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Use Autoclass

This page shows you how to enable, disable, and check the status of the Autoclass feature , which is set on a bucket in Cloud Storage.

Required roles

To get the permissions that you need to set and manage Autoclass on a bucket, ask your administrator to grant you the Storage Admin ( roles/storage.admin ) IAM role on the bucket. This predefined role contains the permissions required to set and manage Autoclass on a bucket. To see the exact permissions that are required, expand the Required permissionssection:

Required permissions

storage.buckets.get
storage.buckets.list
- This permission is only required for using the Google Cloud console to perform the tasks on this page.
storage.buckets.update

You can also get these permissions with custom roles .

For information about granting roles on buckets, see Use IAM with buckets .

Set Autoclass for a bucket

To set Autoclass for a bucket, complete the following instructions:

Console

In the Google Cloud console, go to the Cloud Storage Buckets page.

Go to Buckets
In the list of buckets, click the name of the desired bucket.
In the Bucket detailspage, click the Configurationtab.
Click the Editicon ( ) for Default storage class.
In the overlay window, select Autoclassto enable Autoclass. To disable Autoclass, select Set a default class, and then select a default storage class for the bucket.
Click Confirm.
To switch the terminal storage class for a bucket that has Autoclass enabled, click the Editicon ( ) for Included classes, and click Confirmin the overlay window that appears.

Command line

Use the gcloud storage buckets update command with the appropriate flags:

gcloud storage buckets update gs:// BUCKET_NAME 
--default-storage-class= DEFAULT_CLASS 
 AUTOCLASS_FLAG

Where:

BUCKET_NAME is the name of the relevant bucket. For example, my-bucket .
DEFAULT_CLASS sets the storage class metadata for the bucket. When enabling Autoclass, STANDARD is the only valid value and is required if the bucket currently uses a different storage class.
AUTOCLASS_FLAG is one of the following:
- --enable-autoclass to enable Autoclass.
- --no-enable-autoclass to disable Autoclass.
- --autoclass-terminal-storage-class= CLASS to set the terminal storage class for Autoclass. CLASS can be either NEARLINE or ARCHIVE . When using this flag on a bucket with Autoclass disabled, also include the --enable-autoclass flag in the command.

If successful, the response looks similar to the following example:

Updating gs://my-bucket/...
  Completed 1

Client libraries

C++

For more information, see the Cloud Storage C++ API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  namespace 
  
 gcs 
  
 = 
  
 :: 
 google 
 :: 
 cloud 
 :: 
 storage 
 ; 
 []( 
 gcs 
 :: 
 Client 
  
 client 
 , 
  
 std 
 :: 
 string 
  
 const 
&  
 bucket_name 
 , 
  
 bool 
  
 enabled 
 ) 
  
 { 
  
 auto 
  
 metadata 
  
 = 
  
 client 
 . 
 PatchBucket 
 ( 
  
 bucket_name 
 , 
  
 gcs 
 :: 
 BucketMetadataPatchBuilder 
 (). 
 SetAutoclass 
 ( 
  
 gcs 
 :: 
 BucketAutoclass 
 { 
 enabled 
 })); 
  
 if 
  
 ( 
 ! 
 metadata 
 ) 
  
 throw 
  
 google 
 :: 
 cloud 
 :: 
 Status 
 ( 
 std 
 :: 
 move 
 ( 
 metadata 
 ). 
 status 
 ()); 
  
 std 
 :: 
 cout 
 << 
 "The autoclass configuration for bucket " 
 << 
 bucket_name 
 << 
 " was successfully updated." 
 ; 
  
 if 
  
 ( 
 ! 
 metadata 
 - 
> has_autoclass 
 ()) 
  
 { 
  
 std 
 :: 
 cout 
 << 
 " The bucket no longer has an autoclass configuration. 
 \n 
 " 
 ; 
  
 return 
 ; 
  
 } 
  
 std 
 :: 
 cout 
 << 
 " The new configuration is " 
 << 
 metadata 
 - 
> autoclass 
 () 
 << 
 " 
 \n 
 " 
 ; 
 }

C#

For more information, see the Cloud Storage C# API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  using 
  
  Google.Cloud.Storage.V1 
 
 ; 
 using 
  
 Google.Apis.Storage.v1.Data 
 ; 
 using 
  
 static 
  
 Google 
 . 
 Apis 
 . 
 Storage 
 . 
 v1 
 . 
 Data 
 . 
 Bucket 
 ; 
 using 
  
 System 
 ; 
 public 
  
 class 
  
 SetAutoclassSample 
 { 
  
 public 
  
 Bucket 
  
 SetAutoclass 
 ( 
 string 
  
 bucketName 
 ) 
  
 { 
  
 var 
  
 storage 
  
 = 
  
  StorageClient 
 
 . 
  Create 
 
 (); 
  
 var 
  
 bucket 
  
 = 
  
 storage 
 . 
 GetBucket 
 ( 
 bucketName 
 ); 
  
 bucket 
 . 
 Autoclass 
  
 = 
  
 new 
  
 AutoclassData 
  
 { 
  
 Enabled 
  
 = 
  
 true 
 , 
  
 TerminalStorageClass 
  
 = 
  
 "ARCHIVE" 
  
 }; 
  
 storage 
 . 
 PatchBucket 
 ( 
 bucket 
 ); 
  
 Console 
 . 
 WriteLine 
 ( 
 $"Autoclass enabled is set to {bucket.Autoclass.Enabled} for {bucketName} at {bucket.Autoclass.ToggleTimeDateTimeOffset}." 
 ); 
  
 Console 
 . 
 WriteLine 
 ( 
 $"Autoclass terminal storage class is {bucket.Autoclass.TerminalStorageClass}." 
 ); 
  
 return 
  
 bucket 
 ; 
  
 } 
 }

Go

For more information, see the Cloud Storage Go API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  import 
  
 ( 
  
 "context" 
  
 "fmt" 
  
 "io" 
  
 "time" 
  
 "cloud.google.com/go/storage" 
 ) 
 // setAutoclass sets the Autoclass configuration for a bucket. 
 func 
  
 setAutoclass 
 ( 
 w 
  
 io 
 . 
  Writer 
 
 , 
  
 bucketName 
  
 string 
 ) 
  
 error 
  
 { 
  
 // bucketName := "bucket-name" 
  
 // To update the configuration for Autoclass.TerminalStorageClass, 
  
 // Autoclass.Enabled must also be set to true. 
  
 // To disable autoclass on the bucket, set to an empty &Autoclass{}. 
  
 enabled 
  
 := 
  
 true 
  
 terminalStorageClass 
  
 := 
  
 "ARCHIVE" 
  
 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 
 () 
  
 bucket 
  
 := 
  
 client 
 . 
  Bucket 
 
 ( 
 bucketName 
 ) 
  
 bucketAttrsToUpdate 
  
 := 
  
 storage 
 . 
  BucketAttrsToUpdate 
 
 { 
  
 Autoclass 
 : 
  
& storage 
 . 
  Autoclass 
 
 { 
  
 Enabled 
 : 
  
 enabled 
 , 
  
 TerminalStorageClass 
 : 
  
 terminalStorageClass 
 , 
  
 }, 
  
 } 
  
 if 
  
 _ 
 , 
  
 err 
  
 := 
  
 bucket 
 . 
 Update 
 ( 
 ctx 
 , 
  
 bucketAttrsToUpdate 
 ); 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 fmt 
 . 
 Errorf 
 ( 
 "Bucket(%q).Update: %w" 
 , 
  
 bucketName 
 , 
  
 err 
 ) 
  
 } 
  
 fmt 
 . 
 Fprintf 
 ( 
 w 
 , 
  
 "Autoclass enabled was set to %v on bucket %q \n" 
 , 
  
 bucketAttrsToUpdate 
 . 
  Autoclass 
 
 . 
 Enabled 
 , 
  
 bucketName 
 ) 
  
 fmt 
 . 
 Fprintf 
 ( 
 w 
 , 
  
 "Autoclass terminal storage class was last updated to %v at %v" 
 , 
  
 bucketAttrsToUpdate 
 . 
  Autoclass 
 
 . 
 TerminalStorageClass 
 , 
  
 bucketAttrsToUpdate 
 . 
  Autoclass 
 
 . 
 TerminalStorageClassUpdateTime 
 ) 
  
 return 
  
 nil 
 }

Java

For more information, see the Cloud Storage Java API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  import 
  
 com.google.cloud.storage. Bucket 
 
 ; 
 import 
  
 com.google.cloud.storage. BucketInfo 
. Autoclass 
 
 ; 
 import 
  
 com.google.cloud.storage. Storage 
 
 ; 
 import 
  
 com.google.cloud.storage. Storage 
. BucketTargetOption 
 
 ; 
 import 
  
 com.google.cloud.storage. StorageClass 
 
 ; 
 import 
  
 com.google.cloud.storage. StorageOptions 
 
 ; 
 public 
  
 class 
 SetBucketAutoclass 
  
 { 
  
 public 
  
 static 
  
 void 
  
 setBucketAutoclass 
 ( 
  
 String 
  
 projectId 
 , 
  
 String 
  
 bucketName 
 , 
  
  StorageClass 
 
  
 storageClass 
 ) 
  
 throws 
  
 Exception 
  
 { 
  
 // The ID of your GCP project 
  
 // String projectId = "your-project-id"; 
  
 // The ID of your GCS bucket 
  
 // String bucketName = "your-unique-bucket-name"; 
  
 // The storage class that objects in an Autoclass bucket eventually transition to if not read 
  
 // for a certain length of time 
  
 // StorageClass storageClass = StorageClass.ARCHIVE; 
  
 // Configure the Autoclass setting for a bucket. 
  
 // Note:  terminal_storage_class field is optional and defaults to NEARLINE if not otherwise 
  
 // specified. Valid terminal_storage_class values are NEARLINE and ARCHIVE. 
  
 boolean 
  
 enabled 
  
 = 
  
 true 
 ; 
  
 try 
  
 ( 
  Storage 
 
  
 storage 
  
 = 
  
  StorageOptions 
 
 . 
 newBuilder 
 (). 
 setProjectId 
 ( 
 projectId 
 ). 
 build 
 (). 
  getService 
 
 ()) 
  
 { 
  
  Bucket 
 
  
 bucket 
  
 = 
  
 storage 
 . 
 get 
 ( 
 bucketName 
 ); 
  
  Bucket 
 
  
 toUpdate 
  
 = 
  
 bucket 
 . 
  toBuilder 
 
 () 
  
 . 
 setAutoclass 
 ( 
  
  Autoclass 
 
 . 
 newBuilder 
 () 
  
 . 
 setEnabled 
 ( 
 enabled 
 ) 
  
 . 
  setTerminalStorageClass 
 
 ( 
 storageClass 
 ) 
  
 . 
 build 
 ()) 
  
 . 
 build 
 (); 
  
  Bucket 
 
  
 updated 
  
 = 
  
 storage 
 . 
 update 
 ( 
 toUpdate 
 , 
  
  BucketTargetOption 
 
 . 
 metagenerationMatch 
 ()); 
  
 System 
 . 
 out 
 . 
 println 
 ( 
  
 "Autoclass for bucket " 
  
 + 
  
 bucketName 
  
 + 
  
 " was " 
  
 + 
  
 ( 
 updated 
 . 
  getAutoclass 
 
 (). 
 getEnabled 
 () 
  
 ? 
  
 "enabled." 
  
 : 
  
 "disabled." 
 )); 
  
 System 
 . 
 out 
 . 
 println 
 ( 
  
 "Autoclass terminal storage class is " 
  
 + 
  
 updated 
 . 
  getAutoclass 
 
 (). 
  getTerminalStorageClass 
 
 (). 
 toString 
 ()); 
  
 } 
  
 } 
 }

Node.js

For more information, see the Cloud Storage Node.js API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  /** 
 * TODO(developer): Uncomment the following lines before running the sample. 
 */ 
 // The ID of your GCS bucket 
 // const bucketName = 'your-unique-bucket-name'; 
 // The terminal storage class to be set on your GCS bucket. Valid values are NEARLINE and ARCHIVE. 
 // const terminalStorageClass = 'NEARLINE'; 
 // Imports the Google Cloud client library 
 const 
  
 { 
 Storage 
 } 
  
 = 
  
 require 
 ( 
 ' @google-cloud/storage 
' 
 ); 
 // Creates a client 
 const 
  
 storage 
  
 = 
  
 new 
  
 Storage 
 (); 
 async 
  
 function 
  
 setAutoclass 
 () 
  
 { 
  
 // Configure the Autoclass setting for a bucket. 
  
 // terminalStorageClass field is optional and defaults to NEARLINE if not otherwise specified. 
  
 // Valid terminalStorageClass values are NEARLINE and ARCHIVE. 
  
 const 
  
 [ 
 metadata 
 ] 
  
 = 
  
 await 
  
 storage 
 . 
 bucket 
 ( 
 bucketName 
 ). 
 setMetadata 
 ({ 
  
 autoclass 
 : 
  
 { 
  
 enabled 
 : 
  
 toggle 
 , 
  
 terminalStorageClass 
 , 
  
 }, 
  
 }); 
  
 console 
 . 
 log 
 ( 
  
 `Autoclass terminal storage class is 
 ${ 
 metadata 
 . 
  autoclass 
 
 . 
 terminalStorageClass 
 } 
 .` 
  
 ); 
 } 
 setAutoclass 
 (). 
 catch 
 ( 
 console 
 . 
 error 
 );

PHP

For more information, see the Cloud Storage PHP API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  use Google\Cloud\Storage\StorageClient; 
 /** 
 * Updates an existing bucket with provided autoclass config. 
 * 
 * @param string $bucketName The name of your Cloud Storage bucket (e.g. 'my-bucket'). 
 * @param bool $autoclassStatus If true, enables Autoclass. Disables otherwise. 
 * @param string $terminalStorageClass This field is optional and defaults to `NEARLINE`. 
 *        Valid values are `NEARLINE` and `ARCHIVE`. 
 */ 
 function set_bucket_autoclass( 
 string $bucketName, 
 bool $autoclassStatus, 
 string $terminalStorageClass 
 ): void { 
 $storage = new StorageClient(); 
 $bucket = $storage->bucket($bucketName); 
 $bucket->update([ 
 'autoclass' => [ 
 'enabled' => $autoclassStatus, 
 'terminalStorageClass' => $terminalStorageClass 
 ], 
 ]); 
 $info = $bucket->info(); 
 printf( 
 'Updated bucket %s with autoclass set to %s.' . PHP_EOL, 
 $info['name'], 
 $autoclassStatus ? 'true' : 'false' 
 ); 
 printf( 
 'Autoclass terminal storage class is %s.' . PHP_EOL, 
 $info['autoclass']['terminalStorageClass'] 
 ); 
 }

Python

For more information, see the Cloud Storage Python API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  from 
  
 google.cloud 
  
 import 
  storage 
 
 def 
  
 set_autoclass 
 ( 
 bucket_name 
 ): 
  
 """Configure the Autoclass setting for a bucket. 
 terminal_storage_class field is optional and defaults to NEARLINE if not otherwise specified. 
 Valid terminal_storage_class values are NEARLINE and ARCHIVE. 
 """ 
 # The ID of your GCS bucket 
 # bucket_name = "my-bucket" 
 # Enable Autoclass for a bucket. Set enabled to false to disable Autoclass. 
 # Set Autoclass.TerminalStorageClass, valid values are NEARLINE and ARCHIVE. 
 enabled 
 = 
 True 
 terminal_storage_class 
 = 
 "ARCHIVE" 
 storage_client 
 = 
  storage 
 
 . 
  Client 
 
 () 
 bucket 
 = 
 storage_client 
 . 
  bucket 
 
 ( 
 bucket_name 
 ) 
 bucket 
 . 
  autoclass_enabled 
 
 = 
 enabled 
 bucket 
 . 
  autoclass_terminal_storage_class 
 
 = 
 terminal_storage_class 
 bucket 
 . 
 patch 
 () 
 print 
 ( 
 f 
 "Autoclass enabled is set to 
 { 
 bucket 
 . 
  autoclass_enabled 
 
 } 
 for 
 { 
 bucket 
 . 
 name 
 } 
 at 
 { 
 bucket 
 . 
  autoclass_toggle_time 
 
 } 
 ." 
 ) 
 print 
 ( 
 f 
 "Autoclass terminal storage class is 
 { 
 bucket 
 . 
  autoclass_terminal_storage_class 
 
 } 
 ." 
 ) 
 return 
 bucket

Ruby

For more information, see the Cloud Storage Ruby API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  require 
  
 "google/cloud/storage" 
 ## 
 # This is a snippet for showcasing how to set the autoclass 
 # configuration of a bucket. 
 # 
 # @param bucket_name [String] The ID of your GCS bucket (e.g. "your-unique-bucket-name") 
 # @param toggle [Boolean] if true, enables Autoclass; if false, disables Autoclass 
 # 
 def 
  
 set_autoclass 
  
 bucket_name 
 :, 
  
 toggle 
 :, 
  
 terminal_storage_class 
 : 
  
 nil 
  
 # Initialize client 
  
 storage 
  
 = 
  
 Google 
 :: 
 Cloud 
 :: 
  Storage 
 
 . 
  new 
 
  
 # Fetch the GCS bucket 
  
 bucket 
  
 = 
  
 storage 
 . 
 bucket 
  
 bucket_name 
  
 # Update the autoclass configuration 
  
 bucket 
 . 
  update_autoclass 
 
 ({ 
  
 enabled 
 : 
  
 toggle 
 , 
  
 terminal_storage_class 
 : 
  
 terminal_storage_class 
  
 }) 
  
 terminal_class_update_time 
  
 = 
  
 bucket 
 . 
  autoclass_terminal_storage_class_update_time 
 
  
 # Get autoclass config of the bucket 
  
 puts 
  
 "Bucket 
 #{ 
 bucket 
 . 
 name 
 } 
 has autoclass config set to 
 #{ 
 bucket 
 . 
  autoclass_enabled 
 
 } 
 ." 
  
 puts 
  
 "Bucket 
 #{ 
 bucket 
 . 
 name 
 } 
 has autoclass toggle time set to 
 #{ 
 bucket 
 . 
  autoclass_toggle_time 
 
 } 
 ." 
  
 puts 
  
 "Bucket 
 #{ 
 bucket 
 . 
 name 
 } 
 has autoclass terminal storage class set to 
 #{ 
 bucket 
 . 
  autoclass_terminal_storage_class 
 
 } 
 ." 
  
 puts 
  
 "Bucket 
 #{ 
 bucket 
 . 
 name 
 } 
 has autoclass terminal storage class update time set to 
 #{ 
 terminal_class_update_time 
 } 
 ." 
 end

REST APIs

JSON API

Have gcloud CLI installed and initialized , which lets you generate an access token for the Authorization header.
Create a JSON file that contains the following information:
```
 { 
  
 "storageClass" 
 : 
  
 " DEFAULT_CLASS 
" 
 , 
  
 "autoclass" 
 : 
  
 { 
  
 "enabled" 
 : 
  
  BOOLEAN 
 
 , 
  
 "terminalStorageClass" 
 : 
  TERMINAL_CLASS 
 
  
 } 
 } 
```
Where:
- DEFAULT_CLASS sets the storage class metadata for the bucket. When enabling Autoclass, STANDARD is the only valid value and is required if the bucket currently uses a different storage class.
- BOOLEAN is true to enable Autoclass or false to disable Autoclass.
- TERMINAL_CLASS is the terminal storage class to use when Autoclass is enabled.

Use cURL to call the JSON API with a PATCH Bucket request:

curl -X PATCH --data-binary @ JSON_FILE_NAME 
\
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
-H "Content-Type: application/json" \
"https://storage.googleapis.com/storage/v1/b/ BUCKET_NAME 
?fields=autoclass"

Where:

JSON_FILE_NAME is the path for the JSON file that you created in Step 2.
BUCKET_NAME is the name of the relevant bucket. For example, my-bucket .

XML API

This feature cannot be managed through the XML API. Use the Google Cloud console or another tool instead.

View a bucket's Autoclass status

To view the Autoclass status for an individual bucket:

Console

In the Google Cloud console, go to the Cloud Storage Buckets page.

Go to Buckets
Click the name of the bucket whose status you want to check.
Click the Configurationtab.
The status for Autoclass is displayed in the Default storage classfield.

If Autoclass is enabled, the field reads Managed with Autoclass, and the Included classesfield displays the storage classes that objects can transition between.

Command line

Use the gcloud storage buckets describe command with the --format flag:

gcloud storage buckets describe gs:// BUCKET_NAME 
--format="default(autoclass)"

Where BUCKET_NAME is the name of the bucket whose status you want to view. For example, my-bucket .

If successful, the response looks similar to the following example:

 au 
 t 
 oclass 
 : 
  
 e 
 na 
 bled 
 : 
  
 true 
  
 ter 
 mi 
 nal 
 S 
 t 
 orageClass 
 : 
  
 ARCHIVE 
  
 ter 
 mi 
 nal 
 S 
 t 
 orageClassUpda 
 te 
 Time 
 : 
  
 ' 
 2023-02-10 
 T 
 16 
 : 
 11 
 : 
 02.384000+00 
 : 
 00 
 ' 
  
 t 
 oggleTime 
 : 
  
 ' 
 2022-11-09 
 T 
 16 
 : 
 01 
 : 
 40.775000+00 
 : 
 00 
 '

Client libraries

C++

For more information, see the Cloud Storage C++ API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  namespace 
  
 gcs 
  
 = 
  
 :: 
 google 
 :: 
 cloud 
 :: 
 storage 
 ; 
 []( 
 gcs 
 :: 
 Client 
  
 client 
 , 
  
 std 
 :: 
 string 
  
 const 
&  
 bucket_name 
 ) 
  
 { 
  
 auto 
  
 metadata 
  
 = 
  
 client 
 . 
 GetBucketMetadata 
 ( 
 bucket_name 
 ); 
  
 if 
  
 ( 
 ! 
 metadata 
 ) 
  
 throw 
  
 google 
 :: 
 cloud 
 :: 
 Status 
 ( 
 std 
 :: 
 move 
 ( 
 metadata 
 ). 
 status 
 ()); 
  
 if 
  
 ( 
 ! 
 metadata 
 - 
> has_autoclass 
 ()) 
  
 { 
  
 std 
 :: 
 cout 
 << 
 "The bucket " 
 << 
 metadata 
 - 
> name 
 () 
 << 
 " does not have an" 
 << 
 " autoclass configuration. 
 \n 
 " 
 ; 
  
 return 
 ; 
  
 } 
  
 std 
 :: 
 cout 
 << 
 "Autoclass is " 
 << 
 ( 
 metadata 
 - 
> autoclass 
 (). 
 enabled 
  
 ? 
  
 "enabled" 
  
 : 
  
 "disabled" 
 ) 
 << 
 " for bucket " 
 << 
 metadata 
 - 
> name 
 () 
 << 
 ". " 
 << 
 " The bucket's full autoclass configuration is " 
 << 
 metadata 
 - 
> autoclass 
 () 
 << 
 " 
 \n 
 " 
 ; 
 }

C#

For more information, see the Cloud Storage C# API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  using 
  
  Google.Cloud.Storage.V1 
 
 ; 
 using 
  
 System 
 ; 
 using 
  
 static 
  
 Google 
 . 
 Apis 
 . 
 Storage 
 . 
 v1 
 . 
 Data 
 . 
 Bucket 
 ; 
 public 
  
 class 
  
 GetAutoclassSample 
 { 
  
 public 
  
 AutoclassData 
  
 GetAutoclass 
 ( 
 string 
  
 bucketName 
 ) 
  
 { 
  
 var 
  
 storage 
  
 = 
  
  StorageClient 
 
 . 
  Create 
 
 (); 
  
 var 
  
 bucket 
  
 = 
  
 storage 
 . 
 GetBucket 
 ( 
 bucketName 
 ); 
  
 Console 
 . 
 WriteLine 
 ( 
 $"Autoclass enabled is set to {bucket.Autoclass.Enabled} for {bucketName} at {bucket.Autoclass.ToggleTimeDateTimeOffset}." 
 ); 
  
 Console 
 . 
 WriteLine 
 ( 
 $"Autoclass terminal storage class is set to {bucket.Autoclass.TerminalStorageClass} for {bucketName} at {bucket.Autoclass.TerminalStorageClassUpdateTimeDateTimeOffset}." 
 ); 
  
 return 
  
 bucket 
 . 
 Autoclass 
 ; 
  
 } 
 }

Go

For more information, see the Cloud Storage Go API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  import 
  
 ( 
  
 "context" 
  
 "fmt" 
  
 "io" 
  
 "time" 
  
 "cloud.google.com/go/storage" 
 ) 
 // getAutoclass gets the Autoclass configuration for a bucket. 
 // See https://cloud.google.com/storage/docs/using-autoclass for more information. 
 func 
  
 getAutoclass 
 ( 
 w 
  
 io 
 . 
  Writer 
 
 , 
  
 bucketName 
  
 string 
 ) 
  
 error 
  
 { 
  
 // bucketName := "bucket-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 
 () 
  
 attrs 
 , 
  
 err 
  
 := 
  
 client 
 . 
  Bucket 
 
 ( 
 bucketName 
 ). 
 Attrs 
 ( 
 ctx 
 ) 
  
 if 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 fmt 
 . 
 Errorf 
 ( 
 "Bucket(%q).Attrs: %w" 
 , 
  
 bucketName 
 , 
  
 err 
 ) 
  
 } 
  
 fmt 
 . 
 Fprintf 
 ( 
 w 
 , 
  
 "Autoclass enabled was set to %v on bucket %q at %v" 
 , 
  
 attrs 
 . 
  Autoclass 
 
 . 
 Enabled 
 , 
  
 bucketName 
 , 
  
 attrs 
 . 
  Autoclass 
 
 . 
 ToggleTime 
 ) 
  
 fmt 
 . 
 Fprintf 
 ( 
 w 
 , 
  
 "Autoclass terminal storage class was last updated to %v at %v" 
 , 
  
 attrs 
 . 
  Autoclass 
 
 . 
 TerminalStorageClass 
 , 
  
 attrs 
 . 
  Autoclass 
 
 . 
 TerminalStorageClassUpdateTime 
 ) 
  
 return 
  
 nil 
 }

Java

For more information, see the Cloud Storage Java API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  import 
  
 com.google.cloud.storage. BucketInfo 
. Autoclass 
 
 ; 
 import 
  
 com.google.cloud.storage. Storage 
 
 ; 
 import 
  
 com.google.cloud.storage. StorageClass 
 
 ; 
 import 
  
 com.google.cloud.storage. StorageOptions 
 
 ; 
 import 
  
 java.time.OffsetDateTime 
 ; 
 public 
  
 class 
 GetBucketAutoclass 
  
 { 
  
 public 
  
 static 
  
 void 
  
 getBucketAutoclass 
 ( 
 String 
  
 projectId 
 , 
  
 String 
  
 bucketName 
 ) 
  
 { 
  
 // The ID of your GCP project 
  
 // String projectId = "your-project-id"; 
  
 // The ID of your GCS bucket 
  
 // String bucketName = "your-unique-bucket-name"; 
  
  Storage 
 
  
 storage 
  
 = 
  
  StorageOptions 
 
 . 
 newBuilder 
 (). 
 setProjectId 
 ( 
 projectId 
 ). 
 build 
 (). 
  getService 
 
 (); 
  
  Autoclass 
 
  
 autoclass 
  
 = 
  
 storage 
 . 
  get 
 
 ( 
 bucketName 
 ). 
  getAutoclass 
 
 (); 
  
 String 
  
 status 
  
 = 
  
 autoclass 
 . 
 getEnabled 
 () 
  
 ? 
  
 "enabled" 
  
 : 
  
 "disabled" 
 ; 
  
 String 
  
 toggleTime 
  
 = 
  
 autoclass 
 . 
  getToggleTime 
 
 (). 
 toString 
 (); 
  
  StorageClass 
 
  
 terminalStorageClass 
  
 = 
  
 autoclass 
 . 
  getTerminalStorageClass 
 
 (); 
  
 OffsetDateTime 
  
 terminalStorageClassUpdateTime 
  
 = 
  
 autoclass 
 . 
  getTerminalStorageClassUpdateTime 
 
 (); 
  
 System 
 . 
 out 
 . 
 println 
 ( 
  
 "Autoclass is currently " 
  
 + 
  
 status 
  
 + 
  
 " for bucket " 
  
 + 
  
 bucketName 
  
 + 
  
 " and was last changed at " 
  
 + 
  
 toggleTime 
  
 + 
  
 ". The terminal storage class is set to be " 
  
 + 
  
 terminalStorageClass 
 . 
  name 
 
 () 
  
 + 
  
 " last updated at " 
  
 + 
  
 terminalStorageClassUpdateTime 
 . 
 toString 
 ()); 
  
 } 
 }

Node.js

For more information, see the Cloud Storage Node.js API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  /** 
 * TODO(developer): Uncomment the following lines before running the sample. 
 */ 
 // The ID of your GCS bucket 
 // const bucketName = 'your-unique-bucket-name'; 
 // Imports the Google Cloud client library 
 const 
  
 { 
 Storage 
 } 
  
 = 
  
 require 
 ( 
 ' @google-cloud/storage 
' 
 ); 
 // Creates a client 
 const 
  
 storage 
  
 = 
  
 new 
  
 Storage 
 (); 
 async 
  
 function 
  
 getAutoclass 
 () 
  
 { 
  
 const 
  
 [ 
 metadata 
 ] 
  
 = 
  
 await 
  
 storage 
 . 
 bucket 
 ( 
 bucketName 
 ). 
 getMetadata 
 (); 
  
 console 
 . 
 log 
 ( 
  
 `Autoclass is 
 ${ 
  
 metadata 
 . 
  autoclass 
 
 . 
 enabled 
  
 ? 
  
 'enabled' 
  
 : 
  
 'disabled' 
  
 } 
 for 
 ${ 
 metadata 
 . 
 name 
 } 
 at 
 ${ 
 metadata 
 . 
  autoclass 
 
 . 
 toggleTime 
 } 
 . 
 Autoclass terminal storage class is last updated to 
 ${ 
  
 metadata 
 . 
  autoclass 
 
 . 
 terminalStorageClass 
  
 } 
 at 
 ${ 
 metadata 
 . 
  autoclass 
 
 . 
 terminalStorageClassUpdateTime 
 } 
 .` 
  
 ); 
 } 
 getAutoclass 
 (). 
 catch 
 ( 
 console 
 . 
 error 
 );

PHP

For more information, see the Cloud Storage PHP API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  use Google\Cloud\Storage\StorageClient; 
 /** 
 * Print a bucket autoclass configuration. 
 * 
 * @param string $bucketName The name of your Cloud Storage bucket (e.g. 'my-bucket'). 
 */ 
 function get_bucket_autoclass(string $bucketName): void 
 { 
 $storage = new StorageClient(); 
 $bucket = $storage->bucket($bucketName); 
 $info = $bucket->info(); 
 if (isset($info['autoclass'])) { 
 printf('Bucket %s has autoclass enabled: %s' . PHP_EOL, 
 $bucketName, 
 $info['autoclass']['enabled'] 
 ); 
 printf('Bucket %s has autoclass toggle time: %s' . PHP_EOL, 
 $bucketName, 
 $info['autoclass']['toggleTime'] 
 ); 
 printf( 
 'Autoclass terminal storage class is set to %s for %s at %s.' . PHP_EOL, 
 $info['autoclass']['terminalStorageClass'], 
 $info['name'], 
 $info['autoclass']['terminalStorageClassUpdateTime'], 
 ); 
 } 
 }

Python

For more information, see the Cloud Storage Python API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  from 
  
 google.cloud 
  
 import 
  storage 
 
 def 
  
 get_autoclass 
 ( 
 bucket_name 
 ): 
  
 """Get the Autoclass setting for a bucket.""" 
 # The ID of your GCS bucket 
 # bucket_name = "my-bucket" 
 storage_client 
 = 
  storage 
 
 . 
  Client 
 
 () 
 bucket 
 = 
 storage_client 
 . 
  get_bucket 
 
 ( 
 bucket_name 
 ) 
 autoclass_enabled 
 = 
 bucket 
 . 
  autoclass_enabled 
 
 autoclass_toggle_time 
 = 
 bucket 
 . 
  autoclass_toggle_time 
 
 terminal_storage_class 
 = 
 bucket 
 . 
  autoclass_terminal_storage_class 
 
 tsc_update_time 
 = 
 bucket 
 . 
  autoclass_terminal_storage_class_update_time 
 
 print 
 ( 
 f 
 "Autoclass enabled is set to 
 { 
  autoclass_enabled 
 
 } 
 for 
 { 
 bucket 
 . 
 name 
 } 
 at 
 { 
  autoclass_toggle_time 
 
 } 
 ." 
 ) 
 print 
 ( 
 f 
 "Autoclass terminal storage class is set to 
 { 
 terminal_storage_class 
 } 
 for 
 { 
 bucket 
 . 
 name 
 } 
 at 
 { 
 tsc_update_time 
 } 
 ." 
 ) 
 return 
 bucket

Ruby

For more information, see the Cloud Storage Ruby API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  require 
  
 "google/cloud/storage" 
 ## 
 # This is a snippet for showcasing how to access the autoclass 
 # configuration of a bucket. 
 # 
 # @param bucket_name [String] The ID of your GCS bucket (e.g. "your-unique-bucket-name") 
 # 
 def 
  
 get_autoclass 
  
 bucket_name 
 : 
  
 # Initialize client 
  
 storage 
  
 = 
  
 Google 
 :: 
 Cloud 
 :: 
  Storage 
 
 . 
  new 
 
  
 # Fetch the GCS bucket 
  
 bucket 
  
 = 
  
 storage 
 . 
 bucket 
  
 bucket_name 
  
 terminal_class_update_time 
  
 = 
  
 bucket 
 . 
  autoclass_terminal_storage_class_update_time 
 
  
 # Get autoclass config of the bucket 
  
 puts 
  
 "Bucket 
 #{ 
 bucket 
 . 
 name 
 } 
 has autoclass config set to 
 #{ 
 bucket 
 . 
  autoclass_enabled 
 
 } 
 ." 
  
 puts 
  
 "Bucket 
 #{ 
 bucket 
 . 
 name 
 } 
 has autoclass toggle time set to 
 #{ 
 bucket 
 . 
  autoclass_toggle_time 
 
 } 
 ." 
  
 puts 
  
 "Bucket 
 #{ 
 bucket 
 . 
 name 
 } 
 has autoclass terminal storage class set to 
 #{ 
 bucket 
 . 
  autoclass_terminal_storage_class 
 
 } 
 ." 
  
 puts 
  
 "Bucket 
 #{ 
 bucket 
 . 
 name 
 } 
 has autoclass terminal storage class update time set to 
 #{ 
 terminal_class_update_time 
 } 
 ." 
 end

REST APIs

JSON API

Have gcloud CLI installed and initialized , which lets you generate an access token for the Authorization header.

Use cURL to call the JSON API with a GET Bucket request that includes the autoclass field:

curl -X GET -H "Authorization: Bearer $(gcloud auth print-access-token)" \
"https://storage.googleapis.com/storage/v1/b/ BUCKET_NAME 
?fields=autoclass"

Where BUCKET_NAME is the name of the relevant bucket. For example, my-bucket .

If the bucket has Autoclass enabled, the response looks like the following example:

 { 
  
 "autoclass" 
 : 
  
 { 
  
 "enabled" 
 : 
  
 " BOOLEAN 
" 
 , 
  
 "toggleTime" 
 : 
  
 " DATETIME 
" 
 , 
  
 "terminalStorageClass" 
 : 
  
 " STORAGE_CLASS 
" 
 , 
  
 "terminalStorageClassUpdateTime" 
 : 
  
 " DATETIME 
" 
  
 }, 
 }

XML API

This feature cannot be managed through the XML API. Use the Google Cloud console or another tool instead.

What's next

Learn more about Autoclass .
Learn about Object Lifecycle Management , which automatically changes an object's storage class when it meets criteria you specify.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License , and code samples are licensed under the Apache 2.0 License . For details, see the Google Developers Site Policies . Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-09-04 UTC.

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