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 95A4F100B8 for ; Fri, 25 Oct 2013 02:06:02 +0000 (UTC) Received: (qmail 53834 invoked by uid 500); 25 Oct 2013 02:06:02 -0000 Delivered-To: apmail-hadoop-hdfs-issues-archive@hadoop.apache.org Received: (qmail 53755 invoked by uid 500); 25 Oct 2013 02:06:02 -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 53746 invoked by uid 99); 25 Oct 2013 02:06:02 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 25 Oct 2013 02:06:02 +0000 Date: Fri, 25 Oct 2013 02:06:02 +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-consolidated.patch New patch attached. The RAT error is spurious due to the CHANGES-HDFS-4949.txt file. I also want to fix the edits unit test after we merge, since historically checking in the new binary file has been tricky to get right via patch. We've gotten clean unit test runs on upstream Jenkins, so I have confidence that it's correct. Finally, the javac warnings are also intentional, related to using the internal unmap APIs. > 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, 2.3.0 > Reporter: Andrew Wang > Assignee: Andrew Wang > Attachments: 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-consolidated.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#6144)