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Setting or Obtaining the Storage Class of a Bucket

OBS allows you to set storage classes for buckets. The storage class of an object defaults to be that of its residing bucket. There are three types of storage class for buckets, as described in the following table, catering to various storage performance and cost requirements.

Storage Class

Description

Enumeration Value in OBS iOS SDK

OBS Standard

Features low access latency and high throughput and is applicable to storing frequently-accessed (multiple times per month) hotspot or small objects (< 1 MB) requiring quick response.

OBSStorageClassStandard

OBS Infrequent Access

Is applicable to storing semi-frequently accessed (less than 12 times a year) data requiring quick response.

OBSStorageClassStandardIA

OBS Archive

Is applicable to archiving rarely-accessed (once a year) data.

OBSStorageClassGlacier

For more information, see Bucket Storage Classes.

Setting the Storage Class for a Bucket

You can call setBucketStoragePolicy to set the storage class for a bucket. Sample code is as follows:

static OBSClient *client;
NSString *endPoint = @"your-endpoint";
NSString *SK = @"*** Provide your Secret Key ***";
NSString *AK = @"*** Provide your Access Key ***";
    
// Initialize identity authentication.
OBSStaticCredentialProvider *credentialProvider = [[OBSStaticCredentialProvider alloc] initWithAccessKey:AK secretKey:SK];
    
//Initialize service configuration.
OBSServiceConfiguration *conf = [[OBSServiceConfiguration alloc] initWithURLString:endPoint credentialProvider:credentialProvider];
    
// Initialize an instance of OBSClient.
client = [[OBSClient alloc] initWithConfiguration:conf];
    
// Set the storage class to OBS Standard.
OBSStoragePolicy* policy = [[OBSStoragePolicy alloc]initWithStorageClass:OBSStorageClassStandard];
    
// Set the storage class for a bucket.
OBSSetBucketStoragePolicyRequest *request = [[OBSSetBucketStoragePolicyRequest alloc]initWithBucketName:@"bucketname" storagePolicy:policy];
    
[client setBucketStoragePolicy:request completionHandler:^(OBSSetBucketStoragePolicyResponse *response, NSError *error){
    NSLog(@"%@",response);
}];

Obtaining the Storage Class of a Bucket

You can call getBucketStoragePolicy to obtain the storage class of a bucket. Sample code is as follows:

static OBSClient *client;
NSString *endPoint = @"your-endpoint";
NSString *SK = @"*** Provide your Secret Key ***";
NSString *AK = @"*** Provide your Access Key ***";
    
// Initialize identity authentication.
OBSStaticCredentialProvider *credentialProvider = [[OBSStaticCredentialProvider alloc] initWithAccessKey:AK secretKey:SK];
    
//Initialize service configuration.
OBSServiceConfiguration *conf = [[OBSServiceConfiguration alloc] initWithURLString:endPoint credentialProvider:credentialProvider];
    
// Initialize an instance of OBSClient.
client = [[OBSClient alloc] initWithConfiguration:conf];
    
// Obtain the storage class of a bucket.
OBSGetBucketStoragePolicyRequest *request = [[OBSGetBucketStoragePolicyRequest alloc]initWithBucketName:@"bucketname"];
    
[client getBucketStoragePolicy:request completionHandler:^(OBSGetBucketStoragePolicyResponse *response, NSError *error){
    NSLog(@"%@",response.storagePolicy);
}];
Parent topic: Bucket Management