Return-Path: X-Original-To: apmail-hbase-issues-archive@www.apache.org Delivered-To: apmail-hbase-issues-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id DED78F2DD for ; Fri, 5 Apr 2013 09:58:19 +0000 (UTC) Received: (qmail 88107 invoked by uid 500); 5 Apr 2013 09:58:19 -0000 Delivered-To: apmail-hbase-issues-archive@hbase.apache.org Received: (qmail 87784 invoked by uid 500); 5 Apr 2013 09:58:18 -0000 Mailing-List: contact issues-help@hbase.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Delivered-To: mailing list issues@hbase.apache.org Received: (qmail 87746 invoked by uid 99); 5 Apr 2013 09:58:18 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 05 Apr 2013 09:58:18 +0000 Date: Fri, 5 Apr 2013 09:58:18 +0000 (UTC) From: "Nicolas Liochon (JIRA)" To: issues@hbase.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HBASE-7247) Assignment performances decreased by 50% because of regionserver.OpenRegionHandler#tickleOpening 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/HBASE-7247?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Nicolas Liochon updated HBASE-7247: ----------------------------------- Status: Patch Available (was: Open) > Assignment performances decreased by 50% because of regionserver.OpenRegionHandler#tickleOpening > ------------------------------------------------------------------------------------------------ > > Key: HBASE-7247 > URL: https://issues.apache.org/jira/browse/HBASE-7247 > Project: HBase > Issue Type: Improvement > Components: master, Region Assignment, regionserver > Affects Versions: 0.96.0 > Reporter: Nicolas Liochon > Assignee: Nicolas Liochon > Fix For: 0.95.1 > > Attachments: 7247.v1.patch, 7247.v2.patch > > > The regionserver.OpenRegionHandler#tickleOpening updates the region znode as "Do this so master doesn't timeout this region-in-transition.". > However, on the usual test, this makes the assignment time of 1500 regions goes from 70s to 100s, that is, we're 50% slower because of this. > More generally, ZooKeper commits to disk all the data update, and this takes time. Using it to provide a keep alive seems overkill. At the very list, it could be made asynchronous. > I'm not sure how necessary these updates are required (I need to go deeper in the internal, feedback welcome), but it seems very important to optimize this... The trival fix would be to make this optional. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira