Return-Path: Delivered-To: apmail-hbase-user-archive@www.apache.org Received: (qmail 76871 invoked from network); 4 Apr 2011 16:32:54 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 4 Apr 2011 16:32:54 -0000 Received: (qmail 63744 invoked by uid 500); 4 Apr 2011 16:32:53 -0000 Delivered-To: apmail-hbase-user-archive@hbase.apache.org Received: (qmail 63710 invoked by uid 500); 4 Apr 2011 16:32:53 -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 63699 invoked by uid 99); 4 Apr 2011 16:32:53 -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 16:32:53 +0000 X-ASF-Spam-Status: No, hits=-0.7 required=5.0 tests=FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of joe.pallas@gmail.com designates 209.85.218.41 as permitted sender) Received: from [209.85.218.41] (HELO mail-yi0-f41.google.com) (209.85.218.41) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 04 Apr 2011 16:32:45 +0000 Received: by yib18 with SMTP id 18so2968773yib.14 for ; Mon, 04 Apr 2011 09:32:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:sender:content-type:mime-version:subject:from :in-reply-to:date:content-transfer-encoding:message-id:references:to :x-mailer; bh=7f4W4V2Ux/QvYNoWqiFv9CejAnXqH88wVMybX6pXUAM=; b=ilDde4dmYbraRkj2O7PpT+grZfGEiAGxHNEKXQVcUJ4ms79y4Wz/bLEK/GkoaZcOuy mNmeRQFiCm0TKcuL15ssNcV3morKXfUKcbP0lRwRyEvp104pgS2/n1q+w2FLVbhqQi2h wmlNjazcUXQ3lODoGEnEvZJOxlBhouD5xIIqw= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=sender:content-type:mime-version:subject:from:in-reply-to:date :content-transfer-encoding:message-id:references:to:x-mailer; b=cPPYNCDSzE96Q5iLMRlWunFPcgMtBJRDBQ/+rvZ5HYeXmryyJi8Dc4k2lsGCXGEbM/ iCIfh/U7VxJxTdHFpDhNT5cEFSucHwNO4oJ3jUHJMgGBYtry4c3eAOFiqaflXcFfmUia 9/OfIhUWyWUoZAVsqVxJNtjvrrZOHWsbD1xts= Received: by 10.236.174.37 with SMTP id w25mr10547839yhl.207.1301934744791; Mon, 04 Apr 2011 09:32:24 -0700 (PDT) Received: from [127.0.0.1] (inet-bc01-o.oracle.com [148.87.1.167]) by mx.google.com with ESMTPS id l27sm1243631yhn.5.2011.04.04.09.32.22 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 04 Apr 2011 09:32:23 -0700 (PDT) Sender: Joe Pallas Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Apple Message framework v1084) Subject: Re: Why HTableDescriptor DEFAULT_VERSIONS is 3? From: Joe Pallas In-Reply-To: Date: Mon, 4 Apr 2011 09:31:50 -0700 Content-Transfer-Encoding: quoted-printable Message-Id: <85914610-82E9-4CA9-AA82-3EE71DD96A4C@cs.stanford.edu> References: <4D996A10.6080509@u-mangate.com> To: user@hbase.apache.org X-Mailer: Apple Mail (2.1084) On Apr 3, 2011, at 11:52 PM, Ryan Rawson wrote: > because it always has been? I think the original BT paper probably > had the number '3' in there somewhere... >=20 > But yes, not too big, not too small. There probably isnt a reasonable > setting here, I'm guessing 1 isnt quite right either. Why? Why shouldn't 1 be the default? If you don't have an explicit use = case for more than one version, which I would wager many people don't, = what is the point of it? joe PS Yes, the Google paper has the number 3 in it somewhere: in the = web-crawling example. Since it was just one example, it doesn't make a = very good basis for a system-wide default.