?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13742703#comment-13742703 ] Omkar Vinit Joshi commented on HADOOP-9639: ------------------------------------------- something similar.. YARN-1020 > truly shared cache for jars (jobjar/libjar) > ------------------------------------------- > > Key: HADOOP-9639 > URL: https://issues.apache.org/jira/browse/HADOOP-9639 > Project: Hadoop Common > Issue Type: New Feature > Components: filecache > Affects Versions: 2.0.4-alpha > Reporter: Sangjin Lee > Assignee: Sangjin Lee > > Currently there is the distributed cache that enables you to cache jars and files so that attempts from the same job can reuse them. However, sharing is limited with the distributed cache because it is normally on a per-job basis. On a large cluster, sometimes copying of jobjars and libjars becomes so prevalent that it consumes a large portion of the network bandwidth, not to speak of defeating the purpose of "bringing compute to where data is". This is wasteful because in most cases code doesn't change much across many jobs. > I'd like to propose and discuss feasibility of introducing a truly shared cache so that multiple jobs from multiple users can share and cache jars. This JIRA is to open the discussion. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira