Foglight for Storage Management uses the following units of measurement:
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B/s — Number of bytes per second. Frequently converted to KB/s or MB/s. |
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ops/s — Number of operations per second. |
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ms — Milliseconds. Frequently converted to μs (microsecond). |
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m — milli — Thousandth. |
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ms/op — Milliseconds per operation. |
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MB — Capacity metrics are captured in MB (megabytes), but are frequently displayed in GB (gigabytes) or TB (terabytes). |
Performance metrics are organized into the following categories:
Average number of bytes per second received through a port. The data rate, compared against the Baseline of typical activity, indicates whether the current traffic is typical or out of the norm. |
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Also Data Xmit Rate Average number of bytes per second transmitted through a port. The data rate, compared against the Baseline of typical activity, indicates whether the current traffic is typical or out of the norm. |
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Average number of frames per second received and transmitted through a port. |
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Average number of frames per second received through a port. |
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Also Frame Xmit Rate Average number of frames per second transmitted through a port. |
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Average number of link errors per second on a port. Link errors are caused by or affect the link status of the connection. Link errors include: |
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Average number of non-link errors per frame on a port. Non-link errors include: |
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= Data Receive Rate / Link Speed, expressed as a percentage. Utilization values help you identify ports that may be overloaded. |
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= Data Send Rate / Link Speed, expressed as a percentage. Utilization values help you identify ports that may be overloaded. |
Also displayed as Pct Busy or Busiest Average percentage of time a component is busy doing I/O during the collection period. |
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Percentage of read operations that can be satisfied from the cache. |
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Percentage of read operations that can be satisfied from this cache. |
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Percentage of read operations that can be satisfied from this cache. |
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NOTE: Latency is not the sum of read latency and write latency. The number of read operations and write operations is different. |
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