The World's Fastest Storage : solid state disks (RAM-based storage)

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I/Os Per Second

IOPS are the single best indicator of how well a solid state disk, or any other storage device, will support database traffic. Solid state disk drive manufacturers like to talk about low latency-- the "lag time" in between a drive getting a request for data and providing that data. In fact, most solid state disk manufacturers claim latency numbers from 14 microseconds to 50 microseconds. The truth of these numbers is borne out in the IOPS. If all latencies are so similar, then performance for solid state disks should be similar. In fact, nothing could be further from the truth. Our highest performing competitor claims 40,000 random IOPS; a number that is still 5 times less than our RamSan-220.

The RamSan-220 can deliver 200,000 random IOPS to your applications. A single port on the RamSan-220 can provide 100,000 random IOPS. The reason that we stress "random IOPS" is that RAID manufacturers occasionally cite their IOPS performance. Discerning buyers should be aware that these numbers are almost always sequential IOPS performance. The problem with sequential IOPS is that there are almost no applications in the real world that result in sequential small block disk access.

So why do you need IOPS? IOPS are needed to process database transactions. Database transactions have two main characteristics: they are small (averaging around 8K) and they are random. Small random file accesses thrash hard disk drives. In fact, a really good disk drive can provide around 300 random IOPS. A fast RAID can handle 5,000 random IOPS. Which brings us back to original question, it is important to support a high number of IOPS because your servers can support a high number of IOPS. The latest processors are operating at over 3 Gigahertz per second. However, since the early 1980s processors have been faster than storage. Over the last twenty years, the gap between processor performance and storage performance has widened.

When your processor is faster than your storage, then your processor literally waits on storage for data needed to perform calculations, this is called I/O wait time. If your processor is waiting, then your users are waiting. On top of that, you are wasting a significant investment in the latest processors.

By supplying incredibly high random IOPS, the RamSan-220 eliminates I/O wait time for all files that it stores. Because its random IOPS capabilities are so amazing, it is possible for a single RamSan-220 to provide I/O acceleration for multiple host servers.

When you consider our combined bandwidth and random IOPS performance it is clear why we call RamSan "The World's Fastest Storage".

RamSan-220 Resources
Flash Presentation
RamSan-220 Education (PDF)
RamSan-220 Datasheet (PDF)
Free White Papers
Hot File Detection Software

Fibre Channel Host Bus Adaptor (HBA) Qualification Matrix

Interactive Demonstration of Java-enabled Monitor

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