[idea] native support for multiple clusters

[jan-janssen]

Currently, switching between clusters is a manual task:

qa = QueueAdapter()
qa.list_clusters()
>>> 'cluster_1', 'cluster_2'
qa.switch_cluster(cluster_name='cluster_1')
qa.submit_job(...)

It would be great if pysqa could switch between the clusters seamlessly. Basically by selecting the queue pysqa could automatically identify which cluster is used so that the different cluster behave like one to the user.

There are a couple of challenges:

• Two clusters could potentially return the same queue ID. The current approach is to add an integer at the end of the queue ID which limits the number of clusters to 10.
• The other issue is that getting the status of all clusters increases linearly with the number of clusters. This could be executed in parallel, still that would only be more complex.