Manage Milvus Connections

This topic describes how to connect to and disconnect from a Milvus server.

Milvus supports two ports, port 19530 and port 9091:

• Port 19530 is for gRPC. It is the default port when you connect to a Milvus server with different Milvus SDKs.

• Port 9091 is for RESTful API. It is used when you connect to a Milvus server with an HTTP client.

The example below connects to the Milvus server with host as localhost and port as 19530 or 9091, and disconncets from it. If the connection is refused, try unblocking the corresponding port.

Connect to a Milvus server

Construct a Milvus connection. Ensure to connect to Milvus server before any operations.

# Run `python3` in your terminal to operate in the Python interactive mode.
from pymilvus import connections
connections.connect(
  alias="default", 
  host='localhost', 
  port='19530'
)

import { MilvusClient } from "@zilliz/milvus2-sdk-node";
const address = "localhost:19530";
const milvusClient = new MilvusClient(address);

milvusClient, err := client.NewGrpcClient(
  context.Background(), // ctx
  "localhost:19530",    // addr
)
if err != nil {
  log.Fatal("failed to connect to Milvus:", err.Error())
}

final MilvusServiceClient milvusClient = new MilvusServiceClient(
  ConnectParam.newBuilder()
    .withHost("localhost")
    .withPort(19530)
    .build()
);

connect -h localhost -p 19530 -a default

curl localhost:9091/api/v1/health  
{"status":"ok"}

Disconnect from a Milvus server

Disconnect from a Milvus server.

connections.disconnect("default")

await milvusClient.closeConnection();

milvusClient.Close()

milvusClient.close()

connect -D

# Close your HTTP client connection.

Limits

The maximum number of connections is 65,536.

What’s next

Having connected to a Milvus server, you can:

• Create a collection
• Manage data
• Build a vector index
• Conduct a vector search
• Conduct a hybrid search