[hdf-forum] speeding up h5repack

[Brock Palen]

Is there any tweaks that can be done to speed up compressing already  
created hdf5 files?

For example

h5repack -v -i rt_3d_71nm_5micron_hdf5_plt_cnt_0010 -o  
lt_cnt_0010_zipped -f GZIP=1

Takes 129 Minutes

While:
gzip rt_3d_71nm_5micron_hdf5_plt_cnt_0010

Takes 1.5 Minutes

hdf5-1.6.7

We don't have szip enabled, but would be interested in trying  
(academic work so licensing should not be a problem).

Just seemed strange that it took so long,  the uncompressed hdf5 file  
is from FLASH2.5.

Any insight would be nice.



Brock Palen
www.umich.edu/~brockp
Center for Advanced Computing
brockp at umich.edu
(734)936-1985




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