Introduction
Blade servers are self-contained computer servers,
designed for high density. Slim, hot swappable blade servers fit in a single
chassis like books in a bookshelf — and each is an independent server, with its
own processors, memory, storage, network controllers, operating system and
applications. The blade server simply slides into a bay in the chassis and
plugs into a mid- or backplane, sharing power, fans, floppy drives, switches,
and ports with other blade servers.
Blade servers are self-contained computer servers,
designed for high density. Whereas a standard rack-mount server can exist with
(at least) a power cord and network cable, blade servers have many components
removed for space, power and other considerations while still having all the
functional components to be considered a computer .A blade enclosure provides
services such as power, cooling, networking, various interconnects and
management - though different blade providers have differing principles around
what should and should not be included in the blade itself (and sometimes in
the enclosure altogether). Together these form the blade system.
Contents
1.ABSTRACT
2.INTRODUCTION
3.WHAT ARE BLADESERVERS?
• BLADE
ENCLOSURE
• POWER
• COOLING
• NETWORKING
• STORAGE
• OTHER
BLADES
4.USES
5.ADVANTAGES
• AFFORDABLE
DENSITY
• FAST
DEPLOYMENT
• EASY
MAINTENANCE
• MODULAR
SCALABILITY
• FLEXIBLE
AVAILABILITY
• TECHNICAL
RAMIFICATION
6.HISTORY OF BLADESERVERS
7.CONCLUSION
8.BIBILIOGRAPHY
Networking
Computers are increasingly being produced with
high-speed, integrated network interfaces, and most are expandable to allow for
the addition of connections that are faster, more resilient and run over
different media (copper and fiber ). These may require extra engineering effort
in the design and manufacture of the blade, consume space in both the
installation and capacity for installation (empty expansion slots) and hence
more complexity. High-speed network topologies require expensive, high-speed
integrated circuits and media, while most computers do not utilise all the
bandwidth available.
The blade enclosure provides one or more network
buses to which the blade will connect, and either presents these ports
individually in a single location (versus one in each computer chassis), or
aggregates them into fewer ports, reducing the cost of connecting the
individual devices. These may be presented in the chassis itself, or in
networking blades.
Blade Server Architecture
Blade servers have introduced the concept of
modular computing. With blades, administrators no longer have to manage
multiple systems with unique management tools, hardware, etc. Blades and their
corresponding management software packages allow for true modular computing.
Dell’s blade offering centers around the DellTM PowerEdgeTM 1655MC platform. Administrators can manage
Dell blade servers using the Dell OpenManageTM
IT Assistant software that ships with the Dell blade servers. This
version of IT Assistant provides complete support for managing all Dell blade
servers, as well as other Dell servers, desktops, and portables, in an
organization's IT environment.
Systems management has taken a new direction with
the arrival of blade servers. No longer is there only the concept of a single
monolithic server, which comprises of one chassis enclosing one set of hardware
components. Now several self-contained servers, or blades, are contained within
a main chassis. Each blade has its own processor(s), memory, I/O subsystem, set
of hard drives, operating system (including instrumentation), and other basic
server components.
Easy Maintenance
All critical components of a blade server can be
made redundant or hot-swappable, including cooling systems, power supplies,
Ethernet controllers and switches, mid- and backplanes, hard disk drives and
service processors. Removing a server for maintenance just means sliding the
blade out of the chassis — it's no more complex than removing a hot-swap hard
disk drive.
Advanced blade server systems offer smart ways of
achieving highly sensitive maintenance. Some blade-server components can alert
a systems management processor of impending failure hours or even days before
failure occurs. Advanced diagnostics direct a servicer directly to a failing
part, allowing for quick, efficient restoration. Some blade servers can even be
designed to have no single point of failure.
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