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Micron RealSSD P400E Five Drive JBOD Enterprise Report - 4K and 8K Random

We take five Micron P400E SSDs for a spin. With the value conscious read-centric enterprise storage segment rapidly expanding, Micron brings the P400E forward as the solution for entry-level enterprise-class SSD storage.

By: | RAID/HBA in IT/Datacenter | Posted: Aug 15, 2012 3:31 pm
Manufacturer: Micron

4K Random

 

4K random read speed measurements are an important metric when comparing drive performance, as the hardest type of file access for any storage solution is small-file random. We test with a five-second ramp time to eliminate any burst results. Random read speeds are largely unaffected by extra over-provisioning and steady state, so we only include standard results for read data, unless the results requires otherwise.

 

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The 4K random read IOPS is superb, continuing to scale very well up through the higher Queue Depths. At a QD of 160 the drives top out at 234,665 IOPS. Roughly a quarter of a million IOPS is very good for the price of this array.

 

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The 5 x P400E JBOD delivers roughly 250K IOPS, but in steady state pulls off 64,903. More impressive is that with a 20% overprovisioning there is a roughly 29% increase, bringing the results up to 93,956 IOPS. The low price point will allow more flexibility for some users to sacrifice some capacity for higher random write performance.

 

 

8K Random

 

8K random read and write speed is a metric that is not commonly tested for consumer use, but for enterprise environments this is an important aspect of operation. With several different workloads relying heavily upon 8K performance, we include this as a standard with each evaluation. Many of our Server Emulations on the following pages will also test 8K performance with various mixed read/write workloads.

 

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For 8K 100% Random Read the SSDs deliver 84,018 IOPS in steady state.

 

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The 8K Random write speed in steady state is 4,893 IOPS and scales to 5,449 IOPS with extra overprovisioning added. This is roughly an 11% increase, not nearly as high of a percentage of increase as we observed with the 4K results.

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