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Performance in Intel IOMeter WorkStation Pattern

WorkStation pattern imitates the user’s intensive work in different applications of the NTFS5 file system.

Now let’s consider the WT and WB graphs separately.

RAID 0 arrays boast a noticeable performance growth, however, the dependence on the number of drives involved starts telling only when the queue is over 4 requests. RAID 01 array outperforms RAID 0 array of four drives, but suffers a performance drop at queue=16, just like RAID 1.

As we have already shown above, the use of WB-caching results into a performance boost. RAID 01 array outpaces RAID 0 array of four HDDs at queue=2.

To compare the performance of different types of RAID arrays and analyze the influence of the WB-caching, we will again apply our rating system. The rating for WorkStation pattern is calculated according to the following formula:

Performance = Total I/O (queue=1)/1 + Total I/O (queue=2)/2 + Total I/O (queue=4)/4 + Total I/O (queue=8)/8 + Total I/O (queue=16)/16 + Total I/O (queue=32)/32

The large writes share made RAID 1 lag behind RAID 0 of two drives. While RAID 01 array managed to retain the second position even though the 3-HDD RAID 0 was close behind it. As we see, enabled WB-caching results into 6-10% performance increase.

 
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