Blade Servers
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computer science crazy
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#1
22-09-2008, 10:27 AM


Definition
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.

In a standard server-rack configuration, 1U (one rack unit, 19" wide and 1.75" tall) is the minimum possible size of any equipment. The principal benefit of, and the reason behind the push towards, blade computing is that components are no longer restricted to these minimum size requirements. The most common computer rack form-factor being 42U high, this limits the number of discrete computer devices directly mounted in a rack to 42 components. Blades do not have this limitation; densities of 100 computers per rack and more are achievable with the current generation of blade systems.

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.

The benefits of the blade approach will be obvious to anyone tasked with running down hundreds of cables strung through racks just to add and remove servers. With switches and power units shared, precious space is freed up - and blade servers enable higher density with far greater ease Server blade
In the purest definition of computing ,a computer requires only; memory to read input commands and data a processor to perform commands manipulating that data, and
memory to store the results.

Today these are implemented as electrical components requiring power, and in operation produce heat. Other components such as hard drives, power supplies, storage and network connections, basic IO such as Computer keyboard, Computer display, Mouse_ serial_port etc. only support the basic computing function, yet add bulk, heat and complexity, not to mention moving parts that are more prone to failure than solid-state components.

In practice, these components are all required if the computer is to perform real-world work. In the blade paradigm, most of these functions are removed from the blade computer, being either provided by the blade enclosure (e.g. DC power supply, virtualised storage, remote console over IP) or discarded entirely (e.g. serial ports). The blade itself becomes vastly simpler, hence smaller and (in theory) cheaper to manufacture.

The enclosure (or chassis) performs many of the non-core computing services found in most computers. Non-blade computers require components that are bulky, hot and space-inefficient, and duplicated across many computers that may or may not be performing at capacity. By locating these services in one place and sharing them between the blade computers, the overall utilisation is more efficient. The specifics of which services are provided and how vary by vendor.
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jithu27
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18-12-2010, 05:47 PM

pls send me a full report
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18-12-2010, 07:10 PM

A blade server is a stripped down server computer with a modular design optimized to minimize the use of physical space and energy. minimize power consumption space and many other components have been done as compared with the normal rack servers. multiple blade servers can be held on a blade enclosure and can be provided with services such as power, cooling, networking, various interconnects and management.These together form a blade system. With the high cost of data center floor space and current advances in technology, new installations with denser cabinets that require more power and cooling continues to be the trend. The blade server comes into use in this scenario.

the minimum possible size of any equipment is 1U in the rack system. The lifting of this restriction is the main aim of the blade server system.

Blade enclosure
The functions and services provided are:
Power:utilities deliver power as AC
Cooling:removal of heat by using fans.
Networking:high-speed, integrated network interfaces are included:

get the details here:
en.wikipediawiki/Blade_server
servertechuploads/documents/0000/0091/Blade_Server_Solutions.pdf
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seminar class
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#4
01-04-2011, 10:20 AM


Presented By
Harshal Ghule


.ppt   Blade Server.ppt (Size: 1.4 MB / Downloads: 78)
INTRODUCTION
 What is the difference between a server and a blade server?
 A blade server is a stripped down server computer with a modular design optimized to minimize the use of physical space and energy.
 Price: entry-level server blade for some $700 , . Entry-level chassis start at around $2,500 , When you add the cost of support, setup, infrastructure, cooling, maintenance, and other, you can easily get to $20,000 for an entry-level blade server just to start.
DELL BLADE SERVER
 Step 1
Integrate Servers
A QUICK COMPARISION
 Cables reduction by 87%
 HP BLADE SERVER Vs RACK_MOUNT SERVER
ENCLOSURE/CHASSIS
 Chassis refers to any backplane module that has empty slots where
the front end modules (like blade servers) & add-on modules can be inserted.
o The major components of the Blade Server Chassis are listed below:
 Server modules (Blades) with Multi-Core Processors, RAM, hard disks, etc. These blades are inserted in to the empty front end slots of the Chassis.
 Common Power Supply Modules.
 Common Fan/Cooling Modules.
 Midspan connections (usually specialized cables) that connect specific add-on/integrated Chassis modules and Blade modules.
 Common Input/Output expansion modules (Eg. PCI Express modules).
 Specialized expansion modules (Like RAID expansion modules, etc).
 Storage Module(s).
 Networking Module(s) (Switch ports, Ethernet cables, etc).
HARDWARE CONFIGERATION OF BLADE SERVERS
 Chassis (exterior):
The components of blade servers are placed in a chassis. The chassis can hold a number of server blades. This blades can be switched and we can use it by user’s convenience. Intel corporation had made a blade server chassis which can hold up to 30 servers.
 Components in chassis :
 Server blade
 Switch blade
 Management blade:
The management blade is to manage the blades in the chassis.The management of blades is the main issue of using blade servers.
HARDWARE CONFIGERATION OF BLADE SERVERS
 CPU: Central processing unit
 NIC: Network interface card
 Middle plane:
Middle plane is for connecting the switch blades.Swich blades are the switches in which server blades are connected.
 NIC Hard disk
 Memory
 CPU
 Figure will explain the hardware configuration of blade servers.
ISSUES
Business systems that use blade servers have a large number of server blades, and when a large number are in use, it is important to ensure they do not degrade system reliability. Although many factors can degrade a system’s reliability, the most important ones to consider are:
1) Hardware faults.
2) Software faults.
3) Insufficient resources to deal with unexpected load increases.
4) Human error.
Features
1. To reduce power consumption.
2. Simplified deployment and maintenance.
3. To maximize the use of data center space
4. Lower hardware costs
APPLICATION
Blade servers can be found in many applications, such as
 Web page serving and caching
 SSL encrypting of Web communication
 Infrastructure applications such as DNS or Active Directory
 Streaming audio and video content
 File sharing and serving
 Terminal services
 Email messaging
 Databases hosting (Ms SQL, Oracle)
 ERP hosting (for example SAP)
 Virtualization (VMWare, Microsoft Virtual Server, etc.)
Disadvantages
 Expensive configuration
 Expensive tool, i.e. economies of scale
 Vendor-lock
 Business case
 Heating and cooling
BENEFITS OF BLADE SERVER
 Condensed, high-density
 Load balancing and failover
 Power consumption & power management
 Lower management cost
 Network and other cabling
 Flexibility, modularity, and ease of upgrading
 Deployment and scalability
 Disaster management
FUTURE DEVELOPMENTS
 In the future, systems themselves will perform analysis,make decisions autonomously based on business requirements, and reconstruct systems organically.
 The key technologies for achieving these functions are considered to be system composition and autonomic control .
BLADE SERVER TECHNOLOGY OVERVIEW
CONCLUSION

 Blade servers can greatly improve the reliability of business systems.
 Provisioning realizes swift action and efficient resource utilization when faults and load increases occur.
 In order to realize provisioning, resource management for configuration management, pool management, and automation is indispensable.
 System walker Resource Coordinator offers provisioning solutions on blade servers.
 In the future, provisioning solutions will have extended support ranges and these new solutions will form the basis of autonomic provisioning.
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