Return-Path: X-Original-To: archive-asf-public-internal@cust-asf2.ponee.io Delivered-To: archive-asf-public-internal@cust-asf2.ponee.io Received: from cust-asf.ponee.io (cust-asf.ponee.io [163.172.22.183]) by cust-asf2.ponee.io (Postfix) with ESMTP id 1741D200CBD for ; Thu, 6 Jul 2017 18:44:11 +0200 (CEST) Received: by cust-asf.ponee.io (Postfix) id 15F2A166E00; Thu, 6 Jul 2017 16:44:11 +0000 (UTC) Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by cust-asf.ponee.io (Postfix) with SMTP id 66218166DFE for ; Thu, 6 Jul 2017 18:44:10 +0200 (CEST) Received: (qmail 26313 invoked by uid 500); 6 Jul 2017 16:44:04 -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 26288 invoked by uid 99); 6 Jul 2017 16:44:03 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd2-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 06 Jul 2017 16:44:03 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd2-us-west.apache.org (ASF Mail Server at spamd2-us-west.apache.org) with ESMTP id 6A1961A7B0F for ; Thu, 6 Jul 2017 16:44:03 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd2-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -99.202 X-Spam-Level: X-Spam-Status: No, score=-99.202 tagged_above=-999 required=6.31 tests=[KAM_ASCII_DIVIDERS=0.8, RP_MATCHES_RCVD=-0.001, SPF_PASS=-0.001, USER_IN_WHITELIST=-100] autolearn=disabled Received: from mx1-lw-us.apache.org ([10.40.0.8]) by localhost (spamd2-us-west.apache.org [10.40.0.9]) (amavisd-new, port 10024) with ESMTP id QjtRPAojZWaB for ; Thu, 6 Jul 2017 16:44:02 +0000 (UTC) Received: from mailrelay1-us-west.apache.org (mailrelay1-us-west.apache.org [209.188.14.139]) by mx1-lw-us.apache.org (ASF Mail Server at mx1-lw-us.apache.org) with ESMTP id 771B15FBBB for ; Thu, 6 Jul 2017 16:44:02 +0000 (UTC) Received: from jira-lw-us.apache.org (unknown [207.244.88.139]) by mailrelay1-us-west.apache.org (ASF Mail Server at mailrelay1-us-west.apache.org) with ESMTP id A48F6E0DCF for ; Thu, 6 Jul 2017 16:44:01 +0000 (UTC) Received: from jira-lw-us.apache.org (localhost [127.0.0.1]) by jira-lw-us.apache.org (ASF Mail Server at jira-lw-us.apache.org) with ESMTP id 9F91C24682 for ; Thu, 6 Jul 2017 16:44:00 +0000 (UTC) Date: Thu, 6 Jul 2017 16:44:00 +0000 (UTC) From: "Ariel Weisberg (JIRA)" To: commits@cassandra.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (CASSANDRA-13664) RangeFetchMapCalculator should not try to optimise 'trivial' ranges MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 archived-at: Thu, 06 Jul 2017 16:44:11 -0000 [ https://issues.apache.org/jira/browse/CASSANDRA-13664?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16076867#comment-16076867 ] Ariel Weisberg commented on CASSANDRA-13664: -------------------------------------------- Changes makes sense to me. Can you run the dtests just to sanity check? > RangeFetchMapCalculator should not try to optimise 'trivial' ranges > ------------------------------------------------------------------- > > Key: CASSANDRA-13664 > URL: https://issues.apache.org/jira/browse/CASSANDRA-13664 > Project: Cassandra > Issue Type: Bug > Reporter: Marcus Eriksson > Assignee: Marcus Eriksson > Fix For: 4.x > > > RangeFetchMapCalculator (CASSANDRA-4650) tries to make the number of streams out of each node as even as possible. > In a typical multi-dc ring the nodes in the dcs are setup using token + 1, creating many tiny ranges. If we only try to optimise over the number of streams, it is likely that the amount of data streamed out of each node is unbalanced. > We should ignore those trivial ranges and only optimise the big ones, then share the tiny ones over the nodes. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscribe@cassandra.apache.org For additional commands, e-mail: commits-help@cassandra.apache.org