Return-Path: Delivered-To: apmail-hadoop-zookeeper-user-archive@minotaur.apache.org Received: (qmail 50154 invoked from network); 12 May 2010 02:30:05 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 12 May 2010 02:30:05 -0000 Received: (qmail 52175 invoked by uid 500); 12 May 2010 02:30:05 -0000 Delivered-To: apmail-hadoop-zookeeper-user-archive@hadoop.apache.org Received: (qmail 52074 invoked by uid 500); 12 May 2010 02:30:05 -0000 Mailing-List: contact zookeeper-user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: zookeeper-user@hadoop.apache.org Delivered-To: mailing list zookeeper-user@hadoop.apache.org Received: (qmail 52058 invoked by uid 99); 12 May 2010 02:30:05 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 12 May 2010 02:30:05 +0000 X-ASF-Spam-Status: No, hits=2.2 required=10.0 tests=FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_NONE,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of abmargb@gmail.com designates 209.85.221.173 as permitted sender) Received: from [209.85.221.173] (HELO mail-qy0-f173.google.com) (209.85.221.173) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 12 May 2010 02:30:00 +0000 Received: by qyk4 with SMTP id 4so86347qyk.21 for ; Tue, 11 May 2010 19:29:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type; bh=z/Pn6qY0MBZwbA8b5qEeuLsZek7/m91vv3CfvNT+7gI=; b=eJLJ0iZdJgVYY0TOcj6VuWw0RJFSG5GDjddS4XpcEmrV/c0Gkij8wVhHCMH0tFhbpC EsfYWY54zmPLGv8NlvDtNSGAS2ff1Mfo25norSNa8LIhlJ9nDd5HKNJhKi5X5QA+FUxG +7YArl3nvbFMrOcaA+HROFGWAN3qRYQOgM2Xw= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=q+nKKS7UEwD9VTE5SKPHSie014zqDpsBj3POFmGRT5ol9R7YiD5Cm1sNeVuxXgiXsx KpNBGO91LTA5siZCqD+yG6doHmtLThI9Kz5TDVqf2hgTkYJXSjMBoMyovwPbrSMFk/fT +t9cWcoSz32ez2tlVvLo4Y8GlXtuRjmj8T4zc= MIME-Version: 1.0 Received: by 10.224.118.213 with SMTP id w21mr4373652qaq.253.1273631376268; Tue, 11 May 2010 19:29:36 -0700 (PDT) Received: by 10.229.95.194 with HTTP; Tue, 11 May 2010 19:29:36 -0700 (PDT) In-Reply-To: References: Date: Tue, 11 May 2010 23:29:36 -0300 Message-ID: Subject: Re: GSoC 2010: ZooKeeper Failure Detector Module From: Abmar Barros To: zookeeper-dev@hadoop.apache.org Cc: zookeeper-user@hadoop.apache.org Content-Type: multipart/alternative; boundary=00c09fa21e6ec2427604865c69fc --00c09fa21e6ec2427604865c69fc Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Thank you Adam! I had a first look at you code and your implementation will be certainly useful. Cheers! On Wed, May 5, 2010 at 8:41 PM, Adam Rosien wrote: > Hi Abmar, cool project! > > I wrote an implementation of the Phi Accrual Detector which I would be > happy to donate. It has the nice property that its parameters are > based on expectation odds rather than something more arbitrary like # > retries. > > You can steal it at http://github.com/arosien/failure. It works well > but let me know if you have any suggestions. > > .. Adam > > On Wed, May 5, 2010 at 1:28 PM, Abmar Barros wrote: > > Hello all, > > > > As Henry Robinson first introduced me, my name is Abmar Barros and I am > one > > of the GSoC accepted students for ZooKeeper. > > In the next 4 months, I will be being mentored by Flavio Junqueira in > order > > to improve ZooKeeper's failure detector module. In this project I will > > abstract the failure detection code to a separate module, in order to > make > > the code cleaner and to ease the implementation of new methods. Also, I > will > > implement several failure detectors and I will compare their > appropriateness > > for ZooKeeper. > > > > I have created a page ( > > http://wiki.apache.org/hadoop/ZooKeeper/GSoCFailureDetector) for this > > project in the ZooKeeper wiki and also there is a related JIRA issue ( > > https://issues.apache.org/jira/browse/ZOOKEEPER-702). > > > > Suggestions and specific requirements are always welcome :) > > > > Best regards > > > > -- > > Abmar Barros > > MSc candidate on Computer Science at Federal University of Campina Gran= de > - > > www.ufcg.edu.br > > OurGrid Team Member - www.ourgrid.org > > Para=EDba - Brazil > > > --=20 Abmar Barros MSc candidate on Computer Science at Federal University of Campina Grande - www.ufcg.edu.br OurGrid Team Member - www.ourgrid.org Para=EDba - Brazil --00c09fa21e6ec2427604865c69fc--