Return-Path: X-Original-To: apmail-hbase-user-archive@www.apache.org Delivered-To: apmail-hbase-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 78858D295 for ; Fri, 19 Oct 2012 03:19:59 +0000 (UTC) Received: (qmail 73034 invoked by uid 500); 19 Oct 2012 03:19:56 -0000 Delivered-To: apmail-hbase-user-archive@hbase.apache.org Received: (qmail 72501 invoked by uid 500); 19 Oct 2012 03:19:54 -0000 Mailing-List: contact user-help@hbase.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@hbase.apache.org Delivered-To: mailing list user@hbase.apache.org Received: (qmail 72424 invoked by uid 99); 19 Oct 2012 03:19:51 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 19 Oct 2012 03:19:51 +0000 X-ASF-Spam-Status: No, hits=-0.7 required=5.0 tests=RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of saint.ack@gmail.com designates 209.85.219.41 as permitted sender) Received: from [209.85.219.41] (HELO mail-oa0-f41.google.com) (209.85.219.41) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 19 Oct 2012 03:19:43 +0000 Received: by mail-oa0-f41.google.com with SMTP id k14so26899oag.14 for ; Thu, 18 Oct 2012 20:19:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; bh=YMg+TkyBypPdFZDIvG4LGedAxag3j4pfs7JAVHR2yFY=; b=tJVfAt1kuzsYpPVpxleYjDfeQ4Ek0HvFnGA/FncpRb1koRIh/kuAwXK9oKyDnQffjj vQDiK7AQfRS1uMC+affvcf9/OxIAvgnPqLdIQkU2fKTvbdbhpDWgYuPjos1S0Kb84kE8 pw9G2XPM6j5UqPAEgFHfYm7sg3T4/AWJGL8F2oGaMoYGtJQGFVrpcnnyjdxsisSLBVnA F+Ej4Wx56jgvUFVsFDqRrIULIuGZrZCcg2n3OUfWRS5Te/y8AOzWppV9pXFCnYKPDaiN G6JoHVTpychnVzt0v65ABAh83mY9ZR6Gc7Nvi0GlPqNLvliWXAquaA41V0DgmhmqWWm4 5r8Q== MIME-Version: 1.0 Received: by 10.60.32.243 with SMTP id m19mr9837302oei.21.1350616762239; Thu, 18 Oct 2012 20:19:22 -0700 (PDT) Sender: saint.ack@gmail.com Received: by 10.76.23.35 with HTTP; Thu, 18 Oct 2012 20:19:22 -0700 (PDT) In-Reply-To: References: Date: Thu, 18 Oct 2012 20:19:22 -0700 X-Google-Sender-Auth: pw-MD42m2oZfRCv4J0rwdbYHqZU Message-ID: Subject: Re: WAL.Hlog vs. Hlog From: Stack To: user@hbase.apache.org Content-Type: text/plain; charset=ISO-8859-1 X-Virus-Checked: Checked by ClamAV on apache.org On Thu, Oct 18, 2012 at 7:35 PM, Maoke wrote: > hi Stack and all, > > i noticed that the regionserver.Hlog is obsoleted by regionserver.wal.Hlog, > from version 0.20.6 to 0.90+. what is the major difference between the two, > in principle? what we should pay attention to when using the WAL.Hlog? > Your best bet is reviewing the release notes for 0.90 and the issue that moved WAL, "HBASE-1756 Refactor HLog". Going by the issue, the motivation was cleanup. St.Ack