Return-Path: Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: (qmail 99071 invoked from network); 20 Mar 2010 13:44:49 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 20 Mar 2010 13:44:49 -0000 Received: (qmail 20612 invoked by uid 500); 20 Mar 2010 13:44:48 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 20598 invoked by uid 500); 20 Mar 2010 13:44:48 -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 20590 invoked by uid 99); 20 Mar 2010 13:44:48 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Sat, 20 Mar 2010 13:44:48 +0000 X-ASF-Spam-Status: No, hits=2.2 required=10.0 tests=FREEMAIL_FROM,HTML_MESSAGE,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of gpcuster@gmail.com designates 74.125.83.172 as permitted sender) Received: from [74.125.83.172] (HELO mail-pv0-f172.google.com) (74.125.83.172) by apache.org (qpsmtpd/0.29) with ESMTP; Sat, 20 Mar 2010 13:44:39 +0000 Received: by pvh1 with SMTP id 1so2162337pvh.31 for ; Sat, 20 Mar 2010 06:44:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:date:message-id:subject :from:to:content-type; bh=DkODHjS/Em/RSafldkFUXKxdBB5acibUAXh5Y9I9PWo=; b=MJNjp217RGPR0LExAVnr+wqyNKnuakfKdwTLzSEqVanbDzpZsJmENxVUnVcLdl0WRC +Inc2u0ibPpWzUY/1MCKxtWqjztD9stq6L+GWxlWIQow4SrQzIA5Eqwo18+qy6o7Y8uL 3o1/ANL3Ibr6ELAKY/fpjkyJSx+Gks/rPmsSw= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=ZshVDswic2Ww/o0m2mmNuiWisFk5n5wWHr/drhFBhpE7VbXSXeTOswAnMxVP2F3FvA HpAqj+iEEZ/QNXQeX3jK/cUfCxhTP7kL6ba1gDXUeecgpo+PxfUjW2dzFEmiMgKUyYQD qPUY7xp08WtigSESEv3D6lDYgXpJCTC6P09J0= MIME-Version: 1.0 Received: by 10.143.180.5 with SMTP id h5mr2188622wfp.298.1269092657819; Sat, 20 Mar 2010 06:44:17 -0700 (PDT) Date: Sat, 20 Mar 2010 21:44:17 +0800 Message-ID: <47d8831a1003200644p429e6b22j47c26c18b2440f8d@mail.gmail.com> Subject: why Cassandra 0.5.1 write speed is very slow From: =?GB2312?B?ufnF9A==?= To: user@cassandra.apache.org Content-Type: multipart/alternative; boundary=000e0cd608420e767e04823ba9de X-Virus-Checked: Checked by ClamAV on apache.org --000e0cd608420e767e04823ba9de Content-Type: text/plain; charset=ISO-8859-1 Hi: I'm doing a research on move our data from MySQL to Cassandra 0.5.1 At first, I am doing it in the Windows XP, and read the record from MySQL then insert it into Cassandra. The write speed is ok, about 18,000 records per second. But when I changed it into the 5 Linux Red Hat 5 Server, doing the same opertation, the write speed in downto 1000 records per second. Why would this happend? I am using the default config. -- Regards Peng Guo --000e0cd608420e767e04823ba9de Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi:

I'm doing a research on move our data from MySQL to Cassandr= a 0.5.1

At first, I am doing it in the Windows XP, and read the reco= rd from MySQL then insert it into Cassandra. The write speed is ok, about 1= 8,000 records per second.

But when I changed it into the 5 Linux Red Hat 5 Server, doing the same= opertation, the write speed in downto 1000 records per second.

Why= would this happend?

I am using the default config.

--
Regards
=A0 =A0Peng Guo
--000e0cd608420e767e04823ba9de--