Similar to SEP3D (), the master file is still the standard
SEP history file. The difference is that the history file
will not have a pointer to the dataset (in=) and it
will have an additional pointer to a text file (Distribution
Format File (DFF)) describing
the distribution pattern (dff=).
The distribution format file is made up of several parameters:
The final set of files are the various tag_sect. Each tag_sect is
a valid SEP3D dataset.
- The number of sections the dataset is broken up into.
- The axis along which the data is distributed.
- The length of the axis that the data is distributed along.
- The distribution pattern along the distributed axis.
Right now two distribution patterns are defined, BLOCK and SPREAD.
In the first option sequential elements along the first axis will belong
to the same section. In the second option a given section will contain
elements isect+k*nsect where isect is the section number,
nsect is the number of sections, and k is the number of axis
elements the section owns. One obvious future extension to the library is to
handle more arbitrary distribution patterns.
- The tag associated with section number i.
- The machine in which section i was written.
Stanford Exploration Project