How to store 16D vector or array in vdb

[boringfish]

Hello，everyone！
I encountered a problem when I tried to use openvdb. My current requirement is to store an array or vector containing 16 floats in the vdb grid, but currently openvdb only supports the storage of 4D vectors at most. Therefore, is there a solution to store multiple elements in the grid? An alternative solution may be to use four Vec4 grids instead, but I am worried that this will affect memory and performance.
Thanks for your help!