Path: csiph.com!aioe.org!news.glorb.com!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail From: Robert Klemme Newsgroups: comp.lang.java.programmer Subject: Re: lookup by EnumSet Date: Thu, 1 Mar 2012 01:22:16 -0800 (PST) Organization: http://groups.google.com Lines: 16 Message-ID: <20927599.22.1330593736666.JavaMail.geo-discussion-forums@yner4> References: <3kmpk7lno3fehkr0o21b4dqvhoijmpehbq@4ax.com> <9r51jgF5nlU2@mid.individual.net> NNTP-Posting-Host: 193.0.246.21 Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable X-Trace: posting.google.com 1330593815 23337 127.0.0.1 (1 Mar 2012 09:23:35 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Thu, 1 Mar 2012 09:23:35 +0000 (UTC) In-Reply-To: <9r51jgF5nlU2@mid.individual.net> Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=193.0.246.21; posting-account=MGO7qgoAAABvyo26eHVDO00044spH-ws User-Agent: G2/1.0 Xref: csiph.com comp.lang.java.programmer:12555 On Tuesday, February 28, 2012 11:08:47 PM UTC+1, Robert Klemme wrote: > You need a multi dimensional index which can efficiently select from any= =20 > subset of dimensions given. Whether properties are boolean or need more= =20 > than one bit to represent is just a minor challenge here. Just stumbled on this: "HyperDex employs a unique multi-dimensional hash fu= nction to enable efficient search operations =97 that is, objects may be re= trieved without using the key (PDF) under which they are stored" http://hardware.slashdot.org/story/12/02/22/1732221/is-it-time-for-nosql-20 Kind regards robert