Commencing from January 2021, the individual performance of the Enhanced SSD Cloud Disk is composed of both Basic Performance and Extra Performance.
Basic performance varies linearly with cloud disk capacity and reaches the maximum value at the critical point.
If you have a higher performance requirement, you can enable and configure extra performance.
This document introduces basic performance and extra performance.
Overall Performance
The performance of each Enhanced SSD Cloud Disk is composed of both Basic Performance and Extra Performance. Regardless of the allocation, the current performance of the Enhanced SSD Cloud Disk follows these rules:
Performance of Enhanced SSD Cloud Disk | Maximum value |
Random IOPS | 100000 |
Maximum throughput (MB/s) | 1000 |
Basic Performance
For the Enhanced SSD Cloud Disk, the basic performance varies linearly with capacity and cannot be adjusted independently. The calculation formula is as follows:
Basic Performance | Basic Performance Calculation Formula | Maximum Basic Performance |
Basic Performance - Random IOPS | Min{1800 + Capacity in GB x 50, 50,000} | 50000 |
Basic Performance - Maximum Throughput (MB/s) | Min{120 + Capacity in GB x 0.5, 350} | 350 |
According to the formula,
Upon reaching a capacity of 460GB, the throughput limit is first achieved. At this point, the basic performance values are: 24,800 Random IOPS, with a maximum throughput of 350MB/s.
Upon reaching a capacity of 964GB, the random IOPS limit is achieved. At this point, the basic performance values are: 50,000 random IOPS, with a maximum throughput of 350MB/s.
Extra Performance
If you have a higher performance requirement, you can enable extra performance.
Preparations
The following requirements must be met to enable extra performance:
Currently, only Enhanced SSD and ulTra SSD support extra performance. Other types of cloud disks do not support this feature.
Extra performance can only be configured once any aspect of the basic performance reaches its maximum value. According to the basic performance calculation formula, it is only supported when the capacity is > 460GB.
Extra performance formula
Refer to the following formula to configure the extra performance.
Extra Performance | Extra performance formula | Maximum Extra Performance |
Extra Performance - Random IOPS | Min{Configured Value × 128, 50,000} | 50000 |
Extra Performance - Maximum throughput (MB/s) | Min{Configured Value × 1, 650} | 650 |
Extra performance price
Sample
Example 1: Enhanced SSD Cloud Disk, with a capacity requirement of 2000GB and a throughput requirement of 500MB/s.
From the basic performance description, it is clear that the configured capacity has reached the upper limit of basic performance (throughput). To meet the demand, an additional performance of (500-350)/1 = 150 needs to be purchased. Therefore, the overall configuration to be purchased is: 2000GB Enhanced SSD Cloud Disk, with an additional performance configuration of 150.
Example Two: Enhanced SSD Cloud Disk, with a capacity requirement of 1000GB and an IOPS requirement of 50000.
From the basic performance description, it is known that the configuration capacity has reached the upper limit of basic performance (random IOPS). However, if the user does not require additional IOPS performance, there is no need to configure extra performance. Therefore, the overall configuration to be purchased is: 1000GB Enhanced SSD Cloud Disk, with no extra performance.