From general-return-2853-apmail-hadoop-general-archive=hadoop.apache.org@hadoop.apache.org Wed Jan 19 22:01:03 2011 Return-Path: Delivered-To: apmail-hadoop-general-archive@minotaur.apache.org Received: (qmail 10844 invoked from network); 19 Jan 2011 22:01:02 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 19 Jan 2011 22:01:02 -0000 Received: (qmail 36293 invoked by uid 500); 19 Jan 2011 22:00:59 -0000 Delivered-To: apmail-hadoop-general-archive@hadoop.apache.org Received: (qmail 35864 invoked by uid 500); 19 Jan 2011 22:00:57 -0000 Mailing-List: contact general-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: general@hadoop.apache.org Delivered-To: mailing list general@hadoop.apache.org Received: (qmail 35852 invoked by uid 99); 19 Jan 2011 22:00:57 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 19 Jan 2011 22:00:57 +0000 X-ASF-Spam-Status: No, hits=-0.7 required=10.0 tests=FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of saint.ack@gmail.com designates 74.125.83.48 as permitted sender) Received: from [74.125.83.48] (HELO mail-gw0-f48.google.com) (74.125.83.48) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 19 Jan 2011 22:00:51 +0000 Received: by gwj15 with SMTP id 15so616636gwj.35 for ; Wed, 19 Jan 2011 14:00:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:date:x-google-sender-auth :message-id:subject:from:to:content-type; bh=vv+AQ8zLODFfJmULgqQ57xC6CrrC8yYNxK8Cm0l5yUM=; b=FwXuNC7/RUsl0LetwqYQ4xI4dE76zRWM1krBrirrLqKRiuQ1wTxI2CeIWnR1Tt/cyL fsWXsPYUSNRODZZm4lvNc0pa7I+QV5ShdTBw1ITRH89PPnjh++3xFHxeBCu1dhCt+/S1 AOBwdCEo9s89vOe3BmMk38OwHdfVS3+yj+rqw= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:date:x-google-sender-auth:message-id:subject :from:to:content-type; b=a5QMNQZlROpVbBM87Oqb38gYEFJ4zoBmxrX+w6L3b4IVvD+FD1kegKwKKVZnifj7AW CWsgxOHbR1tWwzmEWLdRcbCvXw7mK6+AkJ+/wpgCHFB6E7Pp/IB0kirvo3QV0iSeu7Vg i1BxVeds+NLz2/IRD2qgxKAt/gQc6VP8LEieQ= MIME-Version: 1.0 Received: by 10.216.48.5 with SMTP id u5mr1128762web.96.1295474429825; Wed, 19 Jan 2011 14:00:29 -0800 (PST) Sender: saint.ack@gmail.com Received: by 10.216.49.11 with HTTP; Wed, 19 Jan 2011 14:00:29 -0800 (PST) Date: Wed, 19 Jan 2011 14:00:29 -0800 X-Google-Sender-Auth: Huowu4lr_xMEnACevqc6kF85R94 Message-ID: Subject: ANN: HBase 0.90.0 available for download From: Stack To: general@hadoop.apache.org, user@hbase.apache.org Content-Type: text/plain; charset=ISO-8859-1 X-Virus-Checked: Checked by ClamAV on apache.org The HBase crew are pleased to announce the availability of 0.90.0. You can download it here: http://www.apache.org/dyn/closer.cgi/hbase/ HBase 0.90.0 is the major HBase release to follow HBase-0.20.x and the fruit of the 0.89.x development release series we've been running over the last few months. Over 1k issues have been closed since 0.20.0. Release notes are available here: http://su.pr/8LbgvK. Highlights include new master, inter-cluster replication, data durability, improved performance, improved i/o profile, etc. We recommend all upgrade to this release but ONLY after a close reading of requirements [1]. In particular, see the section on Hadoop where we talk about the Hadoop versions and HBase 0.90.0. There is no migration necessary. Your data written with HBase 0.20.x (or with HBase 0.89.x) is readable by HBase 0.90.0. A shutdown and restart after putting in place the new HBase should be all thats involved. That said, once done, there is no (easy) going back to 0.20.x once the transition has been made. HBase 0.90.0 and HBase 0.89.x write region names differently in the filesystem. Rolling restart from 0.20.x or 0.89.x to 0.90.0RC1 will not work. A big thanks goes out to all who contributed to this release. Yours, The HBasistas P.S. For why the version 0.90 and whats new in HBase 0.90, see slides 4-10 in this deck, [2]. 1. http://hbase.apache.org/notsoquick.html#requirements 2. http://hbaseblog.com/2010/07/04/hug11-hbase-0-90-preview-wrap-up/