Blade chassis vs rack mount

http://www.zdnet.com/blog/virtualization/blades-vs-standard-racked-servers-for-virtualization/4923

Rack mount

Blade server

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QoS Parameters

TechNet Link – simple and lucid

QoS Parameters
Different applications have different requirements regarding the handling of their traffic in the network. Applications generate traffic at varying rates and generally require that the network be able to carry traffic at the rate at which they generate it. In addition, applications are more or less tolerant of traffic delays in the network and of variation in traffic delay. Certain applications can tolerate some degree of traffic loss while others cannot. These requirements are expressed using the following QoS-related parameters:
• Bandwidth – the rate at which an application’s traffic must be carried by the network
• Latency – the delay that an application can tolerate in delivering a packet of data
• Jitter – the variation in latency
• Loss – the percentage of lost data

XOR

http://www.javamex.com/java_equivalents/unsigned.shtml

This post is motivated by an interesting article posted above.

Also interesting uses of XOR can be found in the form of XOR swap (no-temp-swap) and XOR linked list (Doubly linked list with a single variable to store both the prev and next pointers)

Following properties of XOR are what makes it very powerful –

X^X=O (Zero) – common sense (a value xor’d with itself is bound to be zero)

X^O = X = identity

X^Y = Y^X  = Reflexivity

X^(Y^Z) = (X^Y)^Z = transitivity