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RAMSan: PCI
Storage Flash Storage
RAM Storage
- Cached Flash RAID for the Enterprise
- 1TB to 2TB Flash RAID
- 16GB to 64GB DDR Cache
- 100,000 random IOPS sustained (reads from
Flash)
- 2 GB/s sustained bandwidth (to Flash)
- Full array of hardware redundancy to ensure
availability
The RamSan-500’s cached Flash design delivers
unprecedented high read performance and large capacity storage at a price point
that makes solid state disks more affordable than ever before. Compared to a
similar capacity high-end hard disk-based RAID system, the RamSan-500 can
deliver in excess of sixteen times the performance while using 50% less power.
The RamSan-500’s cached Flash design utilizes the
fastest RAM memory to create a large, performance-boosting cache for the high
capacity, lower cost Flash-based storage. Available in one or two terabyte
capacities in a 4U rack mount chassis, the RamSan-500 delivers 100,000 I/Os per
second (IOPS) and two gigabytes per second of sustained random read or write
bandwidth and yet only consumes 250 Watts of power. The system can be SAN or
NAS-attached with up to eight 4-gigabits per second Fibre Channel ports.
Multiple RamSan-500s can be combined to deliver additional high-performance
capacity.
Increasing performance and I/O requirements in
markets such as OLTP, data warehousing, and video editing/streaming are driving
a need for solid state storage solutions like the RamSan-500. These SSDs are
deployed to accelerate software applications and network file systems. With
solid state disks, applications can accommodate more concurrent users and
simultaneous transactions, while being more economical than adding monolithic
RAID, servers, RAM, or constant application tuning.
The RamSan-500, TMS' 12th generation solid state
disk, is the most important advance in SSD technology in the last 20 years. The
system is designed for high IO data warehousing, high bandwidth data
acquisition, and rich media environments. The RamSan-500 is a hybrid of DDR RAM
and Flash memory (NAND-SLC). The judicious use of RAM cache and advanced Flash
architecture extends the usability of this hybrid device into applications with
large block sequential or random writes, small block synchronous sequential
writes, and any read-intensive application.
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The RAM cache (16-64GB) provides sub-20
microsecond cache hit times and shelters the Flash storage from small random
data accesses. The data in RAM is protected with ECC and Chipkill. The RAM cache
is battery-backed up with redundant batteries.
The Flash storage (1-2TB usable capacity) is
arrayed in nine RAID-3 protected hot swappable modules. The reliability of each
module is further enhanced with ECC memory layouts, wear-leveling, and bad-block
retirement. The RamSan-500 uses NAND-SLC Flash chips, the highest quality of
Flash available on the market. The RamSan-500 is designed from the ground-up to
protect data from the problems inherent to traditional Flash storage.
The RamSan-500 is the perfect combination of performance, price, and capacity.
With up to 2TB of capacity, the system provides ample space for storing entire
databases or frequently accessed files. Through its 4Gbit Fibre Channel or 4x
InfiniBand ports the system is capable of over 100,000 random IOPS or 2
GB/second of sustained bandwidth (even with cache misses).
The RamSan-500 appears simply as a very fast
drive to the network, able to act as any disk or storage system might. The
RamSan-500 can accelerate numerous applications across industries. It is best
known for producing dramatic performance gains in read intensive environments
such as read-intensive OLTP environments, data warehousing, video on demand, and
rendering.
Customers looking for high speed small block random write performance are
encouraged to consider the RamSan-440.
There is no tradeoff in reliability for this performance. The RamSan-500
includes hot swappable components or redundancies wherever physical wear is a
factor, such as power supplies and Flash storage. It also includes two
independent internal UPS systems to ensure that no power loss or power supply
failure will stop the RamSan from flushing data from the RAM to the Flash RAID.
Redundant cooling fans and redundant failover data ports (optional) are also
part of the sophisticated design.
The RamSan-500 is designed to look like a disk to the network or operating
system. Therefore, it is highly interoperable and works in virtually any
enterprise environment. It can be installed in numerous environments, including
Apple OS X, AIX, Solaris, Linux, HP-UX, OpenVMS and Windows. Hardware from Fibre
Channel and InfiniBand vendors including Cisco, Emulex, Brocade, McData,
Mellanox, QLogic, and LSI Logic easily interoperates with the RamSan.
The RamSan-500 includes the most management features of any solid state disk.
Administrators can manage the RamSan over the network or by directly connecting
to the unit. The RamSan can be fully configured and monitored from either a
Telnet or a browser. The front panel displays system status and allows basic
management functionality as well.
The Turbo feature allows segregation of write and read data between RAM and
Flash to accelerate transactional databases and mixed load applications. It can
also reduce wear on the Flash memory to boost the operating life of the system.
Turbo delivers microsecond response times. Turbo works by allowing
administrators to lock a storage Logical Unit (LUN) entirely in high speed RAM
cache, thus dedicating a portion of the cache to a specific dataset such as
write-intensive metadata, redo logs, temporary space, or table spaces. The
RamSan's high availability features such as redundant battery and RAID-protected
Flash ensure that the data in the locked LUN is persistent, even in the event of
an external power loss.
Email Alert is an optional feature of the RamSan that will send an email in the
event of a change in system status. This feature allows a system administrator
to proactively resolve potential hardware or software problems before they
escalate.
DataStat-Archive for the RamSan provides performance information that allows
users to identify the I/O, bandwidth, and latency metrics for any given period
of time for the past year. Using this optional feature makes it easier for
customers to plan and organize their use of resources.
For customers who have multiple units, we offer Terawatch, an optional software
feature that allows management of multiple RamSans from a single management
console. Terawatch is a part of the same management software program used to
manage the RamSans individually; therefore no additional training is required to
run Terawatch.
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I/Os Per Second
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| 100,000 |
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Capacity |
| 1-2 TB of Flash RAID
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| 16-64 GB of DDR Cache
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Bandwidth |
| 2 GB per second |
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Latency |
| Cache hit read and writes: less
than 15 microseconds |
| Cache miss read: less than 200
microseconds |
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Fibre Channel Connection
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- 4-Gigabit Fibre Channel (2-Gb capable)
- 2 ports standard; up to 8 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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Management |
- Browser-enabled system monitoring,
management, and configuration
- SNMP supported
- Telnet management capability
- Front panel displays system status and
provides basic management functionality
- Cache Management
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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 |
- Redundant Battery - backed up cache
- Automatically flushes data to Flash RAID
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Reliability and
Availability |
- Chipkill technology protects cache against
memory errors up to and including loss of an entire memory chip
- Flash Layer 1: ECC (chip)
- Flash Layer 2: RAID-3 (system)
- Internal redundancies
- Power supplies and fans
- Backup redundant battery power
- Hot-swappable components
- Nine Flash RAID protected modules (front access)
- Power supplies
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Cache Modes |
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Size |
| 7" (4U) X 20" |
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Power Consumption (peak)
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| 300 Watts |
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Weight (maximum)
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| 70 lbs |
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