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 1DFA6105C5 for ; Mon, 9 Feb 2015 14:28:35 +0000 (UTC) Received: (qmail 8915 invoked by uid 500); 9 Feb 2015 14:28:34 -0000 Delivered-To: apmail-cassandra-commits-archive@cassandra.apache.org Received: (qmail 8870 invoked by uid 500); 9 Feb 2015 14:28:34 -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 8858 invoked by uid 99); 9 Feb 2015 14:28:34 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 09 Feb 2015 14:28:34 +0000 Date: Mon, 9 Feb 2015 14:28:34 +0000 (UTC) From: "Aleksey Yeschenko (JIRA)" To: commits@cassandra.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (CASSANDRA-8730) Optimize UUIDType comparisons 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-8730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14312274#comment-14312274 ] Aleksey Yeschenko commented on CASSANDRA-8730: ---------------------------------------------- What Benedict said below. For the sake of testing this ticket, go with a simpler clustering column set - only the uuid, no timestamp. > Optimize UUIDType comparisons > ----------------------------- > > Key: CASSANDRA-8730 > URL: https://issues.apache.org/jira/browse/CASSANDRA-8730 > Project: Cassandra > Issue Type: Improvement > Reporter: J.B. Langston > Assignee: Benedict > Fix For: 2.1.4 > > > Compaction is slow on tables using compound keys containing UUIDs due to being CPU bound by key comparison. [~benedict] said he sees some easy optimizations that could be made for UUID comparison. -- This message was sent by Atlassian JIRA (v6.3.4#6332)