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 6807F17770 for ; Tue, 14 Oct 2014 05:32:23 +0000 (UTC) Received: (qmail 65997 invoked by uid 500); 14 Oct 2014 05:32:21 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 65964 invoked by uid 500); 14 Oct 2014 05:32:20 -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 65954 invoked by uid 99); 14 Oct 2014 05:32:20 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 14 Oct 2014 05:32:20 +0000 X-ASF-Spam-Status: No, hits=-0.7 required=5.0 tests=RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of siddharth.karandikar@gmail.com designates 209.85.216.181 as permitted sender) Received: from [209.85.216.181] (HELO mail-qc0-f181.google.com) (209.85.216.181) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 14 Oct 2014 05:32:16 +0000 Received: by mail-qc0-f181.google.com with SMTP id r5so6048843qcx.26 for ; Mon, 13 Oct 2014 22:31:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=GceYjuf5kwE+gOneBrjeOR0SoHuJwulxoSvuP6BxPI0=; b=I3CIUX9/eG/jnlVeRk12dWIdSAULavFkZV2Mpn3k2+Cu+O4IOOLQ0PdGYE4DCwF3nn uvjBGkFYqh+jAot7P9vsWPUSXjVSB73h2V4eqtq409WOXqiMOhhFCplgQMAYjX5S5pdW hWMicGRq0BITPNrGdYfPXQmLInMJPTjNDM5jaPHlf21pZt7btXkoPmSojbDYN8bB0YgY tCs8osFE8XfLSIiyQmDn0jbwquKvLW5Csl4fJav7TvWLHqpKv6RwYnSVp9s5oOc6Dsk+ MFSWrGmQQx0S4WK50XC5iTDI7+Xl1MGbPo/I4zo5LGaS4ifLnj9JV+VgGtCjDObvLksE XW/Q== MIME-Version: 1.0 X-Received: by 10.224.24.131 with SMTP id v3mr5393981qab.100.1413264715878; Mon, 13 Oct 2014 22:31:55 -0700 (PDT) Received: by 10.140.27.246 with HTTP; Mon, 13 Oct 2014 22:31:55 -0700 (PDT) In-Reply-To: References: Date: Tue, 14 Oct 2014 11:01:55 +0530 Message-ID: Subject: Re: Internode latency requirements From: Siddharth Karandikar To: user@cassandra.apache.org Content-Type: text/plain; charset=UTF-8 X-Virus-Checked: Checked by ClamAV on apache.org Thanks Alex for inputs. As you said, choosing right consistency levels will be critical here. On Mon, Oct 13, 2014 at 8:37 PM, Alex Major wrote: > Just make sure you understand the effect of consistency levels on your > performance. You (probably) don't want to be going over the WAN for reads > etc. > > We run across the US/EU AWS regions and don't have any problems with higher > RTT. > > On Mon, Oct 13, 2014 at 2:51 AM, Siddharth Karandikar > wrote: >> >> Thanks for confirmation. >> >> Anyone has any other important points that need to keep in mind for such >> distributed-distributed deployments? >> >> On 10 Oct 2014 23:13, "Robert Coli" wrote: >>> >>> On Fri, Oct 10, 2014 at 1:56 AM, Siddharth Karandikar >>> wrote: >>>> >>>> Lets say I want to deploy ~200 cassandra nodes and each of them >>>> running at different geographic location. Distance between any 2 nodes >>>> will range from 5ms to 40ms in terms of RTT. I plan to configure nodes >>>> close to each other in one datacenter. And such multiple datacenters >>>> will be connected to each other. >>> >>> >>> That's fine? >>> >>> People run multi-DC over much slower WAN links than that. >>> >>> =Rob >>> http://twitter.com/rcolidba > >