Do not set h_align when opening an existing file to write

Parallel-NetCDF / PnetCDF

Source code repository of PnetCDF library and utilities

https://parallel-netcdf.github.io

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Do not set h_align when opening an existing file to write #125

Closed wkliao closed 6 months ago

wkliao commented 6 months ago

When users do not set nc_header_align_size (h_align) and open a file to add more metadata, setting h_align may unexpectedly grow the file header extent.