Hello Friends this time I am going to provide you some basic useful information on Windows Server 2008 R2 (It's my favourite Topic after all :) so be attentive) .I think every time a question might arise in your mind that what is this all Windows Server ,Windows Xp ,Windows 7 ,Vista ,Windows Azure.Don't Worry I will tell you all about this just concentrate on the blog.
Guys These are the operating systems developed according to the usage and requirements.Like Windows 7,Vista ,Xp are basically used as a client operating systems and Windows Server is developed for the server environment .It can be a DHCP server or DNS Server or WINS server as per your need.Now lets talk about Windows Server 2008 R2 .
The Windows Server 2008 R2 is a Server Operating system which Provides you a Server environment and Platform.Till now Microsoft has released 4 Major Windows Server Versions i.e
1.) Windows server 2003(Released in 2003)
2.)Windows Server 2003 R2(Released in 2005)
3)Windows Server 2008(Released in 2008)
4)Windows Server 2008 R2(Released in 2009)
Now you might be thinking that What is this "R2"?
So the R2 is basically used for the 64 Bit Windows Server OS means Release Refinement.
So Windows Server 2003 R2 and Windows Server 2009 R2 is basically for the 64 Bit Versions.
Now whats new in Windows Server 2008 R2.( Please give attention on this section as this will cover the major portion of the Windows Server 2008 R2)
Virtualisation
Hyper-V with Live Migration
Hot Add/Remove Virtual Machine Storage
Remote Desktop Services
The new Hyper-V is an enabling technology for the marquee feature of Windows Server 2008 R2: Live Migration. This allows virtual machines to be moved between failover cluster nodes without interruption of services provided by the virtual machines. The users connected to the virtual machine being moved will notice only a slight drop in performance for a few moments. Otherwise, they will be unaware that the virtual machine was moved from one physical computer to another.
In a typical live migration a user is connected to a VM on cluster node 1. An administrator begins the live migration which copies the VM’s config data from node 1 to node 2. It then takes an initial memory snapshot and moves that to node 2. But because users are still connected and interacting with node 1, this memory state changes. To keep the migration seamless, node 1 and node 2 must perform a memory sync. When the two are completely in sync, node 1 goes offline and user 1 is instantly connected to node 2 with no service interruption or perceived downtime.
While not a requirement, Live Migration can make good use of the new Cluster Shared Volumes feature in failover clustering. The Cluster Shared Volumes feature supports a file system that is shared between cluster nodes. The Cluster Shared Volumes feature is implemented as a filter driver in Windows Server 2008 R2. Live Migration allows you to perform maintenance on the original physical computer by moving the virtual machines on that computer to another physical computer. Because you have no disruption of service, high user uptime is maintained.
Scalability Features in Hyper-V
*Hyper-V can use 64 of the logical processor presented to the host server
*Increases VM server density and means an easy time assigning multiple CPUs to VMs
*Allows Live Migration across different CPU versions in the same processor family (AMD-to-AMD; Intel-to-Intel).
*Supports new CPU features to improve overall Hypervisor performance (NPT; EPT)
*Improves memory management and heavy workload performance (SQL).
Hot Add/Remove Storage
Overview
Add and remove storage to virtual machines on the fly without requiring a reboot.Hot
Add/remove disk applies to VHDs and pass-through disks attached to the virtual SCSI
controller
Benefits
Adds to the dynamic IT infrastructure
Enables storage growth in VMs without downtime
Enables additional datacenter backup scenarios
I know its very boring now but the interesting topic will begin now so stay connected :)
Combined values With Windows 7
The Windows Server 2008 R2 Provides us two new Features which can be only used if the clients are using Windows 7 OS.
1)Branch Cache
2)Direct Access
Branch Cache
The situation toady is as following:
*Application and data access over WAN is slow in branch offices
*Slow connections hurt user productivity
*Improving network performance is expensive and difficult to implement
With Branch Cache Feature
*Caches content downloaded from file and Web servers
*Users in the branch can quickly open files stored in the cache
*Frees up network bandwidth for other uses.
Direct Access
Situation Today
*Difficult for users to access corporate resources from outside the office
*Challenging for IT to manage, update, patch mobile PCs while disconnected from company network.
With Direct Access
*New network paradigm enables same experience inside & outside the office
*Seamless access to network resources increases productivity of mobile users
*Infrastructure investments also make it easy to service mobile PCs anddistribute updates and polices
So I am assuming that you have got a clear snapshot of the Windows Server 2008 R2 and its Features. Dont hesitate to ask me any question about the Windows Server 2008 or Cloud Computing.Do mail me your doubts I will try to clarify it.
Jayesh Maduskar
jayesh.maduskar@msptechrep.com
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