You need to specify the start vertex index when you construct the 
`VerticesBuilder`[1] if you want append vertices to existed graph. In your 
senario, the start vertex index should be 5001.

[1] 
https://graphar.apache.org/docs/cpp/classgraphar_1_1builder_1_1_vertices_builder.html#a8215ee434947314027aae3a7e10dac5b

Best,
Weibin Zeng

On 2024/08/25 06:51:45 Muniraju Pulipalyam wrote:
> I have an existing graph with 5000 vertices and 80000 edges. The vertices are 
> in 4 chunks. When I try to use verticesBuilder and create 5001st vertex to 
> add to existing collection, it is overriding existing vertex chunks. I also 
> tried WriteTable, but can't find a way to append. I saw samples on mid-level 
> and high-level writers and other samples where new files are created in /tmp 
> folder. I want to append a vertex to an existing vertex collection. What API 
> can I use to append a vertex to vertex collection and write back to file?
> 
> Thanks.
> 

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