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 043D991F4 for ; Mon, 12 Dec 2011 05:01:32 +0000 (UTC) Received: (qmail 4017 invoked by uid 500); 12 Dec 2011 05:01:29 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 3980 invoked by uid 500); 12 Dec 2011 05:01:20 -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 3964 invoked by uid 99); 12 Dec 2011 05:01:17 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 12 Dec 2011 05:01:17 +0000 X-ASF-Spam-Status: No, hits=2.9 required=5.0 tests=HTML_MESSAGE,RCVD_IN_DNSWL_NONE,SPF_NEUTRAL X-Spam-Check-By: apache.org Received-SPF: neutral (athena.apache.org: 98.139.52.66 is neither permitted nor denied by domain of mail4qf@gmail.com) Received: from [98.139.52.66] (HELO nm2-vm0.bullet.mail.ac4.yahoo.com) (98.139.52.66) by apache.org (qpsmtpd/0.29) with SMTP; Mon, 12 Dec 2011 05:01:08 +0000 Received: from [98.139.52.190] by nm2.bullet.mail.ac4.yahoo.com with NNFMP; 12 Dec 2011 05:00:47 -0000 Received: from [98.139.52.163] by tm3.bullet.mail.ac4.yahoo.com with NNFMP; 12 Dec 2011 05:00:47 -0000 Received: from [127.0.0.1] by omp1046.mail.ac4.yahoo.com with NNFMP; 12 Dec 2011 05:00:47 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 315747.2923.bm@omp1046.mail.ac4.yahoo.com Received: (qmail 40613 invoked by uid 60001); 12 Dec 2011 05:00:46 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1323666046; bh=MCB+zE+PIeHNuQFqRAa/ytvwGUc9snrB+RGQUmVhAe4=; h=X-YMail-OSG:Received:X-RocketYMMF:X-Mailer:Message-ID:Date:From:Reply-To:Subject:To:MIME-Version:Content-Type; b=qVrfJQ+vcmsGSqL/u2V2DtAkDNFbISEQjp0+rv8qqY/MF5HwOjW1o1de27131lAb+NQ4PeNSi0F3yZTh5AFe2vauMNle7nxqdOudYL92jxFHbNVo5wMcaArCIlagQf15/p2fU5etmQvaZNlDKV6+9JM9qqYTon74H02RrhinWK8= X-YMail-OSG: RtzatOwVM1lXtaBPJwicByjpqBu45vm4kfLrpPMPAOsaUy_ QCy4rB.zYXtrij_r1uwBhFqA2WzeQgv4earmSv3HPwJyWYoWaRyeE6cjmeRu YT0OMn4we1ylddAYiAbTX0UkTs1cCRfEF5wE8Gb9N6Nv65rqZwbpBMETN_6g eJ__Y9VKnFmUFHUXdNrwDL1KgTrGmWrf6RNOBV5iwLaKxjN3_VFI7187GtQu dRfO7.c_776ZCzPnOZV2iwxzLj9AUsFTynQXBXOto22drAxsHrbcxcqRncpm R.R_HDZn3lrhrv2XtUDmyBVY67aOV4II17Cs8.vpIgV_0a5zI19JZeSi.Gkn jF7Sm3fi_VGTIShL0X8Nu_LqQbRwt4r8ivUHfkOzfDa5_GHnpY7Jv7VYDPMa vKZuqsXrM1gjfnvDXhrdOA4BC8ZickaYSKcz4TqpcnB_lCXgrXtXomku2IQ- - Received: from [99.43.40.151] by web31802.mail.mud.yahoo.com via HTTP; Sun, 11 Dec 2011 21:00:46 PST X-RocketYMMF: fengqu X-Mailer: YahooMailWebService/0.8.116.331537 Message-ID: <1323666046.86223.YahooMailNeo@web31802.mail.mud.yahoo.com> Date: Sun, 11 Dec 2011 21:00:46 -0800 (PST) From: Feng Qu Reply-To: Feng Qu Subject: read/write counts To: Cassandra User Group MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-1036955950-905455542-1323666046=:86223" ---1036955950-905455542-1323666046=:86223 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Hello,=0A=0AWhen I use nodetool cfstas, I see read/write for both keyspace = and column family. I assume both number are counted across the ring, but I = saw different read/write counts showed on one node comparing to other 7 nod= es.=0A=0Anode 1,2,4-8:=0AKeyspace: XXXXks=0A=A0 =A0 =A0 =A0 Read Count: 442= 85565=0A=A0 =A0 =A0 =A0 Read Latency: 1.4984792287509485 ms.=0A=A0 =A0 =A0 = =A0 Write Count: 161096052=0A=A0 =A0 =A0 =A0 Write Latency: 0.0063213004127= 50028 ms.=0A=A0 =A0 =A0 =A0 Pending Tasks: 0=0A=A0 =A0 =A0 =A0 =A0 =A0 =A0 = =A0 Column Family: XXXXEvents=0A=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Read Count:= 44219534=0A=0A=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Read Latency: NaN ms.=0A=A0 = =A0 =A0 =A0 =A0 =A0 =A0 =A0 Write Count: 43245679=0A=A0 =A0 =A0 =A0 =A0 =A0= =A0 =A0 Write Latency: 0.012 ms.=0A=0ANode 3:=0AKeyspace: XXXXks=0A=0A=A0 = =A0 =A0 =A0 Read Count: 44190641=0A=A0 =A0 =A0 =A0 Read Latency: 1.73831358= 0810018 ms.=0A=A0 =A0 =A0 =A0 Write Count: 136735281=0A=A0 =A0 =A0 =A0 Writ= e Latency: 0.007389342133285994 ms.=0A=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Colum= n Family: XXXXEvents=0A=0A=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Read Count: 44125= 278=0A=0A=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Read Latency: NaN ms.=0A=A0 =A0 = =A0 =A0 =A0 =A0 =A0 =A0 Write Count: 36991005=0A=A0 =A0 =A0 =A0 =A0 =A0 =A0= =A0 Write Latency: 0.010 ms.=0A=0ASo my questions are:=0A1) Are KS level c= ounts and CF level counts for whole cluster or just for an individual node?= =0A2) Why I see different counts from different nodes if counts are at KS l= evel?=0A=A0=0AFeng ---1036955950-905455542-1323666046=:86223 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Hello,
= When I use nodetool cfstas, I see read/write for both keyspace and co= lumn family. I assume both number are counted across the ring, but I saw di= fferent read/write counts showed on one node comparing to other 7 nodes.

node= 1,2,4-8:
Keyspace: XXXXks
  &nb= sp;     Read Count: 44285565
        R= ead Latency: 1.4984792287509485 ms.
        W= rite Count: 161096052
        Write Latency: = 0.006321300412750028 ms.
        Pending Task= s: 0
               = Column Family: XXXXEvents
          &nb= sp;     Read Count: 44219534
      &= nbsp;         Read Latency: NaN ms.
  &n= bsp;             Write Count: 43245679
<= div>                Write Latency: = 0.012 ms.

Node 3:
Keyspace: XXXXks
&nbs= p;       Read Count: 44190641
     =   Read Latency: 1.738313580810018 ms.
        Write Count: 136735281
       = Write Latency: 0.007389342133285994 ms.
      &nb= sp;         Column Family: XXXXEvents
                Read Count:= 44125278
              &n= bsp; Read Latency: NaN ms.
          &nb= sp;     Write Count: 36991005
      &nbs= p;         Write Latency: 0.010 ms.

So = my questions are:
1) Are KS level counts and CF level counts for whole cluster or just for an individual node?
2) Why I see different counts from different = nodes if counts are at KS level?
 
Feng ---1036955950-905455542-1323666046=:86223--