I was able to do about 50k relationships in a single

zed import

. It after that, the gRPC request gets too large and

zed

would fail with

Error: rpc error: code = ResourceExhausted desc = grpc: received message larger than max (6989893 vs. 4194304)

To get around this, I ended up using one of the gRPC clients the Authzed folks have and I parsed and batched the relationships myself. I think the

zed

client could easily be modified to batch very large imports by adding some batching logic here: https://github.com/authzed/zed/blob/e9bfd18aee346632fdbd08ecdb6a38f3a41c6098/cmd/zed/import.go#L144-L150