Nytro MegaRAID Revision 1.7 Overview : Nytro MegaRAID Controller Features and Benefits : Monitoring the Nytro Cache Performance

Monitoring the Nytro Cache Performance

The Nytro Cache performance monitoring feature enables you to view and monitor the I/O statistics and firmware caching activity. The I/O cache performance indicators include the performance indicators, such as total read I/Os, read hits, read miss, total write I/Os, write hits, write miss and so on. This feature lets you collect the following information:

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Cache capacity – The size of cache available for caching.

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Cache utilization – The percentage of the free and in use cache size.

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Host I/O count – The number of host reads and writes.

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Hit rate – The percentage of I/Os completed from cache.

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Average I/O bandwidth – The number of bytes, MBs, and GBs written into the VD and read from the VD.

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Average host I/O latency – The average time taken to complete an I/O request.

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Hit count – The number of I/Os completed from cache.

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Miss count – The number of I/Os that were not found on cache and retrieved from the disk.

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Other cache statistics – The number of total cache windows, dirty, and non-dirty cache windows.

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Host I/Os – The number of I/Os completed by firmware and I/Os coming from host.

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Disk I/Os – The number of I/Os completed by firmware and directed to disk.

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VD statistics – Information per VD.