Blade server computing is fast transforming the server industry with a host of advantages in terms of design, functionality and total cost of ownership. By separating CPU and memory from other components such as cabling, power supply, network connectivity and cooling systems, blade servers significantly reduce massive enterprise server architectures into highly compact and dense form factor. According to market research company IDC, the blade server market is projected to represent nearly 29 percent of server unit shipments worldwide by the end of 2008.
Laptop Battery
Although its inherent compact design enhances scalability and ease of use for IT administrators, a blade server poses design challenges with regard to the installation of direct attached storage (DAS) devices. Since several blades already share the same power supply, cooling system and chassis, the most logical thing to do is to utilize a low-power, low-heat and compact hard disk drive. The first thing that comes into one's mind is the 2.5-inch mechanical disk drive, the same disk drives installed in notebook computers. However, for enterprise-wide applications, a better solution exists in the form of solid-state disks (SSDs), in particular flash SSDs.
VicRoads internally manages 250 servers, of which 40 are blade servers in four BladeCenters. About half of the blades are single disk SAN connected blades (no RAID). There are about 45 servers external to Head Office which act as domain controller and file servers. mostly on blades. The rest of the server fleet are for numerous applications, including web hosting and internal application requirements.
Thinkpad
Flash SSDs are high-performance, rugged plug-and-play storage devices that contain no moving parts. Using flash memory chips for storage, these devices are available in the same industry-standard form factors (2.5-inch, 3.5-inch and PMC) and interfaces (Fibre Channel, SCSI, ATA/IDE) as hard disk drives, but instead use flash memory chips in lieu of rotational magnetic disks to store data. This article seeks to explain and illustrate how flash SSDs stack up against other storage devices in blade server applications.
According to the indictment, Jones would steal various IBM and Penguin computer servers from Verisign's warehouse in Virginia and sell them to Johnson. Johnson would then sell the servers to several individuals, who would sometimes place them for sale on eBay. As a result of this scheme, the indictment alleges that Jones and Johnson caused Verisign to lose more than $120, 000 worth of computer equipment. In the indictment, Jones and Johnson are charged in three counts with causing the interstate transportation of stolen property, namely IBM 330 and 335 servers, in violation of 18 U.S.C.
Microsoft
Flash SSDs vs. DRAM SSDs
One SSD variant in the market today is the DRAM SSD. Used mostly in large, rackmount architectures, this device cannot be considered a viable alternative in blade server storage due to several design limitations. Owing to the volatile nature of DRAM memory, a DRAM SSD requires its own power supply, cooling fan and disk backup for data retention. These components eat up valuable space inside the drive chassis, limiting total storage capacity (less room for memory chips) and form factor (smallest DRAM SSD is 3.5-inch). Consider further its weight, and you'll have a recipe for disaster in embedded systems design.
Class server blades; however, to obtain the best performance, Express connector on the blade servers.
Laptop Computers
Flash SSDs vs. HDDs
As mentioned earlier, the most important factor in finding the right DAS for blade servers is its impact on overall system performance and cost effectiveness. In terms of power consumption, mechanical hard disks typically devour around 500mA while flash SSDs consume a mere 50mA. The difference may seem insignificant in small enterprise apps, but for huge data farms, the cost savings become apparent. This further enhances the blade server's advantage over proprietary systems with regard to operational costs.
"Computer industry analysts estimate that some 60 percent of all corporate data exists only on desktop and laptop computers, " said Walter Scott, CEO of Acronis. "Incorporating Acronis True Image with New Mexico Software backup server is the ideal solution to capture that corporate data and ensure that it is not lost. While traditional server backups are effective for protecting server data, every company should have a combination of server and workstation backup plans."
Laptop Computer
The reliable performance of mechanical disk drives can only be ensured if these drives operate within specified temperature ranges. As drive manufacturers introduce newer models featuring spindle speeds as high as 15,000 RPM, cooling has emerged as a major issue. In fact, some suppliers are providing a dedicated cooling fan or fan/heatsink combos for optimum high-speed drive performance. Unfortunately, the cooling systems of blade servers are shared, and there's no room for these add-ons.
1. ZXTM GLB beats competition to make Network Computing ‘Product of the year’ short list, 30 January 2008 ... DNS (Domain Name System)-based Global Server Load Balancing system and is ... unique in that, unlike most Global Server Load Balancer products available ... built Zeus appliance, standard server s, blades, or even virtualized ... class companies such as AMD, Dell, Egenera, HP, IBM, Intel, Sun Microsystems ...
Desktop Computer
Rugged Capabilities
Most blade server vendors are searching for more efficient means of cooling densely packed blades. Hewlett Packard's "dynamic smart cooling" initiative seeks to control heat by focusing cooling on areas identified as "hot spots." For its part, IBM is working on liquid-cooled heat sinks for server processors and water-cooled cabinets. However, these ideas are still under development and are not available now.
Notebooks
Unlike an HDD, a flash SSD generates minimal heat since it has no moving parts, and users can expect the same degree of high-level performance in a wider operating temperature range. These rugged features make flash SSD the most suitable storage platform for Level 3 NEBS-compliant servers. NEBS (Network Equipment Building System) refer to a set of standards established by Bellcore (now known as Telcordia) to determine electromagnetic compatibility, thermal robustness, fire resistance, earthquake and office vibration resistance, and transportation/handling durability of telecom equipment. Telecom carriers deploy equipment to remote locations with unpredictable operating conditions, and NEBS allows them to identify equipment that can provide a high degree of reliability and safety to their network.
Lenovo
The E-Disk Advantage
BiTMICRO Networks, a leading player in the flash SSD arena, successfully penetrated the military/industrial markets with its ruggedized E-Disk flash SSDs. These models are guaranteed to operate in extreme temperatures, from -60°C to +95°C. Other environmental specs are likewise impressive, up to 150Gs of operating vibration and up to 1,000Gs of operating shock, making enterprise and carrier class applications a breeze.
Hard Drive
One variant is the E-Disk PCI Mezzanine Card (PMC)-based plug-in flash SSD module. Suitable for blade servers (with PMC slot) that require a reliable, direct attached storage device, it features horizontal connectors that allow parallel fit onto a blade, giving plug-and-play advantages to system administrators. The E-Disk® PMC can also be used as a boot and/or storage device for carrier boards such as CompactPCI, VME and MultiBus, and almost any other type of single board computer.
Travelstar
In the enterprise arena, the rising deployment of business intelligence, OLTP (online transaction processing), decision support systems and other transaction-intensive applications place a premium on rapid information transfer, access and retrieval. Fibre Channel and Ultra Wide SCSI E-Disk solid-state drives' impressive performance up to 70 MB/s sustained reads, 48 MB/s sustained writes and 12,500 IOPS make them ideal for applications that exhibit grueling, rapid-fire data access brought forth in transactional and high storage bandwidth environments.
Gateway
Conclusion
At present, blade servers utilize DAS mainly for system boot and application storage, with a Fibre Channel interface designed into the server to allow for a separate SAN connection. Flash SSDs can help improve, not impede, system performance with faster access times, high I/O rates and solid-state durability. Consider other factors such as hot swappability and ease of deployment, flash SSD is certainly an ideal DAS solution for blade servers.
Laptop Parts
For more information, visit the E-Disk Technology Center at www.e-disk.com.
Software
[ Comment, Edit or Article Submission ]
