From user-return-35749-apmail-cassandra-user-archive=cassandra.apache.org@cassandra.apache.org Mon Aug 5 13:42:17 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 AA5A7100AF for ; Mon, 5 Aug 2013 13:42:17 +0000 (UTC) Received: (qmail 67326 invoked by uid 500); 5 Aug 2013 13:42:15 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 67302 invoked by uid 500); 5 Aug 2013 13:42:14 -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 67293 invoked by uid 99); 5 Aug 2013 13:42:14 -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 13:42:14 +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 74.125.83.49 as permitted sender) Received: from [74.125.83.49] (HELO mail-ee0-f49.google.com) (74.125.83.49) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 05 Aug 2013 13:42:08 +0000 Received: by mail-ee0-f49.google.com with SMTP id d41so1607468eek.36 for ; Mon, 05 Aug 2013 06:41:47 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=from:to:references:in-reply-to:subject:date:message-id:mime-version :content-type:x-mailer:thread-index:content-language :x-gm-message-state; bh=rglsXTxhQbMrKLb4PkrTDpC37UtydwpsYyeuPQ/qW7A=; b=kFppasLnYH1HmifjLQhNSZy9uhKW82UkW1+D+guXJanAhkcT3GS9Rtk6RUjJ86hcfQ h//fQux0RrxfsnioUr5qFIQPgvH82VlNpiYueHBmV7zPHO8adx7xzH5z6rma102YjAL7 and8JuxglIFCQ8xYDzes9tHTZ88v1QLjjT0P4SV0vnJfR25WJTFtzb+6LYTgIKjmXp5s JVnDEmX2jeIo30bRdViaMDZGuqDo/16cu8k1A3djU1BZoBi7dc29xQyTp7gyLP/vEmXk uWAMhv7IB+DXEhlZ/jlikcP4Dm4xC9HQQ29dU007yxCc5aa3QyAdIcPibrP4BFfuFQ25 tyEg== X-Received: by 10.14.241.74 with SMTP id f50mr17206611eer.29.1375710107475; Mon, 05 Aug 2013 06:41:47 -0700 (PDT) Received: from StevePereiraPC (46-65-46-17.zone16.bethere.co.uk. [46.65.46.17]) by mx.google.com with ESMTPSA id j2sm33390459eep.6.2013.08.05.06.41.46 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Mon, 05 Aug 2013 06:41:46 -0700 (PDT) From: "Christopher Wirt" To: References: <02ee01ce91cf$3a220950$ae661bf0$@struq.com> <441BC6E1-C4BD-4FE6-A2D8-BB88A8E4C424@expedia.com> In-Reply-To: <441BC6E1-C4BD-4FE6-A2D8-BB88A8E4C424@expedia.com> Subject: RE: Reducing the number of vnodes Date: Mon, 5 Aug 2013 14:41:45 +0100 Message-ID: <033501ce91e1$874cf5c0$95e6e140$@struq.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0336_01CE91E9.E912E460" X-Mailer: Microsoft Outlook 14.0 Thread-Index: AQIZOmt1U3Ok9cYkbgRRVWDuC6thaQG9eD3zmONcMrA= Content-Language: en-gb X-Gm-Message-State: ALoCoQn5vexp0uFR0bKRagNh8kjxZiTxYvNnqs+tVxH83Ok+b0KGzVqQGD1J037sTlHv319/4jxT X-Virus-Checked: Checked by ClamAV on apache.org This is a multipart message in MIME format. ------=_NextPart_000_0336_01CE91E9.E912E460 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit 1.2.4. Really hesitant to upgrade versions due to the inevitable issues it will cause. Guess I could upgrade a single node and let that run for a while before upgrading all nodes. From: Haithem Jarraya [mailto:a-hjarraya@expedia.com] Sent: 05 August 2013 13:04 To: user@cassandra.apache.org Subject: Re: Reducing the number of vnodes Chris, Which C* version are you running? You might want to do an upgrade to the latest version before reducing the vnode counts, a lot of fixes and improvement went in lately, it might help you getting your repair faster. H On 5 Aug 2013, at 12:30, Christopher Wirt wrote: 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_0336_01CE91E9.E912E460 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

1.2.4. Really hesitant to upgrade versions due to the inevitable = issues it will cause.

 

Guess I could upgrade a single node and let that run for a while = before upgrading all nodes.

 

From:= Haithem = Jarraya [mailto:a-hjarraya@expedia.com]
Sent: 05 August 2013 = 13:04
To: user@cassandra.apache.org
Subject: Re: = Reducing the number of vnodes

 

Chris,

Which = C* version are you running? 

You might want to do an upgrade to the latest version = before reducing the vnode counts, a lot of fixes and improvement went in = lately, it might help you getting your repair = faster.

 

H

 

On = 5 Aug 2013, at 12:30, Christopher Wirt <chris.wirt@struq.com> = wrote:



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<= /o:p>

 

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