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 BDDA21767B for ; Mon, 10 Aug 2015 23:35:46 +0000 (UTC) Received: (qmail 13860 invoked by uid 500); 10 Aug 2015 23:35:46 -0000 Delivered-To: apmail-hbase-issues-archive@hbase.apache.org Received: (qmail 13803 invoked by uid 500); 10 Aug 2015 23:35:46 -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 13788 invoked by uid 99); 10 Aug 2015 23:35:46 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 10 Aug 2015 23:35:46 +0000 Date: Mon, 10 Aug 2015 23:35:46 +0000 (UTC) From: "Vandana Ayyalasomayajula (JIRA)" To: issues@hbase.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HBASE-13376) Improvements to Stochastic load balancer 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-13376?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vandana Ayyalasomayajula updated HBASE-13376: --------------------------------------------- Attachment: HBASE-13376_2.patch > Improvements to Stochastic load balancer > ---------------------------------------- > > Key: HBASE-13376 > URL: https://issues.apache.org/jira/browse/HBASE-13376 > Project: HBase > Issue Type: Improvement > Components: Balancer > Affects Versions: 1.0.0, 0.98.12 > Reporter: Vandana Ayyalasomayajula > Assignee: Vandana Ayyalasomayajula > Priority: Minor > Attachments: 13376-v2.txt, HBASE-13376.patch, HBASE-13376_0.98.txt, HBASE-13376_0.txt, HBASE-13376_1.txt, HBASE-13376_1_1.txt, HBASE-13376_2.patch, HBASE-13376_2_branch-1.patch, HBASE-13376_98.patch, HBASE-13376_branch-1.patch > > > There are two things this jira tries to address: > 1. The locality picker in the stochastic balancer does not pick regions with least locality as candidates for swap/move. So when any user configures locality cost in the configs, the balancer does not always seems to move regions with bad locality. > 2. When a cluster has equal number of loaded regions, it always picks the first one. It should pick a random region on one of the equally loaded servers. This improves a chance of finding a good candidate, when load picker is invoked several times. -- This message was sent by Atlassian JIRA (v6.3.4#6332)