[pytables-users] Dense HDF5 attribute storing with PyTables

[Robert Meyer]

Hey everyone,

since version1.8.8, HDF5 offers dense storage of attributes
<http://www.hdfgroup.org/HDF5/doc/UG/UG_frame13Attributes.html>
for faster handling of HDF5 nodes with many or large attributes.
By default the limit (H5Pset_attr_phase_change) to start dense storage is
set to 8 attributes.

Is there any way how can change this to 0 via PyTables, so that attributes
are *always* stored in dense mode?

Thanks!


Cheers,

Robert

[Antonio Valentino]

Hi Robert,

Post by Robert Meyer
Hey everyone,
since version1.8.8, HDF5 offers dense storage of attributes
<http://www.hdfgroup.org/HDF5/doc/UG/UG_frame13Attributes.html>
for faster handling of HDF5 nodes with many or large attributes.
By default the limit (H5Pset_attr_phase_change) to start dense storage is
set to 8 attributes.
Is there any way how can change this to 0 via PyTables, so that attributes
are *always* stored in dense mode?

Not currently, sorry.
A patch that implements it is welcome.


cheers

[Robert Meyer]

Hey,

thanks for the quick answer. Do you have any hints on how to tackle this in
PyTables?
h5py has a rather comprehensive documentation how to handle cases like this:
http://docs.h5py.org/en/latest/contributing.html#how-to-modify-h5py

Cheers,
Robert

Post by Antonio Valentino
Hi Robert,

Post by Robert Meyer
Hey everyone,
since version1.8.8, HDF5 offers dense storage of attributes
<http://www.hdfgroup.org/HDF5/doc/UG/UG_frame13Attributes.html>
for faster handling of HDF5 nodes with many or large attributes.
By default the limit (H5Pset_attr_phase_change) to start dense storage

is

Post by Robert Meyer
set to 8 attributes.
Is there any way how can change this to 0 via PyTables, so that

attributes

Post by Robert Meyer
are *always* stored in dense mode?

Not currently, sorry.
A patch that implements it is welcome.
cheers
--
Antonio Valentino