How Do I Measure the Network Performance Before the Migration?

Background

Poor network performance may prolong the migration or cause migration failures. SMS can help you measure the network performance before the migration.

• It takes 4 to 5 minutes to complete the measurement. To accurately measure the network performance, the migration rate limits you configure are not applied during the measurement, and more network resources may be used. You are advised to evaluate the actual resource usage on the source server to ensure that your services run properly.
• You must make sure that inbound ICMP traffic is allowed in the security group of the target server.

Procedure

You can measure the network performance when:

• You create a migration task.

  On the Configure Basic Settings tab page, expand Migration Settings (Optional), set Measure Network Performance to Yes. During the full migration, SMS will generate a subtask called Measure the network performance.

  Figure 1 Determining whether to measure the network performance.
  
  Figure 2 The subtask for measuring the network performance
  

• An error was reported during the subtask for migrating data, synchronizing data, or modifying configuration, or such a subtask was paused.

  You can choose More > Manage Migration Settings > Measure Network Performance in the Operation column.

Measurement Results

During the network performance measurement, the system will check whether the source server can connect to the target server and related cloud services, such as IMS, ECS, EVS, and VPC, using their domain names In addition, it measures four core network metrics: packet loss rate, jitter, network latency, and bandwidth, as well as two factors that indirectly affect network performance: memory usage and CPU usage. The measurement results are displayed in green, orange, and red, which indicate good, medium, and poor respectively. After the measurement is complete, SMS will display how well your network is performing and estimate how long the migration will take.

• The evaluation result represents only the network performance during the test.
• The migration duration is estimated when the migration rate limits are not applied and is for reference only. In addition to the migration network, the migration duration is affected by many other factors, such as the number of small files on the source server, network fluctuation, disk read/write speed, and network traffic limit. A more reliable indicator is the remaining migration time displayed in the task list.