mirror of
https://github.com/TREX-CoE/trexio.git
synced 2024-07-22 18:57:39 +02:00
23 lines
755 B
Org Mode
23 lines
755 B
Org Mode
See templator_front.org
|
|
|
|
* Text back end
|
|
As the size of the dataset should be extensible, the simplest
|
|
solution is to use one file for each sparse data set, and store a
|
|
the name of this file in the group.
|
|
Each integral can be a line in the file:
|
|
i j k l x
|
|
which can be read with "%10ld %10ld %10ld %10ld %24.16e".
|
|
The offset can be used with ~fseek(69L*offset, SEEK_SET)~
|
|
|
|
* HDF5 Back end
|
|
|
|
We need to declare the number of rows of the dataset as ~UNLIMITED~. This requires to use the ~Chunked~ storage, and the
|
|
chunks should absolutely not be larger than 1MB.
|
|
|
|
To extend the storage, see :
|
|
https://support.hdfgroup.org/HDF5/doc1.6/UG/10_Datasets.html
|
|
(figure 17)
|
|
|
|
If the offset+num > nmax, we need to extend the dataset.
|