SystemDisk - E-MapReduce - Alibaba Cloud Documentation Center

Parameter	Type	Description	Example
	object
Category	string	The disk type. Valid values: cloud_efficiency: ultra disk cloud_ssd: standard SSD cloud_essd: enhanced SSD cloud: basic disk	cloud_essd
Size	integer	The size. Unit: GB.	60
PerformanceLevel	string	The performance level of the ESSD that is used as the system disk. Valid values: PL0: A single ESSD can provide up to 10,000 random read/write IOPS. PL1: A single ESSD can provide up to 50,000 random read/write IOPS. PL2: A single ESSD can provide up to 100,000 random read/write IOPS. PL3: A single ESSD can provide up to 1,000,000 random read/write IOPS. Default value: PL1.	PL1
Count	integer	The number of system disks on each node. Default value: 1.	1