Overview - INTELLIGENT TIERING

Last updated: 2022-01-17 12:31:17

    Overview

    INTELLIGENT TIERING is a COS storage class designed to reduce storage costs by automatically moving objects between two storage tiers (frequent access and infrequent access) when access patterns change.

    INTELLIGENT TIERING is ideal for data with unknown or changing access patterns. It offers the same low latency and high throughput as STANDARD while featuring lower costs. Users can change the storage class of objects with uncertain access patterns from STANDARD to INTELLIGENT TIERING as needed to reduce in-cloud storage costs.

    Note:

    • Currently, INTELLIGENT TIERING is only available for the Beijing, Shanghai, Guangzhou, and Chongqing, and Tokyo regions.
    • INTELLIGENT TIERING is a standalone storage class that will incur storage usage fees. For detailed pricing, please see Product Pricing.

    Advantages

    The access patterns of data stored in INTELLIGENT TIERING will be monitored. COS moves objects that have not been accessed for a continuous period to the lower-cost infrequent access tier. If an object in the infrequent access tier is accessed later, it is automatically moved back to the frequent access tier to ensure the data retrieval performance. INTELLIGENT TIERING manages to strike a balance between storage costs and read/write performance and features the following strengths:

    • Cost-effective: When you use INTELLIGENT TIERING for persistent storage, the longer your data is stored, the more you can save on your storage costs (up to about 20%) compared with the STANDARD storage class. INTELLIGENT TIERING is also involved in the object storage lifecycle, where you can transition your INTELLIGENT TIERING data to ARCHIVE to further lower storage costs.
    • Stable and durable: INTELLIGENT TIERING provides the same low latency and high throughput as the STANDARD storage class. It also offers a reliability of up to 99.999999999% (11 9s) by using erasure code to achieve redundancy, and up to 99.95% availability by using block storage and concurrent reads/writes.
    • Easy-to-use: To use INTELLIGENT TIERING, all you need to do is specify it as the storage class of your object. This COS storage class is inherently compatible with COS APIs, SDKs, tools, and applications, making it easy for you to manage your in-cloud data as needed.

    Directions

    To store your object in the COS INTELLIGENT TIERING storage class, enable INTELLIGENT TIERING for the bucket, and then specify the storage class of your object as INTELLIGENT TIERING.

    Using COS console

    Setting INTELLIGENT TIERING upon object uploads

    You can perform the following steps to store your object in the INTELLIGENT TIERING storage class:

    1. On the bucket configuration page, enable INTELLIGENT TIERING. For more information on the process of enabling INTELLIGENT TIERING, please see Setting INTELLIGENT TIERING.
    2. Upload a file and specify the storage class during the upload. For more information about how to upload a file, please see Uploading Objects.
    Note:

    Once INTELLIGENT TIERING is enabled for a bucket, it cannot be disabled.

    Moving in-cloud objects to INTELLIGENT TIERING

    You can perform the following steps to move in-cloud objects to the INTELLIGENT TIERING storage class:

    1. On the bucket configuration page, create a lifecycle rule. For detailed directions, please see Setting Lifecycle.
    2. Specify the application range and transition objects to INTELLIGENT TIERING.

    Using REST APIs

    You can use the following APIs to configure INTELLIGENT TIERING:

    1. Use RESTful APIs to enable INTELLIGENT TIERING for your bucket. For more information, please see the following API documents:
    2. After enabling INTELLIGENT TIERING for the bucket, use the following APIs to store the object in the INTELLIGENT TIERING storage class:
    3. You can use the following APIs to query the storage class or storage tier of an object:
    4. You can use the following RESTful APIs to delete objects in the INTELLIGENT TIERING storage class:

    Using SDKs

    Currently, all SDKs that COS releases support INTELLIGENT TIERING. To support INTELLIGENT TIERING, you can set StorageClass to INTELLIGENT_TIERING when uploading a file. For more information, please see SDK Overview.

    Usage Limits

    INTELLIGENT TIERING has the following limits:

    • Configuration limit: Once configured, INTELLIGENT TIERING cannot be modified. If you need modification, please contact us.
    • Initial storage tier: A new object is stored in the frequent access tier by default, and will only be moved to the infrequent access tier if it hasn’t been accessed for a certain period.
    • Minimum storage duration: If an object is stored in the INTELLIGENT TIERING storage class for fewer than 30 days, you will be billed for 30 days.
    • Minimum storage size: An object smaller than 64 KB can only be stored in the frequent access tier and cannot be moved between the frequent and infrequent access tiers. Objects are billed based on their actual sizes.
    • Operation: Uploading objects to INTELLIGENT TIERING using the APPEND Object API is not supported.
    • Lifecycle: Objects in the INTELLIGENT TIERING storage class can only be transitioned to ARCHIVE or DEEP ARCHIVE. If a STANDARD object is transitioned to INTELLIGENT TIERING, it will be stored in the frequent access tier. If a STANDARD_IA object is transitioned to INTELLIGENT TIERING, it will be stored in the infrequent access tier.
    • Bucket replication: During bucket replication, if INTELLIGENT TIERING is not enabled for the destination bucket, the object cannot be copied to the INTELLIGENT TIERING storage class.

    FAQs

    How is INTELLIGENT TIERING billed?

    INTELLIGENT TIERING fees include INTELLIGENT TIERING storage usage fees and INTELLIGENT TIERING object monitoring fees.

    1. INTELLIGENT TIERING storage usage fees are charged differently depending on the storage tier of objects.
      • When objects are stored in the frequent access tier, STANDARD storage usage fees are charged.
      • When objects are stored in the infrequent access tier, STANDARD_IA storage usage fees are charged.
        Note:

    2. INTELLIGENT TIERING object monitoring fees are charged based on the number of objects stored. 0.025 USD is charged per 10,000 monitored objects per month.

    Example

    Assume that an organization has 1 TB objects, 100,000 objects in total (10 MB per object), and the data is stored in the INTELLIGENT TIERING storage class in the Beijing region. If 20% of the objects (i.e., 20,000 objects) transition to the infrequent access tier every month, the object monitoring fees and storage usage fees for each month will be as follows:

    Month Object Monitoring Fees (USD) INTELLIGENT TIERING Storage Usage Fees (USD) STANDARD Storage Usage Fees (USD)
    1 0.25 1024 x 0.024 = 24.58 1024 x 0.024 = 24.58
    2 0.25 819.2 x 0.024 + 204.8 x 0.018 = 23.35 1024 x 0.024 = 24.58
    3 0.25 655.36 x 0.024 + 368.64 x 0.018 = 22.36 1024 x 0.024 = 24.58
    4 0.25 524.288 x 0.024 + 499.712 x 0.018 = 21.58 1024 x 0.024 = 24.58
    5 0.25 419.4304 x 0.024 + 604.5696 x 0.018 = 20.95 1024 x 0.024 = 24.58
    6 0.25 335.54432 x 0.024 + 688.45568 x 0.018 = 20.45 1024 x 0.024 = 24.58

    As you can see, using INTELLIGENT TIERING reduces storage costs over time. Only a small amount of monitoring cost is required each month.

    What types of objects is INTELLIGENT TIERING suitable for?

    INTELLIGENT TIERING is suitable for large objects (such as audio and video, logs, etc.) whose access patterns change. Larger average object sizes mean you pay less for monitoring per GB objects. If your business has relatively fixed data access patterns, you can set lifecycle configuration to specify the time to transition objects to STANDARD_IA without the need to use INTELLIGENT TIERING.

    How can I store objects in INTELLIGENT TIERING?

    You can store objects in INTELLIGENT TIERING as follows:

    • Incremental objects: You just need to specify the storage class as INTELLIGENT TIERING when uploading the objects.
    • Existing objects: You can modify the storage class to INTELLIGENT TIERING using the COPY API. You can also use the lifecycle feature to transition STANDARD or STANDARD_IA objects to INTELLIGENT TIERING.
    Note:

    INTELLIGENT TIERING has a minimum storage object size of 64 KB. Therefore, objects smaller than 64 KB will always be stored in STANDARD. For objects smaller than 64 KB, we recommend you upload them to the STANDARD, STANDARD_IA, ARCHIVE, or DEEP_ARCHIVE storage class as needed to reduce costs.

    How do I disable INTELLIGENT TIERING configuration?

    INTELLIGENT TIERING configuration can't be disabled once enabled. If you don't need to store your objects in INTELLIGENT TIERING, you just need to specify the storage class as a non-INTELLIGENT TIERING class such as STANDARD, STANDARD_IA, ARCHIVE, or DEEP_ARCHIVE when uploading the objects.