Return-Path: X-Original-To: apmail-hadoop-hdfs-issues-archive@minotaur.apache.org Delivered-To: apmail-hadoop-hdfs-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 2EA7B10AF2 for ; Tue, 21 Jan 2014 22:58:45 +0000 (UTC) Received: (qmail 15637 invoked by uid 500); 21 Jan 2014 22:58:37 -0000 Delivered-To: apmail-hadoop-hdfs-issues-archive@hadoop.apache.org Received: (qmail 15602 invoked by uid 500); 21 Jan 2014 22:58:37 -0000 Mailing-List: contact hdfs-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: hdfs-issues@hadoop.apache.org Delivered-To: mailing list hdfs-issues@hadoop.apache.org Received: (qmail 15592 invoked by uid 99); 21 Jan 2014 22:58:37 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 21 Jan 2014 22:58:37 +0000 Date: Tue, 21 Jan 2014 22:58:37 +0000 (UTC) From: "Andrew Wang (JIRA)" To: hdfs-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HDFS-4949) Centralized cache management in HDFS 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/HDFS-4949?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Andrew Wang updated HDFS-4949: ------------------------------ Attachment: hdfs-4949-branch-2.patch Attached is a consolidated patch for branch-2. Unfortunately we left the HDFS-4949 branch fallow while development continued in trunk, but I did my best to squash all of the caching-related patches committed thus far into this mega patch. A preliminary test run of HDFS and Common looked good, but I'm running another right now on this version of the patch to verify. > Centralized cache management in HDFS > ------------------------------------ > > Key: HDFS-4949 > URL: https://issues.apache.org/jira/browse/HDFS-4949 > Project: Hadoop HDFS > Issue Type: New Feature > Components: datanode, namenode > Affects Versions: 3.0.0, 2.4.0 > Reporter: Andrew Wang > Assignee: Andrew Wang > Attachments: HDFS-4949-consolidated.patch, caching-design-doc-2013-07-02.pdf, caching-design-doc-2013-08-09.pdf, caching-design-doc-2013-10-24.pdf, caching-testplan.pdf, hdfs-4949-branch-2.patch > > > HDFS currently has no support for managing or exposing in-memory caches at datanodes. This makes it harder for higher level application frameworks like Hive, Pig, and Impala to effectively use cluster memory, because they cannot explicitly cache important datasets or place their tasks for memory locality. -- This message was sent by Atlassian JIRA (v6.1.5#6160)