Return-Path: Delivered-To: apmail-hadoop-mapreduce-issues-archive@minotaur.apache.org Received: (qmail 43223 invoked from network); 19 Mar 2010 17:08:51 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 19 Mar 2010 17:08:51 -0000 Received: (qmail 24011 invoked by uid 500); 19 Mar 2010 17:08:51 -0000 Delivered-To: apmail-hadoop-mapreduce-issues-archive@hadoop.apache.org Received: (qmail 23949 invoked by uid 500); 19 Mar 2010 17:08:51 -0000 Mailing-List: contact mapreduce-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: mapreduce-issues@hadoop.apache.org Delivered-To: mailing list mapreduce-issues@hadoop.apache.org Received: (qmail 23927 invoked by uid 99); 19 Mar 2010 17:08:51 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 19 Mar 2010 17:08:51 +0000 X-ASF-Spam-Status: No, hits=-2000.0 required=10.0 tests=ALL_TRUSTED X-Spam-Check-By: apache.org Received: from [140.211.11.140] (HELO brutus.apache.org) (140.211.11.140) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 19 Mar 2010 17:08:48 +0000 Received: from brutus.apache.org (localhost [127.0.0.1]) by brutus.apache.org (Postfix) with ESMTP id 50B54234C4AE for ; Fri, 19 Mar 2010 17:08:27 +0000 (UTC) Message-ID: <200999596.367311269018507329.JavaMail.jira@brutus.apache.org> Date: Fri, 19 Mar 2010 17:08:27 +0000 (UTC) From: "Hudson (JIRA)" To: mapreduce-issues@hadoop.apache.org Subject: [jira] Commented: (MAPREDUCE-1593) [Rumen] Improvements to random seed generation In-Reply-To: <584164053.213981268346987203.JavaMail.jira@brutus.apache.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 X-Virus-Checked: Checked by ClamAV on apache.org [ https://issues.apache.org/jira/browse/MAPREDUCE-1593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12847443#action_12847443 ] Hudson commented on MAPREDUCE-1593: ----------------------------------- Integrated in Hadoop-Mapreduce-trunk #263 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-Mapreduce-trunk/263/]) . [Rumen] Improvements to random seed generation (tamas via mahadev) > [Rumen] Improvements to random seed generation > ----------------------------------------------- > > Key: MAPREDUCE-1593 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-1593 > Project: Hadoop Map/Reduce > Issue Type: Improvement > Affects Versions: 0.21.0, 0.22.0 > Reporter: Tamas Sarlos > Assignee: Tamas Sarlos > Priority: Trivial > Fix For: 0.22.0 > > Attachments: MAPREDUCE-1593-20100311-dup.patch > > > RandomSeedGenerator introduced in MAPREDUCE-1306 could be more efficient by reusing the MD5 object across calls. Wrapping the MD5 in a ThreadLocal makes the call thread safe as well. Neither of these is an issue with the current client, the mumak simulator, but the changes are small and make the code more useful in the future. Thanks to Chris Douglas for the suggestion. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.