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 5BB5E10227 for ; Mon, 24 Mar 2014 05:28:48 +0000 (UTC) Received: (qmail 46108 invoked by uid 500); 24 Mar 2014 05:28:48 -0000 Delivered-To: apmail-cassandra-commits-archive@cassandra.apache.org Received: (qmail 45853 invoked by uid 500); 24 Mar 2014 05:28:46 -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 45814 invoked by uid 99); 24 Mar 2014 05:28:44 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 24 Mar 2014 05:28:44 +0000 Date: Mon, 24 Mar 2014 05:28:44 +0000 (UTC) From: "Ryan McGuire (JIRA)" To: commits@cassandra.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Comment Edited] (CASSANDRA-6746) Reads have a slow ramp up in speed 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-6746?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13944760#comment-13944760 ] Ryan McGuire edited comment on CASSANDRA-6746 at 3/24/14 5:28 AM: ------------------------------------------------------------------ [~benedict] can you confirm if my stress options look alright for mixed mode, do you have a better suggestion? was (Author: enigmacurry): @benedict can you confirm if my stress options look alright for mixed mode, do you have a better suggestion? > Reads have a slow ramp up in speed > ---------------------------------- > > Key: CASSANDRA-6746 > URL: https://issues.apache.org/jira/browse/CASSANDRA-6746 > Project: Cassandra > Issue Type: Bug > Components: Core > Reporter: Ryan McGuire > Assignee: Benedict > Labels: performance > Fix For: 2.1 beta2 > > Attachments: 2.1_vs_2.0_read.png, 6746-buffered-io-tweaks.png, 6746-patched.png, 6746.blockdev_setra.full.png, 6746.blockdev_setra.zoomed.png, 6746.buffered_io_tweaks.logs.tar.gz, 6746.buffered_io_tweaks.write-flush-compact-mixed.png, 6746.buffered_io_tweaks.write-read-flush-compact.png, 6746.txt, buffered-io-tweaks.patch, cassandra-2.0-bdplab-trial-fincore.tar.bz2, cassandra-2.1-bdplab-trial-fincore.tar.bz2 > > > On a physical four node cluister I am doing a big write and then a big read. The read takes a long time to ramp up to respectable speeds. > !2.1_vs_2.0_read.png! > [See data here|http://ryanmcguire.info/ds/graph/graph.html?stats=stats.2.1_vs_2.0_vs_1.2.retry1.json&metric=interval_op_rate&operation=stress-read&smoothing=1] -- This message was sent by Atlassian JIRA (v6.2#6252)