Return-Path: X-Original-To: apmail-cassandra-commits-archive@www.apache.org Delivered-To: apmail-cassandra-commits-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 60DE795D1 for ; Mon, 13 Feb 2012 12:17:23 +0000 (UTC) Received: (qmail 53137 invoked by uid 500); 13 Feb 2012 12:17:23 -0000 Delivered-To: apmail-cassandra-commits-archive@cassandra.apache.org Received: (qmail 52957 invoked by uid 500); 13 Feb 2012 12:17:22 -0000 Mailing-List: contact commits-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@cassandra.apache.org Delivered-To: mailing list commits@cassandra.apache.org Received: (qmail 52935 invoked by uid 99); 13 Feb 2012 12:17:22 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 13 Feb 2012 12:17:22 +0000 X-ASF-Spam-Status: No, hits=-2000.0 required=5.0 tests=ALL_TRUSTED,T_RP_MATCHES_RCVD X-Spam-Check-By: apache.org Received: from [140.211.11.116] (HELO hel.zones.apache.org) (140.211.11.116) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 13 Feb 2012 12:17:21 +0000 Received: from hel.zones.apache.org (hel.zones.apache.org [140.211.11.116]) by hel.zones.apache.org (Postfix) with ESMTP id DDFDE1B4BA9 for ; Mon, 13 Feb 2012 12:17:00 +0000 (UTC) Date: Mon, 13 Feb 2012 12:17:00 +0000 (UTC) From: "Dave Brosius (Commented) (JIRA)" To: commits@cassandra.apache.org Message-ID: <185683466.31433.1329135420910.JavaMail.tomcat@hel.zones.apache.org> In-Reply-To: <1742026128.67845.1327345901741.JavaMail.tomcat@hel.zones.apache.org> Subject: [jira] [Commented] (CASSANDRA-3772) Evaluate Murmur3-based partitioner 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/CASSANDRA-3772?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13206830#comment-13206830 ] Dave Brosius commented on CASSANDRA-3772: ----------------------------------------- With 10,000 inserts i'm seeing the same ratios, which i'm having a hard time describing why as again the hash function itself is about the same time. > Evaluate Murmur3-based partitioner > ---------------------------------- > > Key: CASSANDRA-3772 > URL: https://issues.apache.org/jira/browse/CASSANDRA-3772 > Project: Cassandra > Issue Type: New Feature > Reporter: Jonathan Ellis > Fix For: 1.2 > > Attachments: try_murmur3.diff > > > MD5 is a relatively heavyweight hash to use when we don't need cryptographic qualities, just a good output distribution. Let's see how much overhead we can save by using Murmur3 instead. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira