IOPS vs Throughput (MBps)?

$\text{IOPS} * \text{TransferSizeInBytes} = \text{BytesPerSec}$ (with the answer typically converted to MegabytesPerSec)

Some ballpark numbers:

Device	Type	IOPS	Interface
7,200 rpm SATA drives	HDD	~75-100 IOPS^[2]	SATA 3 Gb/s
10,000 rpm SATA drives	HDD	~125-150 IOPS^[2]	SATA 3 Gbit/s
10,000 rpm SAS drives	HDD	~140 IOPS ^[2]	SAS
15,000 rpm SAS drives	HDD	~175-210 IOPS ^[2]	SAS

Solid State Devices ranges 60,000 to 400,000 IOPS depending the type of brand/model and connectivity (SATA cable (3g/6g), FC/InfiniBand, or PCIe). Info from - http://en.wikipedia.org/wiki/IOPS

As of Jul 2012, the SSD max throughput is still below 600MBps for SSD and 1GBps using PCIe technology. SATA cable can transfer max 6Gbps (or 768MBps - 6Gbps/6bit). With PCIe, this can double to 16Gbps (or 2048MBps). There is a need to seriously look into the storage design how the disk should be connected (SATA cable or PCIe) for optimum performance. Or else, you would buy an expensive SSD which will be underperformed due to the throughput.

SSD - http://en.wikipedia.org/wiki/Solid-state_drive

SATA cable - http://en.wikipedia.org/wiki/Serial_ATA

Data unit conversion - http://en.wikipedia.org/wiki/Megabytes_per_second#Megabyte_per_second

Comments

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