Return-Path: Delivered-To: apmail-hadoop-hbase-dev-archive@minotaur.apache.org Received: (qmail 74629 invoked from network); 23 Feb 2010 02:27:06 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 23 Feb 2010 02:27:06 -0000 Received: (qmail 87095 invoked by uid 500); 23 Feb 2010 02:27:05 -0000 Delivered-To: apmail-hadoop-hbase-dev-archive@hadoop.apache.org Received: (qmail 87031 invoked by uid 500); 23 Feb 2010 02:27:05 -0000 Mailing-List: contact hbase-dev-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: hbase-dev@hadoop.apache.org Delivered-To: mailing list hbase-dev@hadoop.apache.org Received: (qmail 87021 invoked by uid 99); 23 Feb 2010 02:27:05 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 23 Feb 2010 02:27:05 +0000 X-ASF-Spam-Status: No, hits=-1.8 required=10.0 tests=HTML_MESSAGE,RCVD_IN_DNSWL_MED,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of Kannan@facebook.com designates 69.63.179.25 as permitted sender) Received: from [69.63.179.25] (HELO mailout-snc1.facebook.com) (69.63.179.25) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 23 Feb 2010 02:26:58 +0000 Received: from mail.thefacebook.com ([192.168.18.104]) by pp01.snc1.tfbnw.net (8.14.3/8.14.3) with ESMTP id o1N2QNaQ012109 (version=TLSv1/SSLv3 cipher=RC4-MD5 bits=128 verify=NOT) for ; Mon, 22 Feb 2010 18:26:24 -0800 Received: from SC-MBXC1.TheFacebook.com ([192.168.18.102]) by sc-hub01.TheFacebook.com ([192.168.18.104]) with mapi; Mon, 22 Feb 2010 18:24:58 -0800 From: Kannan Muthukkaruppan To: "hbase-dev@hadoop.apache.org" Date: Mon, 22 Feb 2010 18:24:55 -0800 Subject: compactions & flushing Thread-Topic: compactions & flushing Thread-Index: Acq0L2NkfX9JN6AGQhO2NgR4rhsqmA== Message-ID: <7BC93F71D08F104A907F273FC6FF60AA6CEE4F8DDA@SC-MBXC1.TheFacebook.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_7BC93F71D08F104A907F273FC6FF60AA6CEE4F8DDASCMBXC1TheFac_" MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=1.12.8161:2.4.5,1.2.40,4.0.166 definitions=2010-02-23_02:2010-02-06,2010-02-22,2010-02-22 signatures=0 --_000_7BC93F71D08F104A907F273FC6FF60AA6CEE4F8DDASCMBXC1TheFac_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable The description for "hbase.hstore.compactionThreshold" in hbase-default.xml= says: <<< During a compaction, updates cannot be flushed to disk. >>> . What's the reason for this restriction? I couldn't spot where this is gett= ing enforced in the code. So wondering if the restriction is still true. regards, Kannan --_000_7BC93F71D08F104A907F273FC6FF60AA6CEE4F8DDASCMBXC1TheFac_--