This topic describes the serverless instance classes.
Usage notes
Data Transmission Service (DTS) can synchronize data to the destination instance within seconds. However, synchronization latency may increase due to various reasons, such as the high workload of the source instance, the low bandwidth of the transmission network, the network latency, and the poor write performance of the destination instance. Therefore, DTS does not guarantee latency in seconds for data synchronization tasks.
Terms
Term | Description |
DTS unit (DU) | The measurement unit of resources available to serverless instance classes, including CPU, memory, and disk space. |
Rows per second (RPS) | The rows of data that are incrementally synchronized to the destination table per second. For example, if a serverless instance incrementally synchronizes 5,000 rows of data to the destination table per second, the RPS of the instance is 5,000. |
Instance classes
The following table describes the mapping between the number of DUs and maximum RPS of serverless instances. The actual RPS may vary based on factors such as the network environment, performance of the source and destination databases, and latency.
DUs | Maximum RPS |
1 | 200 |
2 | 1,000 |
4 | 3,000 |
8 | 9,000 |
16 | 17,000 |
32 | 35,000 |
The actual RPS of a serverless instance varies based on various factors, such as the network environment, the performance of the source and destination databases, and the latency. The maximum RPS listed in the preceding table is only for reference and is not covered by the service-level agreement (SLA) of DTS.