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 8034D19578 for ; Mon, 4 Apr 2016 15:36:05 +0000 (UTC) Received: (qmail 2301 invoked by uid 500); 4 Apr 2016 15:36:03 -0000 Delivered-To: apmail-hbase-user-archive@hbase.apache.org Received: (qmail 2229 invoked by uid 500); 4 Apr 2016 15:36:03 -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 2217 invoked by uid 99); 4 Apr 2016 15:36:03 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd1-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 04 Apr 2016 15:36:03 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd1-us-west.apache.org (ASF Mail Server at spamd1-us-west.apache.org) with ESMTP id E11DAC7A75 for ; Mon, 4 Apr 2016 15:36:02 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd1-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: 0.183 X-Spam-Level: X-Spam-Status: No, score=0.183 tagged_above=-999 required=6.31 tests=[DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=2, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, RP_MATCHES_RCVD=-0.996, SPF_PASS=-0.001] autolearn=disabled Authentication-Results: spamd1-us-west.apache.org (amavisd-new); dkim=pass (2048-bit key) header.d=yahoo.com Received: from mx2-lw-us.apache.org ([10.40.0.8]) by localhost (spamd1-us-west.apache.org [10.40.0.7]) (amavisd-new, port 10024) with ESMTP id dbrvpA2DzB9W for ; Mon, 4 Apr 2016 15:36:02 +0000 (UTC) Received: from nm4.bullet.mail.bf1.yahoo.com (nm4.bullet.mail.bf1.yahoo.com [98.139.212.163]) by mx2-lw-us.apache.org (ASF Mail Server at mx2-lw-us.apache.org) with ESMTPS id C0A315F20E for ; Mon, 4 Apr 2016 15:36:01 +0000 (UTC) Received: from [98.139.170.182] by nm4.bullet.mail.bf1.yahoo.com with NNFMP; 04 Apr 2016 15:36:01 -0000 Received: from [98.139.212.227] by tm25.bullet.mail.bf1.yahoo.com with NNFMP; 04 Apr 2016 15:36:01 -0000 Received: from [127.0.0.1] by omp1036.mail.bf1.yahoo.com with NNFMP; 04 Apr 2016 15:36:01 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 374724.9052.bm@omp1036.mail.bf1.yahoo.com X-YMail-OSG: UvO3evEVM1lztP8KMjPyLvNp69thjco16Uz_FiYoQQxwv3jVHrSbW8Vy1RhQNwt .aDtBeIQ.wkDbZTaQvK7uDgk8nxwi7P6qlI..HxiIPh6dxuTuOeqTK49U_xyr.kL6THyVZLyQLbW oUU62io3I81ONPoeQSMCpwlNsoCMWe9IHlkuJI8vOCaONUS_tY2HVg29.hlq7ctNyGn9o7ygNCko 2yP6o4c8Gg_OvDvrwJi21IoVfQT24hl2FlIs33ppNcj_REFRAHmfnVyPa5wNQo35OzUEs8XVatfQ BJEXuJB_oHeQX4soSzJtNvHZHoKeOmXm2sWDS6E78FTdLkhsPH4PVKfYjoqsHpx5_l_FdcAlGQ_t M7x186nhnyWuvfaDHlLKjU6OcWud.GeG45xd1e6UocNvhNxU.u6HiXBgg3ZdBgIlN40G4WtX50Nd _GhCCfmgvnA42WvXHjyk.HAzCfHhCUEszp0ZpXsrE6qTgSs7LGOnhEziAo4RPudzif_DuvS4ENkt as.37mgUgM7ouUN8rGnY- Received: by 66.196.80.114; Mon, 04 Apr 2016 15:36:00 +0000 Date: Mon, 4 Apr 2016 15:35:59 +0000 (UTC) From: Sumit Nigam Reply-To: Sumit Nigam To: User Message-ID: <867548231.2580606.1459784159946.JavaMail.yahoo@mail.yahoo.com> Subject: Major compaction MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_2580605_298901188.1459784159937" References: <867548231.2580606.1459784159946.JavaMail.yahoo.ref@mail.yahoo.com> ------=_Part_2580605_298901188.1459784159937 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi, Are there major overheads to running major compaction frequently? As much a= s I know, it produces one Hfile for a region and processes delete markers a= nd version related drops. So, if this process has happened once say. a few = mins back then another major compaction should ideally not cause much harm.= =C2=A0 Why I am trying to understand this is because Hbase also sets it to 24 hour= default (for time based compaction) and I am looking to lower it to say 20= mins to reduce stress by spreading the load. Or am I completely off-track? Thanks,Sumit ------=_Part_2580605_298901188.1459784159937--