Return-Path: X-Original-To: apmail-accumulo-notifications-archive@minotaur.apache.org Delivered-To: apmail-accumulo-notifications-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 6764910AA6 for ; Tue, 13 Jan 2015 15:47:33 +0000 (UTC) Received: (qmail 44129 invoked by uid 500); 13 Jan 2015 15:47:35 -0000 Delivered-To: apmail-accumulo-notifications-archive@accumulo.apache.org Received: (qmail 44088 invoked by uid 500); 13 Jan 2015 15:47:35 -0000 Mailing-List: contact notifications-help@accumulo.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: jira@apache.org Delivered-To: mailing list notifications@accumulo.apache.org Received: (qmail 44071 invoked by uid 99); 13 Jan 2015 15:47:34 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 13 Jan 2015 15:47:34 +0000 Date: Tue, 13 Jan 2015 15:47:34 +0000 (UTC) From: "Josh Elser (JIRA)" To: notifications@accumulo.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (ACCUMULO-3471) Adding a new tserver puts some tables offline for few minutes 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/ACCUMULO-3471?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14275419#comment-14275419 ] Josh Elser commented on ACCUMULO-3471: -------------------------------------- We don't use ZooKeeper for assignments like HBase does. My guess would be that Eric's pending changes in ACCUMULO-3188 should help as (AFAIK) it's primarily an {{accumulo.metadata}} operation and RPC to tservers. > Adding a new tserver puts some tables offline for few minutes > ------------------------------------------------------------- > > Key: ACCUMULO-3471 > URL: https://issues.apache.org/jira/browse/ACCUMULO-3471 > Project: Accumulo > Issue Type: Bug > Components: tserver > Affects Versions: 1.6.1 > Environment: Ubuntu 12.04 > Reporter: Denis Petrov > Fix For: 1.6.2, 1.7.0 > > > I run an Accumulo cluster with 15 tservers with about 6000 tablets on each (disks are quite slow - each node has 2*4Tb SATA) > When a new tserver added to the cluster, the rebalancing procedure starts. > During this procedure some tablets are offline and unreachable during 5-10 minutes. > It is visible in http://monitor:50095/tables and by timeouts on client side. > The rebalancing caused by killing a tserver converges much faster then rebalancing caused by adding a tserver. -- This message was sent by Atlassian JIRA (v6.3.4#6332)