From issues-return-331394-archive-asf-public=cust-asf.ponee.io@hbase.apache.org Tue Jan 30 03:19:05 2018 Return-Path: X-Original-To: archive-asf-public@eu.ponee.io Delivered-To: archive-asf-public@eu.ponee.io Received: from cust-asf.ponee.io (cust-asf.ponee.io [163.172.22.183]) by mx-eu-01.ponee.io (Postfix) with ESMTP id ED1C2180654 for ; Tue, 30 Jan 2018 03:19:04 +0100 (CET) Received: by cust-asf.ponee.io (Postfix) id DCDB2160C53; Tue, 30 Jan 2018 02:19:04 +0000 (UTC) Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by cust-asf.ponee.io (Postfix) with SMTP id 301C9160C3F for ; Tue, 30 Jan 2018 03:19:04 +0100 (CET) Received: (qmail 97418 invoked by uid 500); 30 Jan 2018 02:19:03 -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 97406 invoked by uid 99); 30 Jan 2018 02:19:03 -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; Tue, 30 Jan 2018 02:19:03 +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 B5B06CF108 for ; Tue, 30 Jan 2018 02:19:02 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd1-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -109.511 X-Spam-Level: X-Spam-Status: No, score=-109.511 tagged_above=-999 required=6.31 tests=[ENV_AND_HDR_SPF_MATCH=-0.5, KAM_ASCII_DIVIDERS=0.8, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_SPF_WL=-7.5, USER_IN_WHITELIST=-100] autolearn=disabled Received: from mx1-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 ubhZ-VlAmRkC for ; Tue, 30 Jan 2018 02:19:02 +0000 (UTC) Received: from mailrelay1-us-west.apache.org (mailrelay1-us-west.apache.org [209.188.14.139]) by mx1-lw-us.apache.org (ASF Mail Server at mx1-lw-us.apache.org) with ESMTP id EC87260D52 for ; Tue, 30 Jan 2018 02:19:01 +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 31058E0218 for ; Tue, 30 Jan 2018 02:19:01 +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 5BC4A2411F for ; Tue, 30 Jan 2018 02:19:00 +0000 (UTC) Date: Tue, 30 Jan 2018 02:19:00 +0000 (UTC) From: "Josh Elser (JIRA)" To: issues@hbase.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HBASE-17852) Add Fault tolerance to HBASE-14417 (Support bulk loaded files in incremental backup) 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-17852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16344407#comment-16344407 ] Josh Elser commented on HBASE-17852: ------------------------------------ Also, again, if you want this reverted, please say so. > Add Fault tolerance to HBASE-14417 (Support bulk loaded files in incremental backup) > ------------------------------------------------------------------------------------ > > Key: HBASE-17852 > URL: https://issues.apache.org/jira/browse/HBASE-17852 > Project: HBase > Issue Type: Sub-task > Reporter: Vladimir Rodionov > Assignee: Vladimir Rodionov > Priority: Major > Fix For: 3.0.0 > > Attachments: HBASE-17852-v10.patch, screenshot-1.png > > > Design approach rollback-via-snapshot implemented in this ticket: > # Before backup create/delete/merge starts we take a snapshot of the backup meta-table (backup system table). This procedure is lightweight because meta table is small, usually should fit a single region. > # When operation fails on a server side, we handle this failure by cleaning up partial data in backup destination, followed by restoring backup meta-table from a snapshot. > # When operation fails on a client side (abnormal termination, for example), next time user will try create/merge/delete he(she) will see error message, that system is in inconsistent state and repair is required, he(she) will need to run backup repair tool. > # To avoid multiple writers to the backup system table (backup client and BackupObserver's) we introduce small table ONLY to keep listing of bulk loaded files. All backup observers will work only with this new tables. The reason: in case of a failure during backup create/delete/merge/restore, when system performs automatic rollback, some data written by backup observers during failed operation may be lost. This is what we try to avoid. > # Second table keeps only bulk load related references. We do not care about consistency of this table, because bulk load is idempotent operation and can be repeated after failure. Partially written data in second table does not affect on BackupHFileCleaner plugin, because this data (list of bulk loaded files) correspond to a files which have not been loaded yet successfully and, hence - are not visible to the system -- This message was sent by Atlassian JIRA (v7.6.3#76005)