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RAMSan: PCI
Storage Flash Storage
RAM Storage
- The World's Fastest Storage®
- Over 200,000 random I/Os per second
- 1.5 GB/s random sustained external throughput
- IBM Chipkill technology
- Exclusive Active Backup® software
- Full array of hardware redundancy to ensure
availability.
Texas Memory Systems developed the RamSan-300
with the goal of providing an enterprise solid state disk with entry-level
pricing. The RamSan-300 meets these objectives by inheriting most of its
components from the RamSan-400 enterprise SSD, including the same memory boards,
Fibre Channel controllers, batteries, fans, power supplies, and backup hard disk
drives.
The RamSan-300 offers a lower cost alternative to
our larger capacity and higher performing RamSan-400 and RamSan-440 models.
Recent studies have shown that 95% of the world’s stored data is accessed
infrequently, and 66% is accessed only once. This suggests that the performance
of even large databases can be significantly improved by accelerating only a
small fraction of the files. The RamSan-300 is well-suited to handle small
databases, metadata storage, log and transaction files, and database indices. It
offers a low cost, low risk solution to application performance challenges that
plague large and small businesses alike.
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The RamSan-300 is one of the most advanced SSDs
on the market today. Its fast DDR RAM storage is ideal for storing
performance-demanding data and accelerating essential applications.
TMS' numerous customers have seen real-world performance increases from 2x to
25x simply by installing a single RamSan. It plugs into servers or fabrics
through basic Fibre Channel or InfiniBand connections and appears simply as a
very, very fast drive to the network, able to act as any disk or storage system
might. The RamSan-300 can accelerate numerous applications across industries. It
is best known for drastic performance gains in OLTP, batch processing, and other
intensive operations.
There is no tradeoff in reliability for all this performance. The RamSan-300
includes hot swappable redundancies wherever physical wear is a factor, such as
power supplies and backup hard disks. It also includes two independent internal
UPS systems to ensure that no power loss or power supply failure will stop the
RamSan from performing its internal backup procedures. Redundant cooling fans
and redundant failover data ports (optional) are also part of the sophisticated
design.
The RamSan-300 is designed to look like a disk to the network. Therefore, it is
highly interoperable and works in virtually any enterprise environment. It is
installed in numerous environments, including Apple OS X, AIX, Solaris, Linux,
and Windows. Hardware from Fibre Channel and InfiniBand vendors including Cisco,
Emulex, Brocade, McData, Mellanox, QLogic, LSI Logic, and ATTO easily
interoperates with the RamSan.
Exclusive to the RamSan is Active Backup® software. Other SSDs and cache system
can only "destage" data from RAM to backup disks once power is already lost.
This means that data is never backed up during normal operation and the
time-to-complete-backup after power loss is unacceptably long. A RamSan-300 with
Active Backup can continuously backup data on RAM to the internal backup hard
disks without impacting performance. This means in an emergency situation, data
is anywhere from 60-100% on the backup hard drives already.
RamSan-300 systems take reliability even farther
by implementing IBM Chipkill technology. Standard error correcting code (ECC)
implementations correct single-bit data errors in memory chips but cannot
correct the multi-bit errors that can result in data integrity issues. Chipkill
technology allows a memory system to correct a multi-bit failure up to and
including a total chip failure.
The RamSan-300 is the first solid state disk to include soft error scrubbing.
All solid state disks can correct a single bit error before sending data to the
server as a part of their ECC protection. The RamSan-300, however, goes a step
further by scrubbing; re-writing the corrected data to memory and then verifying
the re-write to determine if a memory chip has a failure (a hard error) or if
radiation transients caused the single bit error (a soft error). Systems that do
not scrub single bit memory errors will either a) report errors to a system log
that will eventually encourage replacement of a memory board or b) hide these
errors thus leaving a potentially unsafe memory board in the system. Research on
this topic suggests that 90% of single bit errors are soft errors. In these
cases, the RamSan-300 will correct the error through the scrubbing process and
prevent unnecessary downtime to replace the memory board.
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| I/Os Per Second |
| 200,000 |
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| Capacity |
| 16-32 GB |
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| Bandwidth |
| 1.5 GB per second |
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| Latency |
| Less than 15 microseconds |
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| Fibre Channel Connection |
- 4-Gigabit Fibre Channel (2-Gigabit
capable)
- 2 ports standard; up to 4 ports available
- Supports point-to-point, arbitrated loop,
and switched fabric topologies
- Interoperable with Fibre Channel Host Bus
Adaptors, switches, and operating systems
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| InfiniBand Connection |
- 4x InfiniBand (10-Gigabit)
- 1 port standard; up to 2 ports available
- Supports SRP upper level protocol
- Interoperable with InfiniBand Host Channel
Adaptors, switches, and operating systems
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| Management |
- Browser-enabled system monitoring,
management, and configuration
- Telnet management capability
- Front panel displays system status and
provides basic management functionality
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| LUN Support |
- 1 to 1024 LUNs with variable capacity per
LUN
- Flexible assignment of LUNs to ports
- Hardware LUN masking
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| Data Retention |
- Non-volatile solid state disk
- Redundant internal batteries power the
system for 25 minutes after power loss
- Automatically backs up data to disk at 60
MB/sec
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| Reliability and Availability |
- Chipkill technology protects data against
memory errors up to and including loss of an entire memory chip
- Internal redundancies
- Power supplies and fans
- Backup battery power
- Backup hard disk drives (mirrored)
- Hot-swappable components
- Two backup hard drives (front access)
- Power supplies
- Soft Error Scrubbing
- When a single bit error occurs on a read, the RamSan will
automatically re-write the data to memory thus scrubbing soft errors.
Following the re-write the system re-reads to verify the data is
corrected.
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Supports two backup modes that are configurable per system or per LUN: |
- Data Sync mode - synchronizes data to
redundant internal disk drives before shutdown or with power loss
- Active Backup® mode (optional) - backs up
data constantly to internal redundant disks without impacting system
performance.
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| Size |
| 5.25" (3U) X 16" |
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| Power Consumption (peak) |
| 250 Watts |
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| Weight (maximum) |
| 70 lbs |
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