HDF5 Tools

HDF5 Tool Interfaces

These tools enable the user to examine HDF5 files interactively.

h5dump -- A tool for displaying HDF5 file contents h5ls -- A tool for listing specified features of HDF5 file contents h5repart -- A tool for repartitioning a file, creating a family of files

Tool Name: h5dump

Syntax:

h5dump [-h] [-bb] [-header] [-a names] [-d names] [-g names] [-l names] [-t names] file

Purpose:

Displays HDF5 file contents.

Description:

h5dump enables the user to interactively examine the contents of an HDF5 file and dump those contents, in human readable form, to an ASCII file.

h5dump displays HDF5 file content on standard output. It may display the content of the whole HDF5 file or selected objects, which can be groups, datasets, links, attributes, or data types.

The -header option displays object header information only.

Names are the absolute names of the objects. h5dump displays objects in the order same as the command order. If a name does not start with a slash, h5dump begins searching for the specified object starting at the root group.

If an object is hard linked with multiple names, h5dump displays the content of the object in the first occurrence. Only the link information is displayed in later occurrences.

h5dump assigns a name for any unnamed data type in the form of #oid1:oid2, where oid1 and oid2 are the object identifiers assigned by the library. The unnamed types are displayed within the root group.

Data types are displayed with standard type names. For example, if a data set is created with H5T_NATIVE_INT type and the standard type name for integer on that machine is H5T_STD_I32BE, h5dump displays H5T_STD_I32BE as the type of the data set.

The h5dump output is described in detail in the DDL for HDF5, the Data Description Language document.

Options and Parameters:

-h

Prints information on this command.

-bb

Displays the contents of the boot block. The default is not to display.

-header

Displays header information only; no data is displayed.

-a names

Displays the specified attribute(s).

-d names

Displays the specified dataset(s).

-g names

Displays the specified group(s) and all the members.

-l names

Displays the values of the specified soft link(s).

-t names

Displays the specified named data type(s).

file

The file to be examined.

Current Status:

The current version of h5dump displays the following information:

• Group
  • group attributes
  • group member
• Dataset
  • dataset attributes
  • data type
  • data space
  • data
• Data type
  • scalar type
  • transient type
  • named type
  • unnamed type
• Simple data space
• Soft link
• Hard link

See Also:

HDF5 Data Description Language syntax (DDL for HDF5)

Tool Name: h5ls

Syntax:

h5ls [options] file [objects...]

Purpose:

Prints information about a file or dataset.

Description:

h5ls prints selected information about file objects in the specified format.

Options and Parameters:

-h   or   -?   or   --help

Print a usage message and exit.

-d   or   --dump

Print the values of datasets.

-wN   or   --width=N

Set the number of columns of output.

-v   or   --verbose

Generate more verbose output.

-V   or   --version

Print version number and exit.

file

The file name may include a printf(3C) integer format such as %%05d to open a file family.

objects

The names of zero or more objects about which information should be displayed. If a group is mentioned then information about each of its members is displayed. If no object names are specified then information about all of the objects in the root group is displayed.

Tool Name: h5repart

Syntax:

h5repart [-v] [-V] [-[b|m]N[g|m|k]] source_file dest_file

Purpose:

Repartitions a file or family of files.

Description:

h5repart splits a single file into a family of files, joins a family of files into a single file, or copies one family of files to another while changing the size of the family members. h5repart can also be used to copy a single file to a single file with holes.

Sizes associated with the -b and -m options may be suffixed with g for gigabytes, m for megabytes, or k for kilobytes.

File family names include an integer printf format such as %d.

Options and Parameters:

-v

Produce verbose output.

-V

Print a version number and exit.

-bN

The I/O block size, defaults to 1kB

-mN

The destination member size or 1GB

source_file

The name of the source file

dest_file

The name of the destination files