Return-Path: X-Original-To: archive-asf-public-internal@cust-asf2.ponee.io Delivered-To: archive-asf-public-internal@cust-asf2.ponee.io Received: from cust-asf.ponee.io (cust-asf.ponee.io [163.172.22.183]) by cust-asf2.ponee.io (Postfix) with ESMTP id 950FE200C07 for ; Sun, 22 Jan 2017 10:52:35 +0100 (CET) Received: by cust-asf.ponee.io (Postfix) id 8F52B160B45; Sun, 22 Jan 2017 09:52:35 +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 DA525160B38 for ; Sun, 22 Jan 2017 10:52:34 +0100 (CET) Received: (qmail 60836 invoked by uid 500); 22 Jan 2017 09:52:34 -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 60821 invoked by uid 99); 22 Jan 2017 09:52:33 -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, 22 Jan 2017 09:52:33 +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 8AFB7C0572 for ; Sun, 22 Jan 2017 09:52:33 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd1-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -1.199 X-Spam-Level: X-Spam-Status: No, score=-1.199 tagged_above=-999 required=6.31 tests=[KAM_ASCII_DIVIDERS=0.8, KAM_LAZY_DOMAIN_SECURITY=1, RP_MATCHES_RCVD=-2.999] 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 zuIjzFg8vHYA for ; Sun, 22 Jan 2017 09:52:33 +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 588B55F4AC for ; Sun, 22 Jan 2017 09:52:32 +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 DBB1CE0321 for ; Sun, 22 Jan 2017 09:52:26 +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 61DA625285 for ; Sun, 22 Jan 2017 09:52:26 +0000 (UTC) Date: Sun, 22 Jan 2017 09:52:26 +0000 (UTC) From: "Yu Li (JIRA)" To: issues@hbase.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HBASE-17507) Add document for the mvcc preassign feature introduced in HBASE-16698 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 archived-at: Sun, 22 Jan 2017 09:52:35 -0000 [ https://issues.apache.org/jira/browse/HBASE-17507?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15833430#comment-15833430 ] Yu Li commented on HBASE-17507: ------------------------------- bq. what if the order of mvcc differs from the order of wal? A {{preAssignMvccLock}} was introduced and made {{mvcc.begin}} and {{WAL.append}} a transaction, so this won't happen. > Add document for the mvcc preassign feature introduced in HBASE-16698 > --------------------------------------------------------------------- > > Key: HBASE-17507 > URL: https://issues.apache.org/jira/browse/HBASE-17507 > Project: HBase > Issue Type: Task > Reporter: Yu Li > Assignee: Yu Li > > In this JIRA we will supply a design doc of the mvcc preassign mechanism introduced in HBASE-16698, as well as more detailed performance data of it for better reference. -- This message was sent by Atlassian JIRA (v6.3.4#6332)