Mengubah Bidang Koleksi

Anda dapat mengubah properti bidang koleksi untuk mengubah batasan kolom atau menerapkan aturan integritas data yang lebih ketat.

Mengubah bidang VarChar

Bidang VarChar memiliki properti bernama max_length, yang membatasi jumlah maksimum karakter yang dapat dimuat oleh nilai bidang. Anda dapat mengubah properti max_length.

Contoh berikut ini mengasumsikan koleksi memiliki field VarChar bernama varchar dan menetapkan properti max_length.

from pymilvus import MilvusClient

client = MilvusClient(
    uri="http://localhost:19530",
    token="root:Milvus"
)

client.alter_collection_field(
    collection_name="my_collection",
    field_name="varchar",
    field_params={
        "max_length": 1024
    }
)

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

ConnectConfig config = ConnectConfig.builder()
        .uri("http://localhost:19530")
        .token("root:Milvus")
        .build();
MilvusClientV2 client = new MilvusClientV2(config);

client.alterCollectionField(AlterCollectionFieldReq.builder()
        .collectionName("my_collection")
        .fieldName("varchar")
        .property("max_length", "1024")
        .build());

await client.alterCollectionFieldProperties({
  collection_name: LOAD_COLLECTION_NAME,
  field_name: 'varchar',
  properties: { max_length: 1024 },
});

import (
    "context"
    "fmt"

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

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

milvusAddr := "localhost:19530"

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

err = client.AlterCollectionFieldProperty(ctx, milvusclient.NewAlterCollectionFieldPropertiesOption(
    "my_collection", "varchar").WithProperty(common.MaxLengthKey, 1024))
if err != nil {
    fmt.Println(err.Error())
    // handle error
}

# restful
curl --request POST \
--url "${CLUSTER_ENDPOINT}/v2/collections/fields/alter_properties" \
--header "Authorization: Bearer ${TOKEN}" \
--header "Content-Type: application/json" \
--data "{
    "collectionName": "my_collection",
    "field_name": "varchar",
    "properties": {
        "max_length": "1024"
    }
}"

Mengubah bidang ARRAY

Bidang array memiliki dua properti, yaitu element_type dan max_capacity. Yang pertama menentukan tipe data dari elemen dalam larik, sedangkan yang kedua membatasi jumlah maksimum elemen dalam larik. Anda dapat mengubah properti max_capacity saja.

Contoh berikut ini mengasumsikan koleksi memiliki field array bernama array dan menetapkan properti max_capacity.

client.alter_collection_field(
    collection_name="my_collection",
    field_name="array",
    field_params={
        "max_capacity": 64
    }
)

client.alterCollectionField(AlterCollectionFieldReq.builder()
        .collectionName("my_collection")
        .fieldName("array")
        .property("max_capacity", "64")
        .build());

await client.alterCollectionFieldProperties({
  collection_name: "my_collection",
  field_name: 'array',
  properties: { 
      max_capacity: 64 
  }
});

err = client.AlterCollectionFieldProperty(ctx, milvusclient.NewAlterCollectionFieldPropertiesOption(
    "my_collection", "array").WithProperty(common.MaxCapacityKey, 64))
if err != nil {
    fmt.Println(err.Error())
    // handle error
}

# restful
curl --request POST \
--url "${CLUSTER_ENDPOINT}/v2/collections/fields/alter_properties" \
--header "Authorization: Bearer ${TOKEN}" \
--header "Content-Type: application/json" \
--data "{
    "collectionName": "my_collection",
    "field_name": "array",
    "properties": {
        "max_capacity": "64"
    }
}"

Mengubah pengaturan mmap tingkat bidang

Pemetaan memori (Mmap) memungkinkan akses memori langsung ke berkas-berkas besar di disk, sehingga Milvus dapat menyimpan indeks dan data di memori dan hard drive. Pendekatan ini membantu mengoptimalkan kebijakan penempatan data berdasarkan frekuensi akses, memperluas kapasitas penyimpanan untuk koleksi tanpa memengaruhi kinerja pencarian.

Contoh berikut ini mengasumsikan koleksi memiliki field bernama doc_chunk dan menetapkan properti mmap_enabled.

client.alter_collection_field(
    collection_name="my_collection",
    field_name="doc_chunk",
    field_params={"mmap.enabled": True}
)

client.alterCollectionField(AlterCollectionFieldReq.builder()
        .collectionName("my_collection")
        .fieldName("doc_chunk")
        .property("mmap.enabled", "True")
        .build());

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

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

# restful
curl --request POST \
--url "${CLUSTER_ENDPOINT}/v2/collections/fields/alter_properties" \
--header "Authorization: Bearer ${TOKEN}" \
--header "Content-Type: application/json" \
--data "{
    "collectionName": "my_collection",
    "field_name": "doc_chunk",
    "properties": {
        "mmap.enabled": True
    }
}"