Return-Path: X-Original-To: apmail-hbase-issues-archive@www.apache.org Delivered-To: apmail-hbase-issues-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id BD17610110 for ; Fri, 18 Oct 2013 23:48:42 +0000 (UTC) Received: (qmail 29722 invoked by uid 500); 18 Oct 2013 23:48:42 -0000 Delivered-To: apmail-hbase-issues-archive@hbase.apache.org Received: (qmail 29684 invoked by uid 500); 18 Oct 2013 23:48:42 -0000 Mailing-List: contact issues-help@hbase.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Delivered-To: mailing list issues@hbase.apache.org Received: (qmail 29675 invoked by uid 99); 18 Oct 2013 23:48:42 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 18 Oct 2013 23:48:42 +0000 Date: Fri, 18 Oct 2013 23:48:42 +0000 (UTC) From: "Vladimir Rodionov (JIRA)" To: issues@hbase.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HBASE-9769) Improve performance of a Scanner with explicit column list when rows are small/medium 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/HBASE-9769?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Vladimir Rodionov updated HBASE-9769: ------------------------------------- Release Note: The feature allows to improve performance of scan operations when table rows are small/medium size and scan operation contains explicit set of column:qualifiers to filter on. By default, the feature is disabled. To enable it set Scan.HINT_NARROW_ROWS attribute of Scan object instance: Scan scan = ... scan.setAttribute(Scan.HINT_NARROW_ROWS, "true".getBytes()); The performance improvement depends on a average row size. The smaller rows are - the larger performance improvement is. was: The feature allows to improve performance of scan operations when table rows are small/medium size. By default, it is disabled. To enable feature set Scan.HINT_NARROW_ROWS attribute: Scan scan = ... scan.setAttribute(Scan.HINT_NARROW_ROWS, "true".getBytes()); The performance improvement depends on a average row size. The smaller rows are - the larger performance improvement is. > Improve performance of a Scanner with explicit column list when rows are small/medium size > ------------------------------------------------------------------------------------------ > > Key: HBASE-9769 > URL: https://issues.apache.org/jira/browse/HBASE-9769 > Project: HBase > Issue Type: Improvement > Components: Scanners > Affects Versions: 0.98.0, 0.94.12, 0.96.0 > Reporter: Vladimir Rodionov > Assignee: Vladimir Rodionov > Attachments: 9769-0.94-sample1.txt, 9769-0.94-sample2.txt, 9769-0.94-sample.txt, 9769-94.txt, 9769-94-v2.txt, 9769-trunk-v1.txt, 9769-trunk-v2.txt, 9769-trunk-v3.txt, 9769-trunk-v4.txt > > -- This message was sent by Atlassian JIRA (v6.1#6144)