Return-Path: Delivered-To: apmail-hbase-user-archive@www.apache.org Received: (qmail 12813 invoked from network); 20 Aug 2010 00:53:56 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 20 Aug 2010 00:53:56 -0000 Received: (qmail 29960 invoked by uid 500); 20 Aug 2010 00:53:55 -0000 Delivered-To: apmail-hbase-user-archive@hbase.apache.org Received: (qmail 29884 invoked by uid 500); 20 Aug 2010 00:53:54 -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 29876 invoked by uid 99); 20 Aug 2010 00:53:54 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 20 Aug 2010 00:53:54 +0000 X-ASF-Spam-Status: No, hits=-0.1 required=10.0 tests=HTML_MESSAGE,RCVD_IN_DNSWL_MED X-Spam-Check-By: apache.org Received-SPF: unknown (athena.apache.org: error in processing during lookup of agsharma@ebay.com) Received: from [216.33.244.7] (HELO rhv-mipot-002.corp.ebay.com) (216.33.244.7) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 20 Aug 2010 00:53:48 +0000 DomainKey-Signature: s=corp; d=ebay.com; c=nofws; q=dns; h=X-EBay-Corp:X-IronPort-AV:Received:Received:From:To:Date: Subject:Thread-Topic:Thread-Index:Message-ID: Accept-Language:Content-Language:X-MS-Has-Attach: X-MS-TNEF-Correlator:acceptlanguage:x-ems-proccessed: x-ems-stamp:Content-Type:MIME-Version:X-CFilter; b=g3dcPtTNp1juZJbmZO+8SNTNdSALj5NTaDI5zdCvvTP3ZEMqWdz4ABXp +wlV7PN9xDMVqhG6Cm/xryNz7ihKBnDENMVwkw4nOpBlHRaiouNZQDNfI 5JpQ9JU63O94Gt4; DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=ebay.com; i=agsharma@ebay.com; q=dns/txt; s=corp; t=1282265628; x=1313801628; h=from:to:date:subject:message-id:mime-version; z=From:=20"Sharma,=20Avani"=20|To:=20"u ser@hbase.apache.org"=20|Date:=20T hu,=2019=20Aug=202010=2017:53:22=20-0700|Subject:=20impro ving=20random=20read=20performance|Message-ID:=20|MIME-Version:=201.0; bh=KOWONoEg3k1jBK0itV14scTlnWx6llDd+ubTt5dbMEU=; b=01Z+8GEG1PoRFqKYM5BqhdwexUxFDZx24tMP7pbU4duY8NGDNr1Gg28+ xx+Ihlc3D+UDjYk3/nYs6IQogCB2hau8Kojo7ZuTu72vhoLhW66b1PMnS qMh73JrrxCAalzY; X-EBay-Corp: Yes X-IronPort-AV: E=Sophos;i="4.56,236,1280732400"; d="scan'208,217";a="29943000" Received: from rhv-vtenf-001.corp.ebay.com (HELO RHV-MEXHT-002.corp.ebay.com) ([10.112.113.52]) by rhv-mipot-002.corp.ebay.com with ESMTP; 19 Aug 2010 17:53:25 -0700 Received: from RHV-MEXMS-002.corp.ebay.com ([10.245.17.114]) by RHV-MEXHT-002.corp.ebay.com ([10.245.24.101]) with mapi; Thu, 19 Aug 2010 17:53:25 -0700 From: "Sharma, Avani" To: "user@hbase.apache.org" Date: Thu, 19 Aug 2010 17:53:22 -0700 Subject: improving random read performance Thread-Topic: improving random read performance Thread-Index: ActAAharnj541KgUR06yjKfoZqnwBQ== Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US x-ems-proccessed: 10SqDH0iR7ekR7SRpKqm5A== x-ems-stamp: UtR2tr51sxOd1TxtdKshSw== Content-Type: multipart/alternative; boundary="_000_DE357E04199C8A4782DA2C8130FD64CA01132D6DB0RHVMEXMS002co_" MIME-Version: 1.0 X-CFilter: Scanned --_000_DE357E04199C8A4782DA2C8130FD64CA01132D6DB0RHVMEXMS002co_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I am currently running under Hbasev0.20.3. I increased the block cache to .= 4 from .2. The heap size is 2GB. The default regionserver handler count is 25 in hbase-default.xml. Will try= LZO compression. What are other performance tunings I can do ? In particular, will applying HBASE-2180 or upgrading to a newer version hel= p ? Another thing I notice is that the performance via stargate vs Java api is = comparable for random reads.I thought stargate would have some latency. Is = this expected? Thanks, Avani --_000_DE357E04199C8A4782DA2C8130FD64CA01132D6DB0RHVMEXMS002co_--