Hello
Im have a hdf5, filled with some fill values, that is compressed.
Now I need to had slices of information to this hdf5 files.
For this I used hyperslab and it works.
My problem is that when I write the first slice it seems to keep the
original compression but when I write the second slice it loses
compression.
A file that should have around 127 Mb has 193 Mb, below is the code that Im
using:
NumType = H5T_NATIVE_DOUBLE
!Opens the Group
call h5gopen_f (Me%FileID, GroupName, gr_id, STAT_CALL)
if (STAT_CALL /= SUCCESS_) stop 'HDF5WriteWindowR8_2D - ModuleHDF5 - ERR10'
!Opens the DataSet
if (present(OutputNumber)) then
call ConstructDSName (Name, OutputNumber, AuxChar)
else
AuxChar = Name
endif
!Opens the Dataset
call h5dopen_f (gr_id, trim(adjustl(AuxChar)), dset_id, STAT_CALL)
if (STAT_CALL /= SUCCESS_) stop 'HDF5WriteWindowR8_2D - ModuleHDF5 - ERR20'
!Gets the data type id
call h5dget_type_f (dset_id, datatype_id, STAT_CALL)
if (STAT_CALL /= SUCCESS_) stop 'HDF5WriteWindowR8_2D - ModuleHDF5 - ERR30'
call h5tget_class_f(datatype_id, class_id, STAT_CALL)
if (STAT_CALL /= SUCCESS_) stop 'HDF5WriteWindowR8_2D - ModuleHDF5 - ERR40'
!Gets a handle of the dataspace
call h5dget_space_f (dset_id, space_id, STAT_CALL)
if (STAT_CALL /= SUCCESS_) stop 'HDF5WriteWindowR8_2D - ModuleHDF5 - ERR50'
!Gets the rank
call h5sget_simple_extent_ndims_f (space_id, rank, STAT_CALL)
if (STAT_CALL /= SUCCESS_) stop 'HDF5WriteWindowR8_2D - ModuleHDF5 - ERR60'
!Gets the size
call h5sget_simple_extent_dims_f (space_id, dims, maxdims, STAT_CALL)
if (STAT_CALL < SUCCESS_) stop 'HDF5WriteWindowR8_2D - ModuleHDF5 - ERR70'
lower_bound(:) = FillValueInt
upper_bound(:) = FillValueInt
lower_bound(1) = Me%Limits%ILB
upper_bound(1) = Me%Limits%IUB
if (rank >=2) then
lower_bound(2) = Me%Limits%JLB
upper_bound(2) = Me%Limits%JUB
endif
if (rank >=3) then
lower_bound(3) = Me%Limits%KLB
upper_bound(3) = Me%Limits%KUB
endif
allocate (offset_in (rank))
allocate (count_in (rank))
if (present(OffSet1)) then
offset_in(1) = OffSet1
else
offset_in(1) = lower_bound(1) - 1
endif
if (Rank >=2) then
if (present(OffSet2)) then
offset_in(2) = OffSet2
else
offset_in(2) = lower_bound(2) - 1
endif
endif
if (Rank >=3) then
stop 'HDF5WriteWindowR8_2D - ModuleHDF5 - ERR80'
endif
count_in (1:rank) = upper_bound(1:rank) - lower_bound(1:rank) + 1
!Defines the hyperslab in the dataset
call h5sselect_hyperslab_f (space_id, H5S_SELECT_SET_F, offset_in,
count_in, STAT_CALL)
if (STAT_CALL /= SUCCESS_) stop 'HDF5WriteWindowR8_2D - ModuleHDF5 - ERR90'
!Defines the memory dataspace
dims_mem(1) = upper_bound(1)-lower_bound(1) + 1
dims_mem(2) = upper_bound(2)-lower_bound(2) + 1
call h5screate_simple_f (rank, dims_mem, memspace_id, STAT_CALL)
if (STAT_CALL /= SUCCESS_) stop 'HDF5WriteWindowR8_2D - ModuleHDF5 - ERR100'
call h5dwrite_f (dset_id, NumType, Array2D, dims_mem, STAT_CALL,
memspace_id, space_id)
if (STAT_CALL /= SUCCESS_) stop 'HDF5WriteWindowR8_2D - ModuleHDF5 - ERR110'
!Deallocates temporary matrixes
deallocate (offset_in )
deallocate (count_in )
!Closes data space
call h5sclose_f (space_id, STAT_CALL)
if (STAT_CALL /= SUCCESS_) stop 'HDF5WriteWindowR8_2D - ModuleHDF5 - ERR120'
!End access to the dataset
call h5dclose_f (dset_id, STAT_CALL)
if (STAT_CALL /= SUCCESS_) stop 'HDF5WriteWindowR8_2D - ModuleHDF5 - ERR130'
!Closes group
call h5gclose_f (gr_id, STAT_CALL)
if (STAT_CALL /= SUCCESS_) stop 'HDF5WriteWindowR8_2D - ModuleHDF5 - ERR140'
How can I keep the compression in the final hdf5 file?
Regards
João Ribeiro
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