From cstrato at aon.at  Thu Feb 14 19:36:46 2008
From: cstrato at aon.at (cstrato)
Date: Thu, 14 Feb 2008 19:36:46 +0100
Subject: [Rd]  Vector binding on harddisk
References: 47B469C9.2040505@stats.uwo.ca
Message-ID: <47B48A3E.1010606@aon.at>

Dear Henrik

Please allow me to add also my opinion:
Databases may be the most straightforward way to expand, but in my 
opinion there is a better solution, which was developed for high energy 
physics, where people need to work with huge amounts of data including 
very large vectors.

The solution is called ROOT (see: http://root.cern.ch/), especially 
objects, called TTree, were developed for this purpose. A TTree loads 
only a defined subset into memory, but given enough space can be stored 
completely in memory (see: http://root.cern.ch/root/html/TTree.html).

Thus, ROOT is exactly the framework, from which you say: "it is hard to 
beat a framework that stores (contiguous) data that is optimized for 
reading and/or writing".

Best regards
Christian
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C.h.i.s.t.i.a.n S.t.r.a.t.o.w.a
V.i.e.n.n.a       A.u.s.t.r.i.a
e.m.a.i.l:    cstrato at aon.at
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[Rd] Vector binding on harddisk
cstrato