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1035
June 10th, 2010 11:00
Calculate read % and write %?
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
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Bor4s
10 Posts
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June 10th, 2010 11:00
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
6 Operator
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4.5K Posts
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June 11th, 2010 10:00
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