AWS Storage Gateway - Measuring Performance between Your Application and Gateway

AWS Storage Gateway User Guide
Measuring Performance Between
Your Application and Gateway
Measuring Performance Between Your Application
and Gateway
Data throughput, data latency, and operations per second are three measures that you can use to
understand how your application storage that is using your gateway is performing. When you use the
correct aggregation statistic, you can use Storage Gateway metrics to measure these values.
A statistic is an aggregation of a metric over a specified period of time. When you view the values of a
metric in CloudWatch, use the Average statistic for data latency (milliseconds), use the Sum statistic
for data throughput (bytes per second), and use the Samples statistic for input/output operations per
second (IOPS). For more information, see Statistics in the Amazon CloudWatch User Guide.
The following table summarizes the metrics and corresponding statistic you can use to measure the
throughput, latency, and IOPS between your applications and gateways.
Item of Interest How to Measure
Throughput Use the ReadBytes and WriteBytes metrics with the Sum CloudWatch
statistic. For example, the Sum value of the ReadBytes metric over a sample
period of 5 minutes divided by 300 seconds gives you the throughput as a rate
in bytes per second.
Latency Use the ReadTime and WriteTime metrics with the Average CloudWatch
statistic. For example, the Average value of the ReadTime metric gives you
the latency per operation over the sample period of time.
IOPS Use the ReadBytes and WriteBytes metrics with the Samples CloudWatch
statistic. For example, the Samples value of the ReadBytes metric over a
sample period of 5 minutes divided by 300 seconds gives you IOPS.
For the average latency graphs and average size graphs, the average is calculated over the total number
of operations (read or write, whichever is applicable to the graph) that completed during the period.
To measure the data throughput from an application to a volume
1. Open the CloudWatch console at https://console.amazonaws.cn/cloudwatch/.
2. Choose Metrics, then choose the All metrics tab and then choose Storage Gateway.
3. Choose the Volume metrics dimension, and find the volume that you want to work with.
4. Choose the ReadBytes and WriteBytes metrics.
5. For Time Range, choose a value.
6. Choose the Sum statistic.
7. For Period, choose a value of 5 minutes or greater.
8. In the resulting time-ordered sets of data points (one for ReadBytes and one for WriteBytes),
divide each data point by the period (in seconds) to get the throughput at the sample point. The
total throughput is the sum of the throughputs.
The following image shows the ReadBytes and WriteBytes metrics for a volume with the Sum
statistic. In the image, the cursor over a data point displays information about the data point including
its value and the number of bytes. Divide the bytes value by the Period value (5 minutes) to get the data
throughput at that sample point. For the point highlighted, the read throughput is 2,384,199,680 bytes
divided by 300 seconds, which is 7.6 megabytes per second.
API Version 2013-06-30
206