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 9B882105F6 for ; Wed, 13 Nov 2013 02:43:19 +0000 (UTC) Received: (qmail 93034 invoked by uid 500); 13 Nov 2013 02:43:19 -0000 Delivered-To: apmail-hbase-issues-archive@hbase.apache.org Received: (qmail 92948 invoked by uid 500); 13 Nov 2013 02:43:19 -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 92939 invoked by uid 99); 13 Nov 2013 02:43:19 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 13 Nov 2013 02:43:19 +0000 Date: Wed, 13 Nov 2013 02:43:19 +0000 (UTC) From: "Enis Soztutar (JIRA)" To: issues@hbase.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HBASE-8369) MapReduce over snapshot files 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-8369?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Enis Soztutar updated HBASE-8369: --------------------------------- Attachment: hbase-8369_v8.patch Patch from RB. > MapReduce over snapshot files > ----------------------------- > > Key: HBASE-8369 > URL: https://issues.apache.org/jira/browse/HBASE-8369 > Project: HBase > Issue Type: New Feature > Components: mapreduce, snapshots > Reporter: Enis Soztutar > Assignee: Enis Soztutar > Fix For: 0.98.0 > > Attachments: HBASE-8369-0.94.patch, HBASE-8369-0.94_v2.patch, HBASE-8369-0.94_v3.patch, HBASE-8369-0.94_v4.patch, HBASE-8369-0.94_v5.patch, HBASE-8369-trunk_v1.patch, HBASE-8369-trunk_v2.patch, HBASE-8369-trunk_v3.patch, hbase-8369_v0.patch, hbase-8369_v5.patch, hbase-8369_v6.patch, hbase-8369_v7.patch, hbase-8369_v8.patch > > > The idea is to add an InputFormat, which can run the mapreduce job over snapshot files directly bypassing hbase server layer. The IF is similar in usage to TableInputFormat, taking a Scan object from the user, but instead of running from an online table, it runs from a table snapshot. We do one split per region in the snapshot, and open an HRegion inside the RecordReader. A RegionScanner is used internally for doing the scan without any HRegionServer bits. > Users have been asking and searching for ways to run MR jobs by reading directly from hfiles, so this allows new use cases if reading from stale data is ok: > - Take snapshots periodically, and run MR jobs only on snapshots. > - Export snapshots to remote hdfs cluster, run the MR jobs at that cluster without HBase cluster. > - (Future use case) Combine snapshot data with online hbase data: Scan from yesterday's snapshot, but read today's data from online hbase cluster. -- This message was sent by Atlassian JIRA (v6.1#6144)