Return-Path: X-Original-To: apmail-accumulo-notifications-archive@minotaur.apache.org Delivered-To: apmail-accumulo-notifications-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id B87DF10B6E for ; Tue, 25 Mar 2014 14:19:22 +0000 (UTC) Received: (qmail 90002 invoked by uid 500); 25 Mar 2014 14:19:22 -0000 Delivered-To: apmail-accumulo-notifications-archive@accumulo.apache.org Received: (qmail 89899 invoked by uid 500); 25 Mar 2014 14:19:17 -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 89852 invoked by uid 99); 25 Mar 2014 14:19:15 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 25 Mar 2014 14:19:15 +0000 Date: Tue, 25 Mar 2014 14:19:14 +0000 (UTC) From: "Eric Newton (JIRA)" To: notifications@accumulo.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (ACCUMULO-1218) document the recovery from a failed zookeeper 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-1218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13946586#comment-13946586 ] Eric Newton commented on ACCUMULO-1218: --------------------------------------- [~elserj] you can also get data back that had been compacted out. Let's say we have a table in a single tablet that contains rows [a, b, d... x, y, z]. The tablet splits to (-inf, m] and (m, +inf). Both tablets use the file that contains [a...z]. Now I delete row a with a bunch of delete markers. The table contains [b, c, ... z]. I compact (-inf, m]. So I have [b...m] and [n...z] in separate tablets. But remember, row a still lives in a file pointed to by (m, +inf). If zookeeper dies, and I re-import files. Row a will return. > document the recovery from a failed zookeeper > --------------------------------------------- > > Key: ACCUMULO-1218 > URL: https://issues.apache.org/jira/browse/ACCUMULO-1218 > Project: Accumulo > Issue Type: Sub-task > Components: docs > Reporter: Eric Newton > Assignee: Josh Elser > Labels: Documentation > Fix For: 1.6.0 > > Attachments: 0001-ACCUMULO-1218-Overview-on-how-to-recover-an-instance.patch > > > Document bulk-import based recovery of accumulo. > Include a stern warning and possible data loss and unwanted data recovery. -- This message was sent by Atlassian JIRA (v6.2#6252)