Increasing H5O_MESG_MAX_SIZE value

HDF5 Library
1

Hi there,

What would be the impacts of increasing H5O_MESG_MAX_SIZE value to avoid “object header message is too large” error message in case of huge HDF5 compound dataset generation?

Regards.

2

This will not work, as the current file format only allows for 64KB object header messages.

Quincey
3

Thanks for the answer, though can you be more explicit?
Just to clarify my previous post : I was thinking about recompiling the lib with a bigger value (ex. 128) for H5O_MESG_MAX_SIZE constant.

4

The length of an object header message is encoded in a 16-bit integer currently. Increasing the constant will not help, by itself.

Quincey
5

Thanks for your help.