A Monday 07 April 2008, Roland Schwarz escrigué:
What happened to Fast-Query API?
Is there anyone on the list who knows more?
As fas as I know, FastQuery was an implementation of FastBit algorithms
(based on bitmaps) on top of HDF5. Unfortunately, it seems that they
never released something publicly in a formal way. Right now, it seems
to me that FastBit is using a pretty simple format to keep indexes that
doesn't need HDF5 (nor any other standard format).
Here's the URL for FastBit: FastBit: An Efficient Compressed Bitmap Index Technology
Are there alternatives to Fast-Query available?
It depends on what kind of indexing are you after. In [1]_ you can see
another bitmap implementation, but I've never tried it (>300 MB of tar
file looks somewhat scary to my eyes). This seems a prototype anyway...[1] http://www.hdfgroup.uiuc.edu/RFC/HDF5/hdf5Indexing/bitmaps.html
In [2]_ there is our own implementation on top of HDF5 that is based on
OPSI (Optimized Partially Sorted Indexes) technology. This one is for
the Python language only, though...[2] http://www.carabos.com/products/pytables-pro
Also, Quincey said in this very same list that The HDF Group does have
some funding to implement "production level" indexing features within
the HDF5 distribution. Perhaps he can provide more details about this.
We do have some funding to work on some indexing support within the HDF5 distribution. We're pretty early on this right now though, so I'll send more information as we get further along.
Quincey
···
On Apr 7, 2008, at 10:15 AM, Francesc Altet wrote:
Hope it helps,
--
0,0< Francesc Altet http://www.carabos.com/
V V Cárabos Coop. V. Enjoy Data
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