Cisco Cisco UCS C250 M1 Extended-Memory Rack-Mount Server White Paper
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With three virtual machines loaded system, the 256-KB sequential read access profile reached a peak bandwidth of 487 MBps
(Figure 68).
(Figure 68).
Figure 68. 256-KB Sequential I/O on Three Virtual Machines per Blade: 100 Percent Read
With three virtual machines loaded, the 256-KB sequential write access profile reached a peak bandwidth of 226 MBps
(Figure 69). The increase in response times occurred because all the virtual machines perform 100 percent write operations.
(Figure 69). The increase in response times occurred because all the virtual machines perform 100 percent write operations.
Figure 69. 256-KB Sequential I/O on Three Virtual Machines per Blade: 100 Percent Write
This data is similar to what is seen in the case with a single virtual machine per blade (Figure 65). The response time variations
(the fourth and fifth nodes have longer response times than the sixth node) are aggravated further because this scenario uses
more virtual machines. Hence, caution must be exercised while running such high sequential write-intensive workloads.
(the fourth and fifth nodes have longer response times than the sixth node) are aggravated further because this scenario uses
more virtual machines. Hence, caution must be exercised while running such high sequential write-intensive workloads.