Re: question about HDF5 parallel use of unlimited dimensions...

"Robert E. McGrath" <mcgrath@xxxxxxxxxxxxx> writes:

> In general, any update to the file in parallel needs to be done
> thoughtfully, and generally should be done in batches rather than
> small increments.
> Extending by single records is inefficient in all cases, but
> very costly in parallel, since it updates a global state.

Does that mean parallel programmers generally don't use unlimited
dimensions? Or they use them, but batch their extends to avoid this

Or do they use them, but do something else to prevent this problem.

Thanks for helping me understand this!


Ed Hartnett  -- ed@xxxxxxxxxxxxxxxx