How to Build an Elastic Vector Database with Consistent Hashing, Sharding, and Live Ring Visualization for RAG Systems

def draw_ring(ring: ConsistentHashRing, dist: Dict[str, int], title: str):
   node_ids = sorted(ring.nodes.keys())
   plt.figure(figsize=(8, 8))
   ax = plt.gca()
   ax.set_title(title)


   if not node_ids:
       plt.text(0.5, 0.5, "Ring is empty", ha="center", va="center")
       plt.axis("off")
       plt.show()
       return


   G = nx.Graph()
   for nid in node_ids:
       G.add_node(nid)
   for i in range(len(node_ids)):
       G.add_edge(node_ids[i], node_ids[(i + 1) % len(node_ids)])


   pos = nx.circular_layout(G)
   vnode_counts = ring.snapshot()
   labels = {
       nid: f"{nid}\nkeys={dist.get(nid,0)}\nvnodes={vnode_counts.get(nid,0)}"
       for nid in node_ids
   }


   nx.draw_networkx_edges(G, pos, alpha=0.4, width=2)
   nx.draw_networkx_nodes(G, pos, node_size=2200)
   nx.draw_networkx_labels(G, pos, labels=labels, font_size=9)
   plt.axis("off")
   plt.show()