The RAM-SAN storage
appliance by Texas Memory Systems offers a combination of high
bandwidth and low latency unmatched by any competing storage device.
It removes the time-critical bottlenecks inherent to RAID-based
storage, resulting in a dramatic decrease in response time for SAN
file accesses. Unlike
rotational storage media, the RAM-SAN’s ultra low latency (< 20
microseconds) is maintained across a wide range of operating scenarios
– whether file accesses are short or long, random or sequential,
shared or private. Used
alone, the RAM-SAN delivers unmatched READ and WRITE performance.
Used in conjunction with a network RAID, the RAM-SAN delivers
unmatched READ performance while still maintaining the data
persistence of magnetic storage.
While the RAM-SAN
requires only a modest 10.5” of rack space, it still provides higher
bandwidth than refrigerator-sized disk arrays.
This available bandwidth provides an upward growth path for
more demanding future applications, as well as extra
bandwidth for truly demanding current applications.
This performance is independent of storage capacity, with even
the smallest RAM-SAN offering 3 Gigabytes per second of system
bandwidth. RAM-SAN systems start at $54,000 for 8 Gigabytes of
solid-state storage and a single Fibre Channel link.
This capacity can easily be expanded to 64 Gigabytes and as
fifteen total Fibre Channel links.
In addition to
bandwidth, the RAM-SAN also delivers unmatched access latency.
Typical disk-based storage becomes progressively slower as more
users attempt to access the same file.
This same decrease in performance occurs as file accesses
become “more random”. The
RAM-SAN, by comparison, provides immediate data access, even under
conditions of maximal loading and highly random addressing. While most high performance RAIDs are capable of delivering
approximately 1,000 IOPS, a fully loaded RAM-SAN is capable of
delivering over 500,000 IOPS!
Typical RAM-SAN applications include multi-user relational
databases, “hot files,” high-traffic web page retrievals,
recording or playback of real-time data streams, and any other
application with a significant “hate-to-wait” factor.
The RAM-SAN includes
three separate hot-swappable power supplies, each with its own AC
power source. This redundancy
allows for failed power supplies to be easily replaced without the
need for a system shutdown. While
the RAM-SAN has no internal hard disk dedicated to backup service, TMS
does provide several external backup options that are available to the
user as described in the Backup Method section.