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 D798B182AB for ; Wed, 20 May 2015 02:49:00 +0000 (UTC) Received: (qmail 14103 invoked by uid 500); 20 May 2015 02:49:00 -0000 Delivered-To: apmail-hbase-issues-archive@hbase.apache.org Received: (qmail 14054 invoked by uid 500); 20 May 2015 02:49:00 -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 14042 invoked by uid 99); 20 May 2015 02:49:00 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 20 May 2015 02:49:00 +0000 Date: Wed, 20 May 2015 02:49:00 +0000 (UTC) From: "Liu Shaohui (JIRA)" To: issues@hbase.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HBASE-12451) IncreasingToUpperBoundRegionSplitPolicy may cause unnecessary region splits in rolling update of cluster 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-12451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14551703#comment-14551703 ] Liu Shaohui commented on HBASE-12451: ------------------------------------- [~jmspaggi] OK. I will rebase it in next few days. > IncreasingToUpperBoundRegionSplitPolicy may cause unnecessary region splits in rolling update of cluster > -------------------------------------------------------------------------------------------------------- > > Key: HBASE-12451 > URL: https://issues.apache.org/jira/browse/HBASE-12451 > Project: HBase > Issue Type: Bug > Reporter: Liu Shaohui > Assignee: Liu Shaohui > Priority: Minor > Fix For: 2.0.0 > > Attachments: HBASE-12451-v1.diff > > > Currently IncreasingToUpperBoundRegionSplitPolicy is the default region split policy. In this policy, split size is the number of regions that are on this server that all are of the same table, cubed, times 2x the region flush size. > But when unloading regions of a regionserver in a cluster using region_mover.rb, the number of regions that are on this server that all are of the same table will decrease, and the split size will decrease too, which may cause the left region split in the regionsever. Region Splits also happens when loading regions of a regionserver in a cluster. > A improvment may set a minimum split size in IncreasingToUpperBoundRegionSplitPolicy > Suggestions are welcomed. Thanks~ -- This message was sent by Atlassian JIRA (v6.3.4#6332)