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 067E1100D2 for ; Mon, 3 Mar 2014 07:45:14 +0000 (UTC) Received: (qmail 80449 invoked by uid 500); 3 Mar 2014 07:45:10 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 80120 invoked by uid 500); 3 Mar 2014 07:45:03 -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 80112 invoked by uid 99); 3 Mar 2014 07:45:02 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 03 Mar 2014 07:45:02 +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 efinley.lists@gmail.com designates 209.85.220.181 as permitted sender) Received: from [209.85.220.181] (HELO mail-vc0-f181.google.com) (209.85.220.181) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 03 Mar 2014 07:44:56 +0000 Received: by mail-vc0-f181.google.com with SMTP id lg15so3232855vcb.12 for ; Sun, 02 Mar 2014 23:44:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=viKG9eXY+P1yZTQfHKmtNlHmFrQ3D78N0YT865mJIrs=; b=l66/odMhANZpnUagkg/m2aqfmt+RTlFV91UFkKFaLt+FLBFwCUJLuhToxOcoxgwU/U qUZy/u3eO2MIlTuaFPrY67CJnTt6dp1MjPWCoXD+DsKzfnGEfhhNzFXrk+d5QbRZ3Tfe MlbxrNkrSOLZ0U1AFlDNJdqRru3ET5wjR+FBidT7Re7J/nifcHhtC9MpUBf9z1aZu5Lj x8CKtbiVkq65boz/mGaKTr9y+SaAKbOmrrLYw/r0WVDkalUp71iXzXw8HrqRz0Vlle4p UnUzPiU+nch4RD4y1J3LFNeuhhkU1Fou+vg8u8cR4enFkwzWZVi8/Cfg1iBSWzPHxVf7 DGrw== MIME-Version: 1.0 X-Received: by 10.52.30.230 with SMTP id v6mr24649908vdh.6.1393832675716; Sun, 02 Mar 2014 23:44:35 -0800 (PST) Received: by 10.52.32.4 with HTTP; Sun, 2 Mar 2014 23:44:35 -0800 (PST) Date: Mon, 3 Mar 2014 00:44:35 -0700 Message-ID: Subject: How does Cassandra handle inter Data Center congestion From: Elliot Finley To: user@cassandra.apache.org Content-Type: multipart/alternative; boundary=bcaec51d2eb883333904f3aef5b9 X-Virus-Checked: Checked by ClamAV on apache.org --bcaec51d2eb883333904f3aef5b9 Content-Type: text/plain; charset=ISO-8859-1 I'm going to plagiarize a question previously asked by graham sanderson , I hope he doesn't mind. The question hasn't been answered but it was at the end of a thread that wasn't directly related to this question, so maybe it hasn't been seen by the right people. Does anyone know off the top of their head what happens if data is being written at LOCAL_QUORUM to a multi data center setup faster than the inter data center link can handle... something has to block, throw an exception, die, or have unbounded growth (memory, threads, on disk hints etc) somewhere along the line ;-) Thanks in advanced, Elliot --bcaec51d2eb883333904f3aef5b9 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable

I'm going to plagiarize a question previously asked by graham sanderson, I hope he doesn=
9;t mind.  The question hasn't been answered but it was at the end of a=
 thread that wasn't directly related to this question, so maybe it hasn=
't been seen by the right people.


Does anyone know off the top of their head what happens if data is bein=
g written at LOCAL_QUORUM to a multi data center setup faster than the inte=
r data center link can handle… something has to block, throw an exce=
ption, die, or have unbounded growth (memory, threads, on disk hints etc) s=
omewhere along the line ;-)

Thanks in advanced,

Elliot

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