Return-Path: X-Original-To: apmail-hadoop-common-issues-archive@minotaur.apache.org Delivered-To: apmail-hadoop-common-issues-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 85AA3114CB for ; Tue, 10 Jun 2014 22:07:07 +0000 (UTC) Received: (qmail 23686 invoked by uid 500); 10 Jun 2014 22:07:04 -0000 Delivered-To: apmail-hadoop-common-issues-archive@hadoop.apache.org Received: (qmail 23644 invoked by uid 500); 10 Jun 2014 22:07:04 -0000 Mailing-List: contact common-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: common-issues@hadoop.apache.org Delivered-To: mailing list common-issues@hadoop.apache.org Received: (qmail 23633 invoked by uid 99); 10 Jun 2014 22:07:04 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 10 Jun 2014 22:07:04 +0000 Date: Tue, 10 Jun 2014 22:07:04 +0000 (UTC) From: "Konstantin Shvachko (JIRA)" To: common-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HADOOP-10641) Introduce Coordination Engine MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/HADOOP-10641?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14027111#comment-14027111 ] Konstantin Shvachko commented on HADOOP-10641: ---------------------------------------------- > there's not much expertise in Hadoop for the general problem of distributed consensus I just want to make sure we are on the same page here. The intent of this jira is not to solve the general problem of distributed consensus. That is, I do not propose to build an implementation of paxos or other coordination algorithms here. This is only to introduce a common interface, so that real implementations such as ZooKeeper could be plugged into hadoop projects. > Introduce Coordination Engine > ----------------------------- > > Key: HADOOP-10641 > URL: https://issues.apache.org/jira/browse/HADOOP-10641 > Project: Hadoop Common > Issue Type: New Feature > Affects Versions: 3.0.0 > Reporter: Konstantin Shvachko > Assignee: Plamen Jeliazkov > Attachments: HADOOP-10641.patch, HADOOP-10641.patch, HADOOP-10641.patch > > > Coordination Engine (CE) is a system, which allows to agree on a sequence of events in a distributed system. In order to be reliable CE should be distributed by itself. > Coordination Engine can be based on different algorithms (paxos, raft, 2PC, zab) and have different implementations, depending on use cases, reliability, availability, and performance requirements. > CE should have a common API, so that it could serve as a pluggable component in different projects. The immediate beneficiaries are HDFS (HDFS-6469) and HBase (HBASE-10909). > First implementation is proposed to be based on ZooKeeper. -- This message was sent by Atlassian JIRA (v6.2#6252)