Performance is key to a quality solid state disk. The RamSan-320 is
the World's Fastest Storage®. The system delivers 3000 MB/second of
bandwidth and 250,000 random I/Os per second.
The RamSan delivers its massive bandwidth to hosts through up to eight 2Gb
Fibre Channel interface ports. High bandwidth provides two main benefits:
1. Some applications require high bandwidth. Good examples include
video on demand and non-linear editing of HDTV.
2. High bandwidth enables the RamSan-320 to be shared across multiple
hosts without impacting performance.
Competing solid state disks that have less bandwidth than the
RamSan-320 cannot support all of the applications that we support and
cannot be shared with as many hosts without compromising performance.
Our nearest competitor claims less than 10 percent of our available
An important note as you compare solid state disk to RAID: our solid
state disk bandwidth numbers can be sustained with random data streams.
RAID systems can only sustain high bandwidth numbers with sequential
I/Os Per Second (IOPS)
IOPS are the single best indicator of how well a solid state disk or
any other storage device supports database traffic. Solid state
disk drive manufacturers like to talk about low latency-- the "lag
time" in between a drive receiving a request for data and providing
that data. In fact, most solid state disk manufacturers claim latency
numbers from 10 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 SSD competitor
claims 60,000 random IOPS; a number that is still 4 times less than our
The RamSan-320 can deliver 250,000 random IOPS to your applications.
A single port on the RamSan-320 can provide 50,000 random IOPS. We stress "random IOPS"
because RAID manufacturers
occasionally cite their IOPS performance. Discerning buyers should be
aware that these quoted numbers are almost always sequential IOPS performance.
The problem with sequential IOPS is that almost no 'real world' applications
actually result in sequential small block
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.
The fastest cache built in to expensive storage systems can handle at
most 150,000 IOPS. This brings us back to the original question -- it is
important to support a high number of IOPS because your servers can
produce a high number of IOPS.
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. In addition, you are wasting a significant investment in
the latest processors.
By supplying incredibly high random IOPS, the RamSan-320 eliminates
I/O wait time for all of its stored files. Because its random IOPS
capabilities are so amazing, a single RamSan-320 can
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®".