Performance of one task (/390 server)

The tables below show the performance which one user task can achieve with its disk accesses without a competitive load:

• I/O rate in the number of IOs per second (IOs/s)

• Throughput in Mbyte/s

The performance was measured for the standardized load types with different block sizes and a read hit rate of 100%: The figures are rounded to 10 IOs/s or 1 Mbyte/s.

Load type	Number of IOs/s for one task with block size
	2 KB	16 KB	32 KB	160 KB	480 KB
Sequential read	5,910	4,610	3,650	1,280	490
Sequential write	4,250	3,460	2,790	1,010	400
Random25	5,342	4,220	3,350	1,190	470

Load type	Throughput for one task in Mbyte/s with block size
	2 KB	16 KB	32 KB	160 KB	480 KB
Sequential read	11	72	113	199	231
Sequential write	8	53	87	157	185
Random25	10	65	104	186	219