DELL PERC 710p - Cut-Through IO (CTIO)

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New features: Cut-Through IO (CTIO)
Performance boosts (up to 2X IOPS performance),
optimized for superior IOPS of SSDs over HDDs,
Ideal for small-block random workloads,
Easy to enable

Cut-Through IO is an IO accelerator that boosts the throughput of devices connected to the PERC Controller. It is enabled through disabling the write-back cache (enable write-through cache) and disabling Read Ahead.

The Dell Technical White Paper High Performance Tier Implementation Guideline for PowerVault MD32200 and MD3200i Storage Arrays. the Dell Technical White Paper Array Tuning Best Practices for PowerVault MD32200 and MD3200i Storage Arrays,


http://sqlblog.com/blogs/joe_chang/archive/2010/10/11/caching-raid-controller-performance-tuning-secrets-cough-giggle.aspx



the per-virtual disk configuration required for Fast Path is write-through cache policy, no read-ahead, and direct (non-cache) I/O.

- to be continue -


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