Return-Path: X-Original-To: apmail-hbase-user-archive@www.apache.org Delivered-To: apmail-hbase-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id EF5139457 for ; Tue, 22 Nov 2011 23:56:07 +0000 (UTC) Received: (qmail 83483 invoked by uid 500); 22 Nov 2011 23:56:06 -0000 Delivered-To: apmail-hbase-user-archive@hbase.apache.org Received: (qmail 83395 invoked by uid 500); 22 Nov 2011 23:56:05 -0000 Mailing-List: contact user-help@hbase.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@hbase.apache.org Delivered-To: mailing list user@hbase.apache.org Received: (qmail 83387 invoked by uid 99); 22 Nov 2011 23:56:05 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 22 Nov 2011 23:56:05 +0000 X-ASF-Spam-Status: No, hits=-0.7 required=5.0 tests=RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of jeffw@qualtrics.com designates 209.85.210.169 as permitted sender) Received: from [209.85.210.169] (HELO mail-iy0-f169.google.com) (209.85.210.169) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 22 Nov 2011 23:55:58 +0000 Received: by iaek3 with SMTP id k3so1110250iae.14 for ; Tue, 22 Nov 2011 15:55:35 -0800 (PST) Received: by 10.42.161.196 with SMTP id u4mr297078icx.31.1322006135720; Tue, 22 Nov 2011 15:55:35 -0800 (PST) Received: from [10.1.50.1] (199-58-199-98.acedc.net. [199.58.199.98]) by mx.google.com with ESMTPS id e2sm65765155ibe.0.2011.11.22.15.55.34 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 22 Nov 2011 15:55:34 -0800 (PST) Message-ID: <4ECC3677.4070202@qualtrics.com> Date: Tue, 22 Nov 2011 16:55:35 -0700 From: Jeff Whiting User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20111105 Thunderbird/8.0 MIME-Version: 1.0 To: user@hbase.apache.org Subject: network spike every 2 hours Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Checked: Checked by ClamAV on apache.org We have a hadoop cluster that is only running hbase. We recently installed ganglia to monitor those servers. Looking over the network graphs about every 2 hours there is a very large spike. Before the spike we are pushing about 5mb but during the spikes it is around 60-100mb. I'm pretty sure we aren't running anything, is hbase doing something that could cause those spikes? Thanks, ~Jeff -- Jeff Whiting Qualtrics Senior Software Engineer jeffw@qualtrics.com