Question How to pass chunks of StructedBuffers into a compute shader

I have a sparse voxel octree that is flatten for the gpu now I have the problem that this only allows one octree at a time and not multiple chunks, I thought about combining the octrees but that would mean I have to store the old octree per chunk and the combined octrees (which would double the memory) maybe there is a better solution I am not aware of yet.

Code (CSharp):

1. StructuredBuffer<GPUOctreeNode> _SVOBuffer;
2. StructuredBuffer <float4> _SVOData;

 

The GPUOctreeNode looks like this, it points to the _SVOData with the dataIndex

Code (CSharp):

1. struct GPUOctreeNode {
2.     float3 position;
3.     float halfSize;
4.     int childIndex;
5.     int dataIndex;
6. };

 

or I would store the octree chunks in a combined structuredBuffer only and use compute shaders to add and remove chunks during runtime, this way I dont need to keep the old per chunk octree in memory