DataService Studio on the IoT Platform offers a data storage feature for storing device time series data, including Thing Specification Language (TSL) data (properties, services, and events) reported by devices, as well as custom topic data defined by time series data storage rules. This topic provides an introduction to the concepts and application of time series data storage.
Related Concepts
Term | Description |
Time Series Data Storage IOPS | Refers to the total number of data rows that can be read from and written to per second. Note Each property, service, or event is counted as one data row. A message containing multiple properties, services, or events will result in multiple data rows. By default, each instance is allocated 100 IOPS. You can select the appropriate IOPS based on your business requirements when purchasing or upgrading an instance. IOPS is typically split into 90% for writes and 10% for reads. For instance, with 1,000 IOPS, the maximum writes would be 900, and reads would be 100. Write and read IOPS for time series data are tallied separately. You can adjust the IOPS ratio to suit your business needs, but the read ratio must not exceed 50%. |
Time Series Data Storage Space | All device-related TSL data and data defined by time series data storage rules are stored in a unified storage space on the IoT Platform. Each instance comes with 1 GB of storage space by default. Additional space can be selected to meet your business needs during purchase or upgrade. The storage capacity for all time series data is aggregated. |
Feature Description
In regions such as China (Shanghai), China (Beijing), China (Shenzhen), Japan (Tokyo), Singapore, and US (Virginia), the time series data storage feature is supported by instances of the Enterprise IoT Platform. For a detailed description of instances, see Differences in Types and Features of Enterprise Edition Instances.
Reporting and querying device time series data are subject to IOPS and storage space limits.
The default retention period for time series data is 365 days.
Limits
Limit Item | Description | Limit |
Time Series Data Storage Rules | The maximum number of rules per instance for storing time series data. | 1,000 |
Custom Topic | The maximum number of topics that can be defined under a single rule. | 1,000 |
Usage Instructions
Acquire the necessary IOPS and storage space for time series data according to your needs. For more information, see Purchase Enterprise Edition Instances.
By default, device-reported TSL data is automatically stored. You can disable this feature for specific TSL data under a particular product.
To store device-reported custom topic data, you must manually create time series data storage rules.
Utilize the relevant APIs to write and query device time series data. For a list of specific APIs, see:
API
Description
Write custom topic data to time series data storage.
Query the status of device time series data snapshots.
Query stored device time series data.
DataService Studio automatically cleans up expired time series data based on the default expiration limit. You can modify the data retention period as needed.
Monitor the resource usage of time series data IOPS and storage space under your instance and configure alert rules accordingly.