From user-return-35744-apmail-cassandra-user-archive=cassandra.apache.org@cassandra.apache.org Mon Aug 5 11:31:20 2013 Return-Path: X-Original-To: apmail-cassandra-user-archive@www.apache.org Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 3A38410CB0 for ; Mon, 5 Aug 2013 11:31:20 +0000 (UTC) Received: (qmail 24221 invoked by uid 500); 5 Aug 2013 11:31:17 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 23974 invoked by uid 500); 5 Aug 2013 11:31:15 -0000 Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@cassandra.apache.org Delivered-To: mailing list user@cassandra.apache.org Received: (qmail 23966 invoked by uid 99); 5 Aug 2013 11:31:14 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 05 Aug 2013 11:31:14 +0000 X-ASF-Spam-Status: No, hits=1.5 required=5.0 tests=HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of chris.wirt@struq.com designates 74.125.83.52 as permitted sender) Received: from [74.125.83.52] (HELO mail-ee0-f52.google.com) (74.125.83.52) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 05 Aug 2013 11:31:08 +0000 Received: by mail-ee0-f52.google.com with SMTP id c41so1588332eek.11 for ; Mon, 05 Aug 2013 04:30:46 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=from:to:subject:date:message-id:mime-version:content-type:x-mailer :thread-index:content-language:x-gm-message-state; bh=UHpo7xp2olJuUrXt3ax0dq10wxipag1NP9y2glt1qaE=; b=Ndp8GV+YbNwbQyvaYD3zOfMYt+OSDPwzBhfHCl1cBgNW+P5NFyLio8wjkxC8r0Yh+E LGhYAGcz7OmrPweCdF4llp5XPzqYc2/S2pd4ZjR472C5VV7XesRNEtETKUkZL91RRmPi aFeSOWs1r/AuBWyq0AedEtqGjZDn1aC/OExObpNkYGgcVUBJoqKI3IzR92h81pWmmLpo LUWCytQ/z7H9183IVlks7sUIln21mJkJ1tbxy/4DPtLS2UwZ3HeLMCCNoz3nrnfTS3GH ZmXWEXDA43grF94Uxjp1W0AxUVoVOu3/l1+hKvY1fdsMg/7kSXOdoTkr4KxXOFfxrpoO Nq4Q== X-Received: by 10.15.95.4 with SMTP id bc4mr16430731eeb.40.1375702246555; Mon, 05 Aug 2013 04:30:46 -0700 (PDT) Received: from StevePereiraPC (46-65-46-17.zone16.bethere.co.uk. [46.65.46.17]) by mx.google.com with ESMTPSA id a4sm32661165eez.0.2013.08.05.04.30.45 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Mon, 05 Aug 2013 04:30:46 -0700 (PDT) From: "Christopher Wirt" To: Subject: Reducing the number of vnodes Date: Mon, 5 Aug 2013 12:30:44 +0100 Message-ID: <02ee01ce91cf$3a220950$ae661bf0$@struq.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_02EF_01CE91D7.9BE7F7F0" X-Mailer: Microsoft Outlook 14.0 Thread-Index: Ac6RzY2AAly1L609QQ6BInMpk+25Pw== Content-Language: en-gb X-Gm-Message-State: ALoCoQkCmY7vjuNOcrFU0r8gYwfBB+aAkKDV1C5XWqV0rYa+8/FhiGtisi4urQ9R8eUrU86Th8+d X-Virus-Checked: Checked by ClamAV on apache.org This is a multipart message in MIME format. ------=_NextPart_000_02EF_01CE91D7.9BE7F7F0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hi, I'm thinking about reducing the number of vnodes per server. We have 3 DC setup - one with 9 nodes, two with 3 nodes each. Each node has 256 vnodes. We've found that repair operations are beginning to take too long. Is reducing the number of vnodes to 64/32 likely to help our situation? What options do I have for achieving this in a live cluster? Thanks, Chris ------=_NextPart_000_02EF_01CE91D7.9BE7F7F0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi,

 

I’m = thinking about reducing the number of vnodes per = server.

 

We have 3 DC setup – one with 9 nodes, two with = 3 nodes each.

 

Each node has 256 vnodes. We’ve found that = repair operations are beginning to take too long.

 

Is reducing = the number of vnodes to 64/32 likely to help our = situation?

What options do I have for = achieving this in a live cluster?

 

 

Thanks,

 

Chris

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