Performance in Intel IOMeter WorkStation Pattern

Now let’s pass over to WorkStation pattern, which imitates active user work in various applications in NTFS5 file system:

As always here follows the graph showing the dependence of arrays performance on the requests queue depth:

The performance of RAID 0 arrays starts scaling depending on the number of HDDs in the array at 2 requests queue already. However, unlike all previous patterns, when we reach 16 requests the performance growth stops.

Since there are quite many write requests in the queue, the mirrored arrays, such as RAID 1 and RAID 10, lag a little behind the single drive and a 2-HDD RAID 0 array respectively.

To compare the performance of RAID arrays of different types depending on the efficiency of WB-caching, let’s build the following chart with the array performance ratings. The ratings this time will be calculated according to the formula below:

Performance Rating = 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

Even the presence of many write requests didn’t affect the ratings, and the picture appears just the same as in FileServer pattern.