Version: User Guides (BYOC)

Modify Collection
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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
Java
NodeJS
Go
cURL

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"
)

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);

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"
});

import (
    "context"
    "fmt"

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

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

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

client, err := milvusclient.New(ctx, &milvusclient.ClientConfig{
    Address: milvusAddr,
    APIKey:  token,
})
if err != nil {
    fmt.Println(err.Error())
    // handle error
}
defer client.Close(ctx)

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

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

You can modify collection-level properties after a collection is created.

Supported properties

Property	Description
`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. For details, refer to Set Collection TTL.
`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. For details, refer to Use mmap.
`partitionkey.isolation`	With Partition Key Isolation enabled, Zilliz Cloud groups entities based on the Partition Key value and creates a separate index for each of these groups. Upon receiving a search request, Zilliz Cloud locates the index based on the Partition Key value specified in the filtering condition and restricts the search scope within the entities included in the index, thus avoiding scanning irrelevant entities during the search and greatly enhancing the search performance. For details, refer to Use Partition Key Isolation.
`dynamicfield.enabled`	Enables the dynamic field for collections that were created without enabling it. Once enabled, you can insert entities with fields not defined in the original schema. For details, refer to Dynamic Field.

Example 1: Set collection TTL

The following code snippet demonstrates how to set collection TTL.

Python
Java
NodeJS
Go
cURL

from pymilvus import MilvusClient

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

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);

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

err = client.AlterCollectionProperties(ctx, milvusclient.NewAlterCollectionPropertiesOption("my_collection").WithProperty(common.CollectionTTLConfigKey, 60))
if err != nil {
    fmt.Println(err.Error())
    // handle error
}

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

curl --request POST \
--url "${CLUSTER_ENDPOINT}/v2/vectordb/collections/alter_properties" \
--header "Authorization: Bearer ${TOKEN}" \
--header "Content-Type: application/json" \
-d '{
    "collectionName": "test_collection",
    "properties": {
        "collection.ttl.seconds": 60
    }
}'

Example 2: Enable mmap

The following code snippet demonstrates how to enable mmap.

Python
Java
NodeJS
Go
cURL

from pymilvus import MilvusClient

client.alter_collection_properties(
    collection_name="my_collection",
    properties={"mmap.enabled": True}
)

Map<String, String> properties = new HashMap<>();
properties.put("mmap.enabled", "True");

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

client.alterCollection(alterCollectionReq);

await client.alterCollectionProperties({
    collection_name: "my_collection",
    properties: {
        "mmap.enabled": true
    }
});

err = client.AlterCollectionProperties(ctx, milvusclient.NewAlterCollectionPropertiesOption("my_collection").WithProperty(common.MmapEnabledKey, true))
if err != nil {
    fmt.Println(err.Error())
    // handle error
}

# restful
curl -X POST "YOUR_CLUSTER_ENDPOINT/v2/vectordb/collections/alter_properties" \
  -H "Content-Type: application/json" \
  -d '{
    "collectionName": "my_collection",
    "properties": {
      "mmap.enabled": "true"
    }
  }'

Example 3: Enable partition key

The following code snippet demonstrates how to enable the partition key.

Python
Java
NodeJS
Go
cURL

from pymilvus import MilvusClient

client.alter_collection_properties(
    collection_name="my_collection",
    properties={"partitionkey.isolation": True}
)

Map<String, String> properties = new HashMap<>();
properties.put("partitionkey.isolation", "True");

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

client.alterCollection(alterCollectionReq);

await client.alterCollectionProperties({
    collection_name: "my_collection",
    properties: {
        "partitionkey.isolation": true
    }
});

err = client.AlterCollectionProperties(ctx, milvusclient.NewAlterCollectionPropertiesOption("my_collection").WithProperty(common.PartitionKeyIsolationKey, true))
if err != nil {
    fmt.Println(err.Error())
    // handle error
}

# restful
curl -X POST "YOUR_CLUSTER_ENDPOINT/v2/vectordb/collections/alter_properties" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer <token>" \
  -d '{
    "collectionName": "my_collection",
    "properties": {
      "partitionkey.isolation": "true"
    }
  }'

Example 4: Enable dynamic field

The following code snippet demonstrates how to enable the dynamic field.

Python
Java
NodeJS
Go
cURL

from pymilvus import MilvusClient

client.alter_collection_properties(
    collection_name="my_collection",
    properties={"dynamicfield.enabled": True}
)

Map<String, String> properties = new HashMap<>();
properties.put("dynamicfield.enabled", "True");

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

client.alterCollection(alterCollectionReq);

await client.alterCollectionProperties({
    collection_name: "my_collection",
    properties: {
        "dynamicfield.enabled": true
    }
});

err = client.AlterCollectionProperties(ctx, milvusclient.NewAlterCollectionPropertiesOption("my_collection").WithProperty(common.EnableDynamicSchemaKey, true))
if err != nil {
    fmt.Println(err.Error())
    // handle error
}

# restful
curl -X POST "YOUR_CLUSTER_ENDPOINT/v2/vectordb/collections/alter_properties" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer <token>" \
  -d '{
    "collectionName": "my_collection",
    "properties": {
      "dynamicfield.enabled": "true"
    }
  }'

Drop Collection Properties

You can also reset a collection property by dropping it as follows.

Python
Java
NodeJS
Go
cURL

client.drop_collection_properties(
    collection_name="my_collection",
    property_keys=[
        "collection.ttl.seconds"
    ]
)

client.dropCollectionProperties(DropCollectionPropertiesReq.builder()
        .collectionName("my_collection")
        .propertyKeys(Collections.singletonList("collection.ttl.seconds"))
        .build());

client.dropCollectionProperties({
    collection_name:"my_collection",
    properties: ['collection.ttl.seconds'],
});

err = client.DropCollectionProperties(ctx, milvusclient.NewDropCollectionPropertiesOption("my_collection", common.CollectionTTLConfigKey))
if err != nil {
    fmt.Println(err.Error())
    // handle error
}

curl --request POST \
--url "${CLUSTER_ENDPOINT}/v2/vectordb/collections/drop_properties" \
--header "Authorization: Bearer ${TOKEN}" \
--header "Content-Type: application/json" \
-d '{
    "collectionName": "my_collection",
    "propertyKeys": [
        "collection.ttl.seconds"
    ]
}'

Rename Collection​

Set Collection Properties​

Supported properties​

Example 1: Set collection TTL​

Example 2: Enable mmap​

Example 3: Enable partition key​

Example 4: Enable dynamic field​

Drop Collection Properties​