Editing Analysis Parameters

Analysis Parameters allow you to specify values to be used in creating workloads that are not available through acquisition. For example, actual block sizes are not tracked by most arrays. An average block size can typically be calculated by dividing throughput by read/write operations.

In reality, applications use a variety of block sizes so Analysis Parameters allow you to specify the block sizes to use. The analysis calculates the appropriate % of each block size that arrives at the average block size. For VirtualWisdom data, the top ten read block sizes and the top ten write block sizes are used during this analysis. For other logs, the top four read and write block sizes are used for analysis.

If you are working with workload data and an analysis policy that does not give the block sizes information at all, whether directly or indirectly, then you can still manually specify the distribution of block sizes. In order for a valid workload model to be created, at least one read and one write block size must be specified.


Other types of parameters can be configured in a similar fashion. The types of parameters that are user configurable are defined in the Calculation Rules Analysis Policy, which specifies what user input is required to support calculated values.