Return-Path: X-Original-To: apmail-ambari-dev-archive@www.apache.org Delivered-To: apmail-ambari-dev-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id C897D1885A for ; Wed, 30 Dec 2015 13:04:36 +0000 (UTC) Received: (qmail 51900 invoked by uid 500); 30 Dec 2015 13:04:06 -0000 Delivered-To: apmail-ambari-dev-archive@ambari.apache.org Received: (qmail 51875 invoked by uid 500); 30 Dec 2015 13:04:06 -0000 Mailing-List: contact dev-help@ambari.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@ambari.apache.org Delivered-To: mailing list dev@ambari.apache.org Received: (qmail 51823 invoked by uid 99); 30 Dec 2015 13:04:06 -0000 Received: from Unknown (HELO arcas) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 30 Dec 2015 13:04:06 +0000 Received: from arcas.apache.org (localhost [127.0.0.1]) by arcas (Postfix) with ESMTP id 9A1BB2C14F9 for ; Wed, 30 Dec 2015 13:03:49 +0000 (UTC) Date: Wed, 30 Dec 2015 13:03:49 +0000 (UTC) From: "Dmytro Sen (JIRA)" To: dev@ambari.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (AMBARI-14524) HDFS Recommendation: dfs.datanode.du.reserved should be set to 10%-15% of volume size 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/AMBARI-14524?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Dmytro Sen updated AMBARI-14524: -------------------------------- Attachment: AMBARI-14524.patch > HDFS Recommendation: dfs.datanode.du.reserved should be set to 10%-15% of volume size > ------------------------------------------------------------------------------------- > > Key: AMBARI-14524 > URL: https://issues.apache.org/jira/browse/AMBARI-14524 > Project: Ambari > Issue Type: Bug > Components: stacks > Affects Versions: 2.1.0 > Reporter: Dmytro Sen > Assignee: Dmytro Sen > Priority: Critical > Fix For: 2.4.0 > > Attachments: AMBARI-14524.patch > > > PROBLEM: Ambari should give recommendations on this setting: dfs.datanode.du.reserved > The default is 1GB and that is too low for a lot of our production customers. If this is too low and the space on the datanode fills up, the nodemanagers will start failing the health checks and we get into a bad state with not enough nodemanagers being up. At this point the admin tries to run the balancer and hope that it will balance very quickly. > There should be a recommendation on this value based on the disk space available in the datanode volume. In addition, if the user sets it too low there should be a warning saying this will cause problems if enough buffer is not kept. -- This message was sent by Atlassian JIRA (v6.3.4#6332)