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()