객체 스토리지 클래스 업데이트

Cloud Storage 객체의 객체 스토리지 클래스를 재작성하고 업데이트합니다.

더 살펴보기

이 코드 샘플이 포함된 자세한 문서는 다음을 참조하세요.

• 객체 스토리지 클래스 변경

코드 샘플

C++

자세한 내용은 Cloud Storage C++ API 참고 문서를 확인하세요.

Cloud Storage에 인증하려면 애플리케이션 기본 사용자 인증 정보를 설정합니다. 자세한 내용은 로컬 개발 환경의 인증 설정을 참조하세요.

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
   std::string const& object_name, std::string const& storage_class) {
  StatusOr<gcs::ObjectMetadata> object_metadata =
      client.RewriteObjectBlocking(
          bucket_name, object_name, bucket_name, object_name,
          gcs::WithObjectMetadata(
              gcs::ObjectMetadata().set_storage_class(storage_class)));
  if (!object_metadata) throw std::move(object_metadata).status();

  std::cout << "Changed storage class of object " << object_metadata->name()
            << " in bucket " << object_metadata->bucket() << " to "
            << object_metadata->storage_class() << "\n";
}

C#

자세한 내용은 Cloud Storage C# API 참고 문서를 확인하세요.

Cloud Storage에 인증하려면 애플리케이션 기본 사용자 인증 정보를 설정합니다. 자세한 내용은 로컬 개발 환경의 인증 설정을 참조하세요.

using Google.Cloud.Storage.V1;
using System;

public class ChangeFileStorageClassSample
{
    public Google.Apis.Storage.v1.Data.Object ChangeFileStorageClass(
        string bucketName = "your-bucket-name",
        string objectName = "your-object-name",
        string storageClass = StorageClasses.Standard)
    {
        var storage = StorageClient.Create();

        // Changing storage class requires a rewrite operation, which can only be done
        // by the underlying service
        var obj = new Google.Apis.Storage.v1.Data.Object { StorageClass = storageClass };
        storage.Service.Objects.Rewrite(obj, bucketName, objectName, bucketName, objectName).Execute();

        var file = storage.GetObject(bucketName, objectName);
        Console.WriteLine($"Object {objectName} in bucket {bucketName} had" +
            $" its storage class set to {storageClass}.");

        return file;
    }
}

Go

자세한 내용은 Cloud Storage Go API 참고 문서를 확인하세요.

Cloud Storage에 인증하려면 애플리케이션 기본 사용자 인증 정보를 설정합니다. 자세한 내용은 로컬 개발 환경의 인증 설정을 참조하세요.

import (
	"context"
	"fmt"
	"io"
	"time"

	"cloud.google.com/go/storage"
)

// changeObjectStorageClass changes the storage class of a single object.
func changeObjectStorageClass(w io.Writer, bucket, object string) error {
	// bucket := "bucket-name"
	// object := "object-name"
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("storage.NewClient: %w", err)
	}
	defer client.Close()

	ctx, cancel := context.WithTimeout(ctx, time.Second*10)
	defer cancel()

	o := client.Bucket(bucket).Object(object)

	// Optional: set a generation-match precondition to avoid potential race
	// conditions and data corruptions. The request to copy is aborted if the
	// object's generation number does not match your precondition.
	attrs, err := o.Attrs(ctx)
	if err != nil {
		return fmt.Errorf("object.Attrs: %w", err)
	}
	o = o.If(storage.Conditions{GenerationMatch: attrs.Generation})

	// See the StorageClass documentation for other valid storage classes:
	// https://cloud.google.com/storage/docs/storage-classes
	newStorageClass := "COLDLINE"
	// You can't change an object's storage class directly, the only way is
	// to rewrite the object with the desired storage class.
	copier := o.CopierFrom(o)
	copier.StorageClass = newStorageClass
	if _, err := copier.Run(ctx); err != nil {
		return fmt.Errorf("copier.Run: %w", err)
	}
	fmt.Fprintf(w, "Object %v in bucket %v had its storage class set to %v\n", object, bucket, newStorageClass)
	return nil
}

Java

자세한 내용은 Cloud Storage Java API 참고 문서를 확인하세요.

Cloud Storage에 인증하려면 애플리케이션 기본 사용자 인증 정보를 설정합니다. 자세한 내용은 로컬 개발 환경의 인증 설정을 참조하세요.

import com.google.cloud.storage.Blob;
import com.google.cloud.storage.BlobId;
import com.google.cloud.storage.BlobInfo;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageClass;
import com.google.cloud.storage.StorageOptions;

public class ChangeObjectStorageClass {
  public static void changeObjectStorageClass(
      String projectId, String bucketName, String objectName) {
    // The ID of your GCP project
    // String projectId = "your-project-id";

    // The ID of your GCS bucket
    // String bucketName = "your-unique-bucket-name";

    // The ID of your GCS object
    // String objectName = "your-object-name";

    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();
    BlobId blobId = BlobId.of(bucketName, objectName);
    Blob sourceBlob = storage.get(blobId);
    if (sourceBlob == null) {
      System.out.println("The object " + objectName + " wasn't found in " + bucketName);
      return;
    }

    // See the StorageClass documentation for other valid storage classes:
    // https://googleapis.dev/java/google-cloud-clients/latest/com/google/cloud/storage/StorageClass.html
    StorageClass storageClass = StorageClass.COLDLINE;

    // You can't change an object's storage class directly, the only way is to rewrite the object
    // with the desired storage class

    BlobInfo targetBlob = BlobInfo.newBuilder(blobId).setStorageClass(storageClass).build();

    // Optional: set a generation-match precondition to avoid potential race
    // conditions and data corruptions. The request to upload returns a 412 error if
    // the object's generation number does not match your precondition.
    Storage.BlobSourceOption precondition =
        Storage.BlobSourceOption.generationMatch(sourceBlob.getGeneration());

    Storage.CopyRequest request =
        Storage.CopyRequest.newBuilder()
            .setSource(blobId)
            .setSourceOptions(precondition) // delete this line to run without preconditions
            .setTarget(targetBlob)
            .build();
    Blob updatedBlob = storage.copy(request).getResult();

    System.out.println(
        "Object "
            + objectName
            + " in bucket "
            + bucketName
            + " had its storage class set to "
            + updatedBlob.getStorageClass().name());
  }
}

Node.js

자세한 내용은 Cloud Storage Node.js API 참고 문서를 확인하세요.

Cloud Storage에 인증하려면 애플리케이션 기본 사용자 인증 정보를 설정합니다. 자세한 내용은 로컬 개발 환경의 인증 설정을 참조하세요.

// Imports the Google Cloud client library
const {Storage} = require('@google-cloud/storage');

// Creates a client
const storage = new Storage();

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// The ID of your GCS bucket
// const bucketName = 'your-unique-bucket-name';

// The ID of your GCS file
// const fileName = 'your-file-name';

// The name of a storage class
// See the StorageClass documentation for other valid storage classes:
// https://googleapis.dev/java/google-cloud-clients/latest/com/google/cloud/storage/StorageClass.html
// const storageClass = 'coldline';

async function fileChangeStorageClass() {
  // Optional:
  // Set a generation-match precondition to avoid potential race conditions
  // and data corruptions. The request to copy is aborted if the object's
  // generation number does not match your precondition. For a destination
  // object that does not yet exist, set the ifGenerationMatch precondition to 0
  // If the destination object already exists in your bucket, set instead a
  // generation-match precondition using its generation number.
  const setStorageClassOptions = {
    ifGenerationMatch: generationMatchPrecondition,
  };

  await storage
    .bucket(bucketName)
    .file(fileName)
    .setStorageClass(storageClass, setStorageClassOptions);

  console.log(`${fileName} has been set to ${storageClass}`);
}

fileChangeStorageClass().catch(console.error);

PHP

자세한 내용은 Cloud Storage PHP API 참고 문서를 확인하세요.

Cloud Storage에 인증하려면 애플리케이션 기본 사용자 인증 정보를 설정합니다. 자세한 내용은 로컬 개발 환경의 인증 설정을 참조하세요.

use Google\Cloud\Storage\StorageClient;

/**
 * Change the storage class of the given file.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 *        (e.g. 'my-bucket')
 * @param string $objectName The name of your Cloud Storage object.
 *        (e.g. 'my-object')
 * @param string $storageClass The storage class of the new object.
 *        (e.g. 'COLDLINE')
 */
function change_file_storage_class(string $bucketName, string $objectName, string $storageClass): void
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $object = $bucket->object($objectName);

    // Storage class cannot be changed directly. But we can rewrite the object
    // using the new storage class.

    $newObject = $object->rewrite($bucket, [
        'storageClass' => $storageClass,
    ]);

    printf(
        'Object %s in bucket %s had its storage class set to %s',
        $objectName,
        $bucketName,
        $newObject->info()['storageClass']
    );
}

Python

자세한 내용은 Cloud Storage Python API 참고 문서를 확인하세요.

Cloud Storage에 인증하려면 애플리케이션 기본 사용자 인증 정보를 설정합니다. 자세한 내용은 로컬 개발 환경의 인증 설정을 참조하세요.

from google.cloud import storage


def change_file_storage_class(bucket_name, blob_name):
    """Change the default storage class of the blob"""
    # bucket_name = "your-bucket-name"
    # blob_name = "your-object-name"

    storage_client = storage.Client()

    bucket = storage_client.bucket(bucket_name)
    blob = bucket.blob(blob_name)
    generation_match_precondition = None

    # Optional: set a generation-match precondition to avoid potential race
    # conditions and data corruptions. The request is aborted if the
    # object's generation number does not match your precondition.
    blob.reload()  # Fetch blob metadata to use in generation_match_precondition.
    generation_match_precondition = blob.generation

    blob.update_storage_class("NEARLINE", if_generation_match=generation_match_precondition)

    print(
        "Blob {} in bucket {} had its storage class set to {}".format(
            blob_name,
            bucket_name,
            blob.storage_class
        )
    )
    return blob

Ruby

자세한 내용은 Cloud Storage Ruby API 참고 문서를 확인하세요.

Cloud Storage에 인증하려면 애플리케이션 기본 사용자 인증 정보를 설정합니다. 자세한 내용은 로컬 개발 환경의 인증 설정을 참조하세요.

def change_file_storage_class bucket_name:, file_name:
  # The ID of your GCS bucket
  # bucket_name = "your-unique-bucket-name"

  # The ID of your GCS object
  # file_name = "your-file-name"

  require "google/cloud/storage"

  storage = Google::Cloud::Storage.new
  bucket = storage.bucket bucket_name, skip_lookup: true

  file = bucket.file file_name

  file.storage_class = "NEARLINE"

  puts "File #{file_name} in bucket #{bucket_name} had its storage class set to #{file.storage_class}"
end

다음 단계

다른 Google Cloud 제품의 코드 샘플을 검색하고 필터링하려면 Google Cloud 샘플 브라우저를 참조하세요.