This function is only for use with the core VFD and must be used after the call to H5P_SET_FAPL_CORE. It is an error to use this function with any other VFD.
This function only applies to the backing store write operation which typically occurs when the file is flushed or closed. This function has no relationship to the increment parameter passed to H5P_SET_FAPL_CORE.
For optimum performance, the
page_size parameter should be a power of two.