Return-Path: Delivered-To: apmail-hbase-user-archive@www.apache.org Received: (qmail 99948 invoked from network); 4 Apr 2011 07:02:21 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 4 Apr 2011 07:02:21 -0000 Received: (qmail 63578 invoked by uid 500); 4 Apr 2011 07:02:20 -0000 Delivered-To: apmail-hbase-user-archive@hbase.apache.org Received: (qmail 63547 invoked by uid 500); 4 Apr 2011 07:02:19 -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 63538 invoked by uid 99); 4 Apr 2011 07:02:17 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 04 Apr 2011 07:02:17 +0000 X-ASF-Spam-Status: No, hits=0.7 required=5.0 tests=RCVD_IN_DNSWL_NONE,SPF_NEUTRAL X-Spam-Check-By: apache.org Received-SPF: neutral (athena.apache.org: local policy) Received: from [195.238.6.173] (HELO mailrelay007.isp.belgacom.be) (195.238.6.173) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 04 Apr 2011 07:02:12 +0000 X-Belgacom-Dynamic: yes X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AogCAEhsmU1bsktY/2dsb2JhbAAMmE7NYoVrBJMs Received: from 88.75-178-91.adsl-dyn.isp.belgacom.be (HELO [192.168.1.4]) ([91.178.75.88]) by relay.skynet.be with ESMTP; 04 Apr 2011 09:01:50 +0200 Message-ID: <4D996CDC.9050204@u-mangate.com> Date: Mon, 04 Apr 2011 09:01:48 +0200 From: Eric Charles User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.15) Gecko/20110303 Thunderbird/3.1.9 MIME-Version: 1.0 To: user@hbase.apache.org Subject: Re: Why HTableDescriptor DEFAULT_VERSIONS is 3? References: <4D996A10.6080509@u-mangate.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Good to me as "de-facto" standard. People should simply know that they will have 3 versions by default when inserting data in hbase. Tks, - Eric On 4/04/2011 08:52, Ryan Rawson wrote: > because it always has been? I think the original BT paper probably > had the number '3' in there somewhere... > > But yes, not too big, not too small. There probably isnt a reasonable > setting here, I'm guessing 1 isnt quite right either. > > Its one aspect of your data modelling, so people should probably be > setting this value on larger tables. > > -ryan > > On Sun, Apr 3, 2011 at 11:49 PM, Eric Charles > wrote: >> Hi, >> >> Is there a particular reason to have chosen 3 for >> HTableDescriptor.DEFAULT_VERSIONS? >> ("not too low, not too big"? - I didn't find discussions about this). >> >> Tks, >> - Eric >>