From notifications-return-47125-archive-asf-public=cust-asf.ponee.io@accumulo.apache.org Sun Jan 6 02:24:10 2019 Return-Path: X-Original-To: archive-asf-public@cust-asf.ponee.io Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by mx-eu-01.ponee.io (Postfix) with SMTP id 7B84E180645 for ; Sun, 6 Jan 2019 02:24:09 +0100 (CET) Received: (qmail 55626 invoked by uid 500); 6 Jan 2019 01:24:08 -0000 Mailing-List: contact notifications-help@accumulo.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: jira@apache.org Delivered-To: mailing list notifications@accumulo.apache.org Received: (qmail 55612 invoked by uid 99); 6 Jan 2019 01:24:08 -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; Sun, 06 Jan 2019 01:24:08 +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 25636C6972 for ; Sun, 6 Jan 2019 01:24:08 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd1-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -110.301 X-Spam-Level: X-Spam-Status: No, score=-110.301 tagged_above=-999 required=6.31 tests=[ENV_AND_HDR_SPF_MATCH=-0.5, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, USER_IN_DEF_SPF_WL=-7.5, USER_IN_WHITELIST=-100] autolearn=disabled Received: from mx1-lw-eu.apache.org ([10.40.0.8]) by localhost (spamd1-us-west.apache.org [10.40.0.7]) (amavisd-new, port 10024) with ESMTP id F8CxFLN6gDql for ; Sun, 6 Jan 2019 01:24:06 +0000 (UTC) Received: from mailrelay1-us-west.apache.org (mailrelay1-us-west.apache.org [209.188.14.139]) by mx1-lw-eu.apache.org (ASF Mail Server at mx1-lw-eu.apache.org) with ESMTP id 57EB65FE1F for ; Sun, 6 Jan 2019 01:16:01 +0000 (UTC) Received: from jira-lw-us.apache.org (unknown [207.244.88.139]) by mailrelay1-us-west.apache.org (ASF Mail Server at mailrelay1-us-west.apache.org) with ESMTP id 9D401E261D for ; Sun, 6 Jan 2019 01:16:00 +0000 (UTC) Received: from jira-lw-us.apache.org (localhost [127.0.0.1]) by jira-lw-us.apache.org (ASF Mail Server at jira-lw-us.apache.org) with ESMTP id 3B63925434 for ; Sun, 6 Jan 2019 01:16:00 +0000 (UTC) Date: Sun, 6 Jan 2019 01:16:00 +0000 (UTC) From: "Christopher Tubbs (JIRA)" To: notifications@accumulo.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Resolved] (ACCUMULO-508) Multi-range input format 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/ACCUMULO-508?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Christopher Tubbs resolved ACCUMULO-508. ---------------------------------------- Resolution: Not A Problem Feature already implemented. > Multi-range input format > ------------------------ > > Key: ACCUMULO-508 > URL: https://issues.apache.org/jira/browse/ACCUMULO-508 > Project: Accumulo > Issue Type: New Feature > Components: client > Reporter: John Vines > Priority: Major > Labels: mapreduce, newbie > > Maybe for 1.4.1. > Our current input format will always apply one range (potentially split at tablet boundaries) per mapper. This is great for situations where you have a few larger ranges. However, there is a potential use case for many small ranges. Aside from the problem with a large job configuration (ACCUMULO-507), this will result in a LOT of mappers doing very little work. We should have an expanded input format which will bundle ranges together to a single mapper, ideally while trying to maintain locality. This will optimize jobs with a lot of ranges by reducing the amount of mapper overhead involved. I think very little will change with the RecordReader. The onus should still go to the end user to detect when a range change has been made (via Key change), so it will still emit Key/Value pairs, just like the regular input format. > This could possibly be extended to the whole row input format as well. -- This message was sent by Atlassian JIRA (v7.6.3#76005)