Consolidation of 2 Jira cloud instances - race condition and performance

Marcin Olszewski_x9g6di

Hi,

 I've 2 technical questions related to Atlassian cloud to cloud migration tool. It is now recommended as a tool for consolidation of cloud instances so I think it is important to know how it works.

The questions:

1) Migration from Atlassian cloud to Atlassian cloud in many threads (separate migrations triggered at the same time, the same source, the same destination, different projects that share the same common entities like custom fields or workflows) - Is there a possibility that it will create duplicated common entities due to race condition of many migration threads run in parallel? 

2) Is triggering multiple migrations from the same source instance to the same destination instance on different projects causing degradation in overall performance of all triggered migrations? (e.g. Will migrations run one by one, will take the same or shorter time compared to migrations run in parallel)