updates

* added figures showing benchmarks for parallel processing
* added creative-commons license
* updated README accordingly

Author: nschorgh

LICENSE-CC-BY-NC.TXT

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Parallel/parallel-filter-times-HDD.pdf

@@ -1,39 +1,38 @@
-Utilities for High-Throughput PDS Data Processing
-=================================================
+High-Throughput PDS Data Processing
+===================================
 
 *by Norbert Schorghofer*
 
+Throughput benchmarks for various lossless compression formats applied to a data set from the PDS (Planetary Data System)
 
-These are the first components of a collection of utitilies for high-throughput processing of data from the PDS (Planetary Data System).
-
-Formats:  
-* Diviner RDR level-1 files
 
+### Throughput Studies
 
+Input files for case study:  
+* Diviner RDR level-1 files in zip format  
 
+Benchmarked output formats:
+* zip, gzip, lzma, lz4, br, zstd, and others  
 
-### Throughput Studies
 
 `prepfiles.cmd`  creates files of various compression formats using default level  
 `prepfiles_other.cmd`  creates files of various compression formats using non-default levels  
 
+`timecompress.cmd`  measures times for file compression  
+`compress1-benchmark.pdf` plot of compression ratio versus compression time  
+
 `timedecompress1.cmd`  measures times for file decompression  
 `timedecompress1_stdout.cmd`  measures times for file decompression via stdout  
-`timecompress.cmd`  measures times for file compression  
+`decompress1-benchmark.pdf` plot of compression ratio versus decompression time (main result)  
 
 `Parallel/timeparallelfilter.cmd`  measures times for parallel file decompresson and filtering  
 `Parallel/timefilter1.cmd`  measures times for individual calls of `filter1_*.cmd`  
 `Parallel/filter1_*.cmd`  shell scripts called by `./time*.cmd`  
-
-
-### Throughput Tools
-
-To be developed.
-
+`Parallel/parallel-filter-times-*.pdf`  plots showing results for scaling with number of threads  
 
 ---
 
 ### Acknowledgments
 
-This study is supported by NASA's Lunar Data Analysis Program.
+This study was supported by NASA's Lunar Data Analysis Program.