Hi Kirk,
On Apr 19, 2010, at 12:37 PM, Kirk Harrison wrote:
> Does HDF5 support construction of a virtual HDF5 file composed of both local
> disk (e.g., H5FD_SEC2, H5FD_STDIO) and memory-based files (e.g., H5FD_CORE).
> possibly through the use of the H5FD_FAMILY driver?
>
> Application
> |
> |
> HDF5 Virtual File Layer (VLF)
> ( H5FD_FAMILY )
> | |
> | |
> H5FD_CORE H5FD_STDIO
> | |
> | |
> Memory Hard Drive
>
> I also would like to create an HDF5 file that has a small and fast memory
> cache for incoming live data and periodically write its contents to storage
> for longer term retrieval.
>
> It is not clear to me through the documentation whether the H5FD_FAMILY is
> only applicable to combining local disk (i.e. Hard Drive) based file
> drivers.
>
> The goal that I'm shooting for is seamless access across both a memory-based
> file and one that is stored on a hard disk.
Werner's suggestion of external links would work. You should also be
able to use the "split" file driver (H5Pset_fapl_split) with the core VFD for
metadata and sec2 VFD for raw data, if that's closer to your access pattern.
Quincey
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