Hi Mark,
On Mar 3, 2010, at 12:51 PM, Mark Miller wrote:
> Hi All,
>
> I am seeing some behavior in some tests that I am doing that suggests
> that on the sec2 vfd (or any vfd I've tried) the small data block size
> property (H5Pset_small_data_block_size) is having no effect in changing
> I/O requests to underlying system I/O interface.
>
> Does anyone have experience using this file access property such that
> they KNOW FOR CERTAIN it is taking effect and indeed resulting in
> different (lower) I/O request frequency to underlying I/O interface?
This API routine is only used to "push" allocation of the space for
storing small dataset raw data together in the file. It has no effect on I/O
requests to the underlying system. H5Pset_sieve_buf_size may help you out
though...
Quincey
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