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usage: h5repack [OPTIONS] file1 file2
file1 Input HDF5 File
file2 Output HDF5 File
OPTIONS
-h, --help Print a usage message and exit
-v, --verbose Verbose mode, print object information
-V, --version Print version number and exit
-n, --native Use a native HDF5 type when repacking
-L, --latest Use latest version of file format
-c L1, --compact=L1 Maximum number of links in header messages
-d L2, --indexed=L2 Minimum number of links in the indexed format
-s S[:F], --ssize=S[:F] Shared object header message minimum size
-m M, --minimum=M Do not apply the filter to datasets smaller than M
-e E, --file=E Name of file E with the -f and -l options
-u U, --ublock=U Name of file U with user block data to be added
-b B, --block=B Size of user block to be added
-M A, --metadata_block_size=A Metadata block size for H5Pset_meta_block_size
-t T, --threshold=T Threshold value for H5Pset_alignment
-a A, --alignment=A Alignment value for H5Pset_alignment
-f FILT, --filter=FILT Filter type
-l LAYT, --layout=LAYT Layout type
-S FS_STRGY, --fs_strategy=FS_STRGY File space management strategy
-T FS_THRD, --fs_threshold=FS_THRD Free-space section threshold
M - is an integer greater than 1, size of dataset in bytes (default is 0)
E - is a filename.
S - is an integer
U - is a filename.
T - is an integer
A - is an integer greater than zero
B - is the user block size, any value that is 512 or greater and is
a power of 2 (1024 default)
F - is the shared object header message type, any of <dspace|dtype|fill|
pline|attr>. If F is not specified, S applies to all messages
FS_STRGY is the file space management strategy to use for the output file.
It is a string as listed below:
ALL_PERSIST - Use persistent free-space managers, aggregators and virtual file driver
for file space allocation
ALL - Use non-persistent free-space managers, aggregators and virtual file driver
for file space allocation
AGGR_VFD - Use aggregators and virtual file driver for file space allocation
VFD - Use virtual file driver for file space allocation
FS_THRD is the free-space section threshold to use for the output file.
It is the minimum size (in bytes) of free-space sections to be tracked
by the the library's free-space managers.
FILT - is a string with the format:
<list of objects>:<name of filter>=<filter parameters>
<list of objects> is a comma separated list of object names, meaning apply
compression only to those objects. If no names are specified, the filter
is applied to all objects
<name of filter> can be:
GZIP, to apply the HDF5 GZIP filter (GZIP compression)
SZIP, to apply the HDF5 SZIP filter (SZIP compression)
SHUF, to apply the HDF5 shuffle filter
FLET, to apply the HDF5 checksum filter
NBIT, to apply the HDF5 NBIT filter (NBIT compression)
SOFF, to apply the HDF5 Scale/Offset filter
UD, to apply a user defined filter
NONE, to remove all filters
<filter parameters> is optional filter parameter information
GZIP=<deflation level> from 1-9
SZIP=<pixels per block,coding> pixels per block is a even number in
2-32 and coding method is either EC or NN
SHUF (no parameter)
FLET (no parameter)
NBIT (no parameter)
SOFF=<scale_factor,scale_type> scale_factor is an integer and scale_type
is either IN or DS
UD=<filter_number,cd_value_count,value_1[,value_2,...,value_N]>
required values for filter_number,cd_value_count,value_1
optional values for value_2 to value_N
NONE (no parameter)
LAYT - is a string with the format:
<list of objects>:<layout type>=<layout parameters>
<list of objects> is a comma separated list of object names, meaning that
layout information is supplied for those objects. If no names are
specified, the layout type is applied to all objects
<layout type> can be:
CHUNK, to apply chunking layout
COMPA, to apply compact layout
CONTI, to apply contiguous layout
<layout parameters> is optional layout information
CHUNK=DIM[xDIM...xDIM], the chunk size of each dimension
COMPA (no parameter)
CONTI (no parameter)
Examples of use:
1) h5repack -v -f GZIP=1 file1 file2
GZIP compression with level 1 to all objects
2) h5repack -v -f dset1:SZIP=8,NN file1 file2
SZIP compression with 8 pixels per block and NN coding method to object dset1
3) h5repack -v -l dset1,dset2:CHUNK=20x10 -f dset3,dset4,dset5:NONE file1 file2
Chunked layout, with a layout size of 20x10, to objects dset1 and dset2
and remove filters to objects dset3, dset4, dset5
4) h5repack -L -c 10 -s 20:dtype file1 file2
Using latest file format with maximum compact group size of 10 and
and minimum shared datatype size of 20
5) h5repack -f SHUF -f GZIP=1 file1 file2
Add both filters SHUF and GZIP in this order to all datasets
6) h5repack -f UD=307,1,9 file1 file2
Add bzip2 filter to all datasets
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