Re: swarm and database

[david ROBIN]

Hi Alex,
thanks for answering so quickly.
i will check this right now!
David
--- Alex Lancaster <address@hidden> a écrit:
> >>>>> "DR" == david ROBIN <address@hidden>
> writes:
> 
> DR> Hi,i am using swarm in java under NT and i want
> to know if it is
> DR> possible to get initialisations parameters from
> a database,
> DR> instead of a ".scm" file.
> 
> David,
> 
> The HDF5 serialization backend for Swarm is a
> "database" oriented
> solution.  HDF5 saves information in a binary
> compressed form, which
> can be accessed in a random-access fashion (i.e. 
> you give the
> database a "key" and you have efficient hash-table
> look-up).
> 
> The advantages are:
> 
> 1) Swarm supports HDF5 directly (i.e. you save
> objects with the same
> API as you do for Scheme files) via the "Archiver"
> protocol (you set a
> flag to use HDF5 when you create the "Archiver"
> object).
> 
> 2) R (a free S-Plus like clone statistics package)
> has been enhanced
> (by Marcus) to read HDF5 files directly.
> 
> HDF5 is particularly useful when you have large
> homogeneous data sets
> (like big vectors) which don't need to be
> human-readable and/or for
> objects that are relatively "flat" (i.e. don't
> contain
> many objects-with-objects).
> 
> Links to R and HDF5 can be found at:
> 
> 
>
http://www.santafe.edu/projects/swarm/release-apps.html#support
> 
> There are a number of bits of example code that
> Marcus has posted to
> Swarm Support in the past.  Do a search on the
> archive with the
> keyword "HDF5".
> 
> If you want to use an SQL database (like MySQL
> [free] or Oracle
> [commercial]) you could go ahead and write an
> interface, there's
> nothing in principle with Swarm that makes this
> impossible, and it
> would be someday nice to have such a beast, but it's
> probably not a
> high-priority right now.
> 
> Hope this helps.
> 
>  --- Alex 
> 
> -- 
> Alex Lancaster * address@hidden *
> www.santafe.edu/~alex * 505 984-8800 x242
> Santa Fe Institute (www.santafe.edu) & Swarm
> Development Group (www.swarm.org)
> 
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   Swarm-Support is for discussion of the technical details of the day
   to day usage of Swarm.  For list administration needs (esp.
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   with "help" in the body of the message.