Modify Collection

You can rename a collection or change its settings. This page focuses on how to modify a collection.

Rename Collection

You can rename a collection as follows.

Python

from pymilvus import MilvusClient

client = MilvusClient(
    uri="YOUR_CLUSTER_ENDPOINT",
    token="YOUR_CLUSTER_TOKEN"
)

client.rename_collection(
    old_name="my_collection",
    new_name="my_new_collection"
)

Java

import io.milvus.v2.service.collection.request.RenameCollectionReq;
import io.milvus.v2.client.ConnectConfig;
import io.milvus.v2.client.MilvusClientV2;

String CLUSTER_ENDPOINT = "YOUR_CLUSTER_ENDPOINT";
String TOKEN = "YOUR_CLUSTER_TOKEN";

// 1. Connect to Milvus server
ConnectConfig connectConfig = ConnectConfig.builder()
    .uri(CLUSTER_ENDPOINT)
    .token(TOKEN)
    .build();
    
MilvusClientV2 client = new MilvusClientV2(connectConfig);

RenameCollectionReq renameCollectionReq = RenameCollectionReq.builder()
        .collectionName("my_collection")
        .newCollectionName("my_new_collection")
        .build();

client.renameCollection(renameCollectionReq);

NodeJS

import { MilvusClient, DataType } from "@zilliz/milvus2-sdk-node";

const address = "YOUR_CLUSTER_ENDPOINT";
const token = "YOUR_CLUSTER_TOKEN";
const client = new MilvusClient({address, token});

const res = await client.renameCollection({
    oldName: "my_collection",
    newName: "my_new_collection"
});

Go

import (
    "context"
    "fmt"
    "log"

    "github.com/milvus-io/milvus/client/v2/milvusclient"
)

ctx, cancel := context.WithCancel(context.Background())
defer cancel()

milvusAddr := "YOUR_CLUSTER_ENDPOINT"
token := "YOUR_CLUSTER_TOKEN"

cli, err := milvusclient.New(ctx, &milvusclient.ClientConfig{
    Address: milvusAddr,
    APIKey:  token,
})
if err != nil {
    log.Fatal("failed to connect to milvus server: ", err.Error())
}

defer cli.Close(ctx)

err = cli.RenameCollection(ctx, milvusclient.NewRenameCollectionOption("my_collection", "my_new_collection"))
if err != nil {
    // handle error
}

cURL

export CLUSTER_ENDPOINT="YOUR_CLUSTER_ENDPOINT"
export TOKEN="YOUR_CLUSTER_TOKEN"

curl --request POST \
--url "${CLUSTER_ENDPOINT}/v2/vectordb/collections/rename" \
--header "Authorization: Bearer ${TOKEN}" \
--header "Content-Type: application/json" \
-d '{
    "collectionName": "my_collection",
    "newCollectionName": "my_new_collection"
}'

Set Collection Properties

The following code snippet demonstrates how to set collection TTL.

Python

from pymilvus import MilvusClient

client.alter_collection_properties(
    collection_name="my_collection",
    properties={"collection.ttl.seconds": 60}
)

Java

import io.milvus.v2.service.collection.request.AlterCollectionReq;
import java.util.HashMap;
import java.util.Map;

Map<String, String> properties = new HashMap<>();
properties.put("collection.ttl.seconds", "60");

AlterCollectionReq alterCollectionReq = AlterCollectionReq.builder()
        .collectionName("my_collection")
        .properties(properties)
        .build();

client.alterCollection(alterCollectionReq);

NodeJS

res = await client.alterCollection({
    collection_name: "my_collection",
    properties: {
        "collection.ttl.seconds": 60
    }
})

Go

import (
    "context"
    "fmt"
    "log"

    "github.com/milvus-io/milvus/client/v2/milvusclient"
    "github.com/milvus-io/milvus/pkg/common"
)

ctx, cancel := context.WithCancel(context.Background())
defer cancel()

milvusAddr := "YOUR_CLUSTER_ENDPOINT"

cli, err := milvusclient.New(ctx, &milvusclient.ClientConfig{
    Address: milvusAddr,
})
if err != nil {
    log.Fatal("failed to connect to milvus server: ", err.Error())
}

defer cli.Close(ctx)

err = cli.AlterCollection(ctx, milvusclient.NewAlterCollectionOption("my_collection").WithProperty(common.CollectionTTLConfigKey, 60))
if err != nil {
    // handle error
}

cURL

# REST

The applicable collection properties are as follows:

Property	When to Use
collection.ttl.seconds	If the data of a collection needs to be deleted after a specific period, consider setting its Time-To-Live (TTL) in seconds. Once the TTL times out, Zilliz Cloud deletes all entities from the collection. The deletion is asynchronous, indicating that searches and queries are still possible before the deletion is complete.
mmap.enabled	Memory mapping (Mmap) enables direct memory access to large files on disk, allowing Zilliz Cloud to store indexes and data in both memory and hard drives. This approach helps optimize data placement policy based on access frequency, expanding storage capacity for collections without impacting search performance. Zilliz Cloud implements global mmap settings for your clusters. You can change the settings on a specific field or its index.