Note:
We started the beta test of the metadata acceleration feature for Cloud Object Storage (COS) users in March 2022. The beta test will officially end at 00:00:00 (UTC+8) on January 1, 2024, and commercial billing for the metadata acceleration feature will then begin. Your account can continue to enjoy this feature for free until then. Following that, you will be charged on a pay-as-you-go basis. For more information, refer to the content below.
Metadata Acceleration is a high-performance file system feature offered by COS. It leverages the powerful metadata management feature of Cloud HDFS (CHDFS) at the underlying layer to allow you to access COS over file system semantics. It can increase the bandwidth to 100 GB/s, improve QPS to over 100,000, and reduce the latency to the millisecond level. If you use the metadata acceleration feature, corresponding fees will be charged. Billing Overview
Metadata acceleration fees are calculated based on the quantity and retention duration of directories and files in the metadata acceleration bucket created by the user. The details are as follows:
Billing Item | Billing Item Description | Applicable Region | Billing Mode |
Metadata acceleration fees | Fees charged to the user for using the metadata acceleration feature, which are calculated based on the quantity and retention duration of directories and files. | Chinese mainland: Beijing, Shanghai, Guangzhou, Nanjing, Chengdu, and Chongqing Hong Kong (China) and outside Chinese mainland: Hong Kong (China), Singapore, Frankfurt, Silicon Valley (West US), and Virginia (East US) | Pay-as-you-go |
Billing Mode and Calculation Formulas
Metadata acceleration is billed on a pay-as-you-go basis. The calculation method is as follows:
Applicable Billing Item | Billing Mode | Calculation Formula |
Metadata acceleration fees | Pay-as-you-go | Daily settlement Daily metadata acceleration fees = ((Quantity of daily directories + Quantity of daily files) / 10,000) × Metadata acceleration unit price Quantity of daily directories = Sum of 5-minute directories in metadata acceleration bucket for the day / 288 (quantity of sampling points) Quantity of daily files = Sum of 5-minute files in metadata acceleration bucket for the day / 288 (quantity of sampling points) |
Note:
288 (quantity of sampling points) represents the number of 5-minute intervals within 24 hours, with the statistical period being 00:00:00–23:59:59. Sampling is conducted 288 times.
Pricing
Metadata acceleration fees have nothing to do with storage classes and are calculated only based on the quantity and retention duration of directories and files in the metadata acceleration bucket. The specific prices are as follows according to regions:
Region | Metadata Acceleration Price (USD/10,000 directories and files/day) |
Beijing, Shanghai, Guangzhou, Nanjing, Chengdu, and Chongqing | 0.0014 |
Hong Kong (China), Singapore, Frankfurt, Silicon Valley (West US), and Virginia (East US) | 0.0019 |
Billing Examples
Example: Creating a Directory and Uploading Files
Assume that at 00:00:00 (UTC+8) on January 1, 2024, user A creates a metadata acceleration bucket in the Beijing region and a new directory new_folder/
. Then, the user uploads 20,000 files to the directory. These operations are completed at 00:04:00 (UTC+8) on January 1, 2024, and the user performs no other operations.
In the pay-as-you-go mode, the fee calculation is as follows:
Quantity of daily directories = (0 directories × 1 sampling point + 1 directory × 287 sampling points) / 288 sampling points = 0.99653
Quantity of daily files = (0 files × 1 sampling point + 20,000 files × 287 sampling points) / 288 sampling points = 19,930.55556
Daily metadata acceleration fees = ((0.99653 directories + 19,930.55556 files) / 10,000) × 0.0014 USD = 0.00279 USD
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