From user-return-16405-apmail-cassandra-user-archive=cassandra.apache.org@cassandra.apache.org Tue May 3 20:08:59 2011 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 E3934284E for ; Tue, 3 May 2011 20:08:58 +0000 (UTC) Received: (qmail 88710 invoked by uid 500); 3 May 2011 20:08:57 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 88679 invoked by uid 500); 3 May 2011 20:08:57 -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 88671 invoked by uid 99); 3 May 2011 20:08:56 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 03 May 2011 20:08:56 +0000 X-ASF-Spam-Status: No, hits=2.9 required=5.0 tests=FREEMAIL_FROM,FS_REPLICA,RCVD_IN_DNSWL_LOW,RFC_ABUSE_POST,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of jbellis@gmail.com designates 209.85.216.44 as permitted sender) Received: from [209.85.216.44] (HELO mail-qw0-f44.google.com) (209.85.216.44) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 03 May 2011 20:08:51 +0000 Received: by qwc23 with SMTP id 23so346168qwc.31 for ; Tue, 03 May 2011 13:08:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:from:date :message-id:subject:to:content-type:content-transfer-encoding; bh=2CK2uJyj3vgCitD3cg1irRBzCi7UvrxN0sm72xBj8bc=; b=pMEKl4iUMt5ftv+2WQ/zWu8qspp+Iif1mIT1dEiikKEhbndd3kUyYCpTko4XGWmFIj JnYjXvqDvsHVAbg3AaGnWwkOvoae5keigaIPrdTnDClXY/GnuFmoKj6AGe/c8QCbGrPp FCgxBPfxRQlhRLbsLplAJdrrptD+yqdgV3O6I= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type:content-transfer-encoding; b=aMqRPj0RRLifY6ofSZNxry3nRpCzhL22qfWQaf2QkOSf1+1mnja06wAYO+cvPFZwtP SVXhGp7A0SRO7ysVOM7HV4wGA2XcNeCjZvgMtWr8j0aWH7hBqEgopaHYQy+K2Anpmk5W pHZRbIf34z5etxaaV2D0e4Ucr3pl2VcVrfTGY= Received: by 10.52.98.34 with SMTP id ef2mr293359vdb.293.1304453310062; Tue, 03 May 2011 13:08:30 -0700 (PDT) MIME-Version: 1.0 Received: by 10.52.184.65 with HTTP; Tue, 3 May 2011 13:08:10 -0700 (PDT) In-Reply-To: <1CE9163D-12AE-40BF-8E35-1D959FBBA3D7@thelastpickle.com> References: <707E9B09-AA4A-4C2A-A43B-114CC38DC9FF@thelastpickle.com> <912616C2-08C3-4481-97C5-870F964697DB@thelastpickle.com> <1CE9163D-12AE-40BF-8E35-1D959FBBA3D7@thelastpickle.com> From: Jonathan Ellis Date: Tue, 3 May 2011 15:08:10 -0500 Message-ID: Subject: Re: Replica data distributing between racks To: user@cassandra.apache.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Virus-Checked: Checked by ClamAV on apache.org On Tue, May 3, 2011 at 2:46 PM, aaron morton wrot= e: > Jonathan, > =A0 =A0 =A0 =A0I think you are saying each DC should have it's own (logic= al) token ring. Right. (Only with NTS, although you'd usually end up with a similar effect if you alternate DC locations for nodes in a ONTS cluster.) > =A0 =A0 =A0 =A0But currently two endpoints cannot have the same token reg= ardless of the DC they are in. Also right. > Or should people just bump the tokens in extra DC's to avoid the collisio= n? Yes. --=20 Jonathan Ellis Project Chair, Apache Cassandra co-founder of DataStax, the source for professional Cassandra support http://www.datastax.com