Calculate read % and write %?

Question

I have a nar file from a CX700. How do I calcualte the percent of throughput that is read or write? I can do a visual check of the read throughput, write throughput and total throughput and take a good guess at the percentage, but how do I get an accurate number? If I export data as a CSV file, i get the following format (number made up to make calculation easy) Total Throughput   Read Throughput  Write Throughput 10                         5                         5 20                         12                       8 25                          20                      5 15                         8                         7 Is this formula accurate to calculate the read %: SUM(ALL READ THROUGHPUT VALUEs) / SUM (ALL TOTAL THROUGHPUT VALUES) * 100. Probably more of a statistics question than a Clariion question, but there is no statistics forum

Bor4s · Accepted Answer

Throughput — The number of individual I/Os the storage system can process over time. It is measured in I/Os per second (IOPS) Also please bear in mind that Throughput 'exists' on LUN / metaLUN, Disk and SP level As an example Read Throughput for SP can be displayed by navigating in Navisphere SP Properties > Statistics tab It will display the following – - Logging State – Read Cache Hit Ratio [%] – Read Throughput [IO/s] – Read Bandwidth [KB/s] – Write Cache Hit Ratio [%] – Write Throughput [IO/s] – Write Bandwidth [KB/s] – Number of Write Cache Pages – Utilization [%] – Dirty Pages [%]

kelleg · Answer

Using the DUMP to CSV and then using the formula should work - it will be as accurate as the data in the CSV. There is no percentage given in Analyzer. glen

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