[ET Trac] [Einstein Toolkit] #1031: write index files for checkpoints

[Einstein Toolkit]

#1031: write index files for checkpoints
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 Reporter:  rhaas         |       Owner:  eschnett
     Type:  enhancement   |      Status:  new     
 Priority:  minor         |   Milestone:          
Component:  Carpet        |     Version:          
 Keywords:  CarpetIOHDF5  |  
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 this patch writes index files for checkpoints if output_index is set. This
 is (only) useful if the checkpoints will be read in by a different number
 of processes than written. In that case, parsing the index files is faster
 than parsing the heavy data files.

 The two patches provide read and write functionality. The attached C code
 creates index files from existing HDF5 files (not necessary checkpoints).
 It is a modified copy of hdf5_extract from the HDF5 thorn.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1031>
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