Dynamically increasing performance of a virtual storage appliance that uses multi-attach cloud storage volumes

A system comprising:

• a virtual storage appliance executing on a cloud computing platform, wherein the virtual storage appliance includes program code;
• wherein the program code, when executed by computing resources of the cloud computing platform including at least one central processing unit, causes the computing resources to:
• directly attach a plurality of cloud storage volumes to data storage interfaces of a plurality of storage controllers of the virtual storage appliance, and initially access the cloud storage volumes by the storage controllers of the virtual storage appliance through the data storage interfaces of the storage controllers, and
• in response to detecting a low performance condition for the virtual storage appliance, cause the computing resources to:
• create a virtual disk instance,
• directly attach the cloud storage volumes to the virtual disk instance,
• create a sub-network that connects the virtual disk instance to network interfaces of the storage controllers of the virtual storage appliance, and
• subsequently access the cloud storage volumes, by the storage controllers of the virtual storage appliance, through both the data storage interfaces and the network interfaces of the storage controllers of the virtual storage appliance, to persistently store host data received by the virtual storage appliance from one or more host devices in the cloud storage volumes.

A computer program product including a non-transitory computer readable medium having instructions stored thereon, wherein the instructions, when executed on processing circuitry, cause the processing circuitry to perform steps including:

• directly attaching a plurality of cloud storage volumes to data storage interfaces of a plurality of storage controllers of a virtual storage appliance, and initially accessing the cloud storage volumes by the storage controllers of the virtual storage appliance through the data storage interfaces of the storage controllers;
• and
• in response to detecting a low performance condition for the virtual storage appliance:
• creating a virtual disk instance,
• directly attaching the cloud storage volumes to the virtual disk instance,
• creating a sub-network that connects the virtual disk instance to network interfaces of the storage controllers of the virtual storage appliance, and
• subsequently accessing the cloud storage volumes, by the storage controllers of the virtual storage appliance, through both the data storage interfaces and the network interfaces of the storage controllers of the virtual storage appliance, to persistently store host data received by the virtual storage appliance from one or more host devices in the cloud storage volumes.