Return-Path: Delivered-To: apmail-incubator-cassandra-user-archive@minotaur.apache.org Received: (qmail 39649 invoked from network); 16 Dec 2009 19:06:03 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 16 Dec 2009 19:06:03 -0000 Received: (qmail 53125 invoked by uid 500); 16 Dec 2009 19:06:03 -0000 Delivered-To: apmail-incubator-cassandra-user-archive@incubator.apache.org Received: (qmail 53103 invoked by uid 500); 16 Dec 2009 19:06:03 -0000 Mailing-List: contact cassandra-user-help@incubator.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: cassandra-user@incubator.apache.org Delivered-To: mailing list cassandra-user@incubator.apache.org Received: (qmail 53094 invoked by uid 99); 16 Dec 2009 19:06:03 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 16 Dec 2009 19:06:03 +0000 X-ASF-Spam-Status: No, hits=-2.6 required=5.0 tests=AWL,BAYES_00 X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of bburruss@real.com designates 207.188.23.7 as permitted sender) Received: from [207.188.23.7] (HELO cir-el.real.com) (207.188.23.7) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 16 Dec 2009 19:06:01 +0000 Received: from seacas02.corp.real.com ([::ffff:192.168.139.57]) (TLS: TLSv1/SSLv3,128bits,AES128-SHA) by cir-el.real.com with esmtp; Wed, 16 Dec 2009 11:05:40 -0800 id 001FC0E9.4B292F84.0000652A Received: from seambx.corp.real.com ([fe80::2d15:fda7:b3b8:e268]) by seacas02.corp.real.com ([::1]) with mapi; Wed, 16 Dec 2009 11:05:39 -0800 From: Brian Burruss To: "cassandra-user@incubator.apache.org" Date: Wed, 16 Dec 2009 11:03:27 -0800 Subject: read/write latency definition Thread-Topic: read/write latency definition Thread-Index: AQHKfoLCf8ckB5H1Ekm09bpM/294Tg== Message-ID: <766B5A29D28DA442AB229AAEE2AFC44507D7B914F3@SEAMBX.corp.real.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 what exactly is the definition of latency as reported by tpstats? is it th= e complete time spent in the cassandra server, minus sending response to cl= ient? that would be nice if it is ;) if it isn't, what metrics can i use to account for the time in the server? = trying to account for time so i can determine best course for optimizing. thx=