From user-return-23878-apmail-cassandra-user-archive=cassandra.apache.org@cassandra.apache.org Wed Feb 1 08:49:34 2012 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 78A2F9FC2 for ; Wed, 1 Feb 2012 08:49:34 +0000 (UTC) Received: (qmail 13227 invoked by uid 500); 1 Feb 2012 08:49:31 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 12944 invoked by uid 500); 1 Feb 2012 08:49:19 -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 12935 invoked by uid 99); 1 Feb 2012 08:49:14 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 01 Feb 2012 08:49:14 +0000 X-ASF-Spam-Status: No, hits=3.8 required=5.0 tests=HTML_MESSAGE,HTTP_ESCAPED_HOST,RCVD_IN_DNSWL_LOW,SPF_NEUTRAL X-Spam-Check-By: apache.org Received-SPF: neutral (nike.apache.org: local policy) Received: from [213.199.154.143] (HELO DB3EHSOBE003.bigfish.com) (213.199.154.143) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 01 Feb 2012 08:49:05 +0000 Received: from mail88-db3-R.bigfish.com (10.3.81.230) by DB3EHSOBE003.bigfish.com (10.3.84.23) with Microsoft SMTP Server id 14.1.225.23; Wed, 1 Feb 2012 08:48:44 +0000 Received: from mail88-db3 (localhost [127.0.0.1]) by mail88-db3-R.bigfish.com (Postfix) with ESMTP id 91BE24605BA for ; Wed, 1 Feb 2012 08:48:44 +0000 (UTC) X-SpamScore: 0 X-BigFish: VPS0(zzc85fh62a3Kzz1202hzz8275bh8275dhz2dhc1bhc31hc1ahc1bhc31hc1ahc1bhc31hc1ahc1bhc31hc1ahc1bhc31hc1ah2a8h668h839hbe3k) X-Forefront-Antispam-Report: CIP:81.7.166.250;KIP:(null);UIP:(null);IPV:NLI;H:mail1.adform.com;RD:none;EFVD:NLI Received: from mail88-db3 (localhost.localdomain [127.0.0.1]) by mail88-db3 (MessageSwitch) id 1328086122931322_9791; Wed, 1 Feb 2012 08:48:42 +0000 (UTC) Received: from DB3EHSMHS002.bigfish.com (unknown [10.3.81.248]) by mail88-db3.bigfish.com (Postfix) with ESMTP id DF7A1220049 for ; Wed, 1 Feb 2012 08:48:42 +0000 (UTC) Received: from mail1.adform.com (81.7.166.250) by DB3EHSMHS002.bigfish.com (10.3.87.102) with Microsoft SMTP Server (TLS) id 14.1.225.23; Wed, 1 Feb 2012 08:48:42 +0000 Received: from DKEXC001.adform.com ([::1]) by DKEXC001.adform.com ([::1]) with mapi id 14.01.0355.002; Wed, 1 Feb 2012 10:48:41 +0200 From: Viktor Jevdokimov To: "user@cassandra.apache.org" Subject: Consurrent compactors Thread-Topic: Consurrent compactors Thread-Index: Aczguo8SPHfJRVtlRrq2+o72U2x2Ow== Date: Wed, 1 Feb 2012 08:48:41 +0000 Message-ID: <2C85E14562B39345BCCAD90B8E7955C9085DF0@DKEXC001.adform.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-originating-ip: [192.168.0.95] Content-Type: multipart/related; boundary="_006_2C85E14562B39345BCCAD90B8E7955C9085DF0DKEXC001adformcom_"; type="multipart/alternative" MIME-Version: 1.0 X-OriginatorOrg: adform.com X-Virus-Checked: Checked by ClamAV on apache.org --_006_2C85E14562B39345BCCAD90B8E7955C9085DF0DKEXC001adformcom_ Content-Type: multipart/alternative; boundary="_000_2C85E14562B39345BCCAD90B8E7955C9085DF0DKEXC001adformcom_" --_000_2C85E14562B39345BCCAD90B8E7955C9085DF0DKEXC001adformcom_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, When concurrent compactors are set to more then 1, it's rare when more than= 1 compaction is running in parallel. Didn't checked the source code, but it looks like when next compaction task= (any of minor, major, or cleanup) is for the same CF, it will not start in= parallel and next tasks are not checked. Will it be possible to check all tasks, not only the next one, to find whic= h of them can be started? This is actual especially when nightly cleanup is running, a lot of cleanup= tasks are pending, regular minor compactions are waiting until all cleanup= compactions are finished. Best regards/ Pagarbiai Viktor Jevdokimov Senior Developer Email: Viktor.Jevdokimov@adform.com Phone: +370 5 212 3063. Fax: +370 5 261 0453 J. Jasinskio 16C, LT-01112 Vilnius, Lithuania [Adform news] [Visit us!] Follow: [twitter] Visit our blog Disclaimer: The information contained in this message and attachments is in= tended solely for the attention and use of the named addressee and may be c= onfidential. If you are not the intended recipient, you are reminded that t= he information remains the property of the sender. You must not use, disclo= se, distribute, copy, print or rely on this e-mail. If you have received th= is message in error, please contact the sender immediately and irrevocably = delete this message and any copies. --_000_2C85E14562B39345BCCAD90B8E7955C9085DF0DKEXC001adformcom_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi,

 

When concurrent compactors are = set to more then 1, it’s rare when more than 1 compaction is running = in parallel.

 

Didn’t checked the source= code, but it looks like when next compaction task (any of minor, major, or= cleanup) is for the same CF, it will not start in parallel and next tasks = are not checked.

 

Will it be possible to check al= l tasks, not only the next one, to find which of them can be started?<= /o:p>

 

This is actual especially when = nightly cleanup is running, a lot of cleanup tasks are pending, regular min= or compactions are waiting until all cleanup compactions are finished.=

 

 

 

Best regards/ Pagarbiai

 

Viktor Jevdokimov

Senior Developer

 

Email:  Viktor.Jevdokimov@adform.com

Phone: +370 5 212 3063. Fax: +370 5 261 0453

J. Jasinskio 16C, LT-01112 Vil= nius, Lithuania

 

 

3D"Adform

3D"Visit

Follow:

V= isit our blog

Disclaimer: The information c= ontained in this message and attachments is intended solely for the attenti= on and use of the named addressee and may be confidential. If you are not the intended recipient, you are remind= ed that the information remains the property of the sender. You must not us= e, disclose, distribute, copy, print or rely on this e-mail. If you have re= ceived this message in error, please contact the sender immediately and irrevocably delete this message and any= copies.


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