Concepts

Last updated: 2020-06-10 17:51:13

    Bucket

    A bucket is an entity for objects, which can be considered as a "container" for stored objects. You can manage buckets and configure their attributes through various methods such as the Tencent Cloud Console, APIs, and SDKs. For example, you can configure a bucket for static website hosting or access permission.

    For more information, see Bucket Overview.

    Object

    An object is the basic unit of COS and is stored in a bucket just like a photo stored in an album. You can manage objects in different ways including Tencent Cloud Console, APIs, and SDKs. An object is named in the format of <ObjectKey> in API and SDK examples.

    For more information, see Object Overview.

    APPID

    APPID is an application ID which you get after you successfully signed up to Tencent Cloud, and which has a unique one-to-one correspondence with your account ID. It is automatically assigned to you as a permanent unique ID, which can be viewed in Account Information.

    APPID is usually used in bucket names in a format of “custom string-APPID”, for example, examplebucket-1250000000.

    UID

    APPID is also used to generate temporary keys, specify bucket policies, or specify a resource range for policy configuration in CAM. In these cases, APPID is also referred to as UID that shares the same value as APPID.

    For more information, see Bucket Overview, Access Policy Language Overview, and Resource Description Method.

    UIN

    Account ID, a permanent unique ID that has a unique one-to-one correspondence with your APPID, and can be viewed in Account Information. In COS services, it is used to generate temporary keys, specify bucket policies, or specify a resource range for policy configuration in CAM, in ways similar to those for UID, but with a notable difference in their prefixes.

    For more information, see Access Policy Language Overview, and Resource Description Method.

    ACL

    An access control list (ACL) is a resource-based option for access management, and is used to describe an access permission action.
    In COS, you can use ACLs to manage the access to your buckets and objects by granting Read and Write permissions to other root accounts, sub-accounts and user groups.

    For more information, see Basic Concepts of Access Control, and ACL Overview.

    CORS

    Cross-Origin Resource Sharing (CORS), which means that a resource in one domain initiates an HTTP request to a resource from another domain.

    SecretKey

    SecretId and SecretKey are collectively referred to as cloud API key, which is the security credential used for authentication when a user accesses a Tencent Cloud API, and obtained in API Key Management. SecretKey is the key used to encrypt the signature string and the server-side authentication signature string. Multiple cloud API keys can be created under an APPID.

    SecretId

    SecretId and SecretKey are collectively referred to as the cloud API key, which is the security credential used for authentication when a user accesses a Tencent Cloud API, and obtained in API Key Management. SecretId is used to identify the API caller. Multiple cloud API keys can be created under an APPID.

    Policy

    A policy is comprised of several elements used to describe permission details. For more information, see Access Policy Language Overview.

    Public network downstream traffic

    Traffic of data transfer from COS to a client over the Internet. It includes the traffic generated when you download objects using object URLs or browse objects through your static website origin server.

    CDN origin-pull traffic

    Traffic generated by data transfer from COS to Tencent Cloud CDN edge server

    Default domain name

    Domain name of COS origin server. It is automatically generated based on your bucket name and region when you create a bucket, and should be distinguished from the default acceleration domain name. For more information, see Domain Name Management Overview.

    Default CDN acceleration domain name

    A domain name accelerated by CDN cache nodes. It is generated by default, and you can choose to enable or disable it. For more information, see Domain Name Management Overview.

    Custom CDN acceleration domain name

    A custom domain name that you bind for your bucket to the Tencent Cloud CDN acceleration platform, and use to access objects in your bucket. For more information, see Domain Name Management Overview.

    Custom origin server domain name

    A custom domain name that you bind to your bucket and use to access objects in it. For more information, see Domain Name Management Overview.

    Data retrieval

    STANDARD_IA and ARCHIVE are two COS storage classes that store cold data. To read or download infrequently-accessed data, COS needs to retrieve it first. Archived data cannot be read or downloaded until you unfreeze (retrieve) it, that is, restore it to STANDARD storage class first.

    MAZ

    MAZ is a storage architecture based on multiple availability zones (AZ) in Tencent Cloud COS. Your data is scattered among multiple IDCs in a region. When an IDC fails due to extreme situations such as natural disasters or power failures, the MAZ storage architecture can still provide stable and reliable storage services.

    For more information, see MAZ Features Overview.

    Region

    A region where Tencent Cloud data centers are hosted, and where you store your COS data in your bucket.

    For more information, see Regions and Access Domain Names.

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