M. C s a Windows server 2012 Exam for 12. Configuring advanced windows Server 2012 Service is marginal. Tain in this module, we're gonna be looking at implementing fail over clustering
Less than one has to do it. Overview of fellow bar cluster and we're going to carry overview of fellow about clustering
We're going to get stuff such as What is I Availability
Fill of our cross to improve many Windows Server 2012
Unless in two we're gonna look are implemented fill of our clustering
and then we'll have the lab
Lesson one of a view of Phil of are clustered What is I availability? High availability is very important.
Past characteristics off many I t system
One of the most important is availability
availability We frost the level of service that application service of system provide
Everybody wants their system Toby up 24 7
3 65 days a year or 3 66 days in a leap year
But sometimes they're hard to attain that.
So our availability so so system are available
more than 90 you know Means the service are Belmont. I'm 99% of the time.
I availability requirements. They're far from one system to another.
there's some. There's a measurement we use for availability. For example, we have 99
0.9% of ability of a one year period
allow for 8.75 hours off downtime. Talk about unplanned downtime.
But the most important thing is we're gonna make sure our service is are available.
Applications are available to authorize user when it's needed.
Like I said, nobody wants it down time.
Phil Over crossed her improvement window. Several 2012 includes
Um, for example, we December 2012 they feel of our crossed yr can have 64 physical notes physical machines on. They can run 1000 virtual machines each.
That means each note kind around that
this is a significant improvement for Windows Server 2008. The only allow 16 physical knows any 1000 virtual machine part cluster
also cluster our way. Updating
That's a new feature in Windows 7 2012
What does that do? Is a new technology to allow you to update your cross the nodes
with Mike Microsoft Hot fix off the hot fix
by still keeping a crossed online. I'm that way you minimize downtime.
Also, we have our integration. We have active directory integration, improvement.
for example, you know, since 2008 meters server 2008 fill of are clustered has been integrated with active directory Domain service's. But in 2012 there's been an improvement.
Now administrators can create cross the computer objects, you know, use
or by defaulting the symbol you as a close to node.
Also, we have management improvement.
You know, if you look at it,
ah, fit of are crossed in 2012 uses similar
Management Council so such as the ones we have a window 7 2008
board is some also some management improvements.
Um, for example, we have now part new partial command. Let's we can use to manage. Our klosters
became might across the retro machines applications
on Also, we can create Islay available ice cozy
Now, Phil, over cross the components.
If Phil of our cluster You know, Dr Joe knows a group of independent computers that work together to increase availability off application and service is
physical cables and software connected close to server known as notes.
If one of the nodes are computer should fail another Notre Computer begins to provide service. This is called Fell Over.
That's what got components that we have in fell of a cluster.
One of the main components is the note.
These are computers that a member of the feel of a cluster
these computers won't cross to service is this. Computers are resource is an application applications associated with a cluster.
Then we have a network, which is our component.
um, network, allow the crossed her to communicate with one another on with the clients machines that could use the cluster
resource is enchanted as hosted by a node.
The resource is managed by across the service can be stopped, can be started, are moved to another node.
Then we have it crossed storage
the story systems usually shared between crossers.
You know, in some scenarios, such as close to a service running
Microsoft makes jinx server.
You know it was here. I'm
If you're running my Microsoft Exchange service, she s storage is not required.
Crites These are computers or users that utilize the close to service.
Then we have another components such as, ah, service application.
This is the software
um entity does presented to declines are used by day clients.
Then we have a witness.
Witness can be a file share or distance used to maintain quorum.
Normally, the witness will be located on the network that is both logically and physically separate from those used by the feel of a cross. Her
the witness must remain accessible. Toe across the node members.
Next topic we're gonna talk to be talking about is what I fail over and fail back.
Fell over trying to start a restaurant's beauty of providing access to resource is in across there. From one note to another,
I will feel over occur. Let's look at it,
Philo are Carl Wended knows that scar anklets servicing
the clients become inactive for any reason. Maybe crash or something
like that. Ah went offline for some reason.
Our fellow our cause
what? Sometimes when the administrator forces, they fell over
by moving service, bringing a note out of service
or one of the resource within the instance fails.
What is a quorum is an ex topic.
It Karam is a number of elements that must be online for across the to continue running
each element can vote
can cast one vote to determine where that across to continue to run
No, it is an element,
you know, you know, and each cost owners and Amanda has one vote it across to know it wasn't as one vote
in case there's an even number notes, Then an additional element, which known as Witness, is assigned to the cluster.
The witness element can be either disc all file share.
So Karami's based on votes in window 7 2012
Quorum allows no notes, far shares or share days to have a vote.
You know, depend on decorum. Mood, of course.
Quorum and nibbles the feel of across her to remain in line when sufficient votes are available.
Next time we go look at now, it's star fell over across to storage.
Their fill of across the storage
requires *** stories to provide consistent data
to virtual server after feel over
your *** story. Options could include
Syria attacks, cozy ice cores it, which is Internets, cozy
fiber, China. Or she had V H. D. X,
which is available Windows server 2012. Really stupid.
You can also implement cross the story space
to achieve our availability at his story level.
So we are bash. She, um such cereal,
Scott. See? ***. Um,
but you took about in chapter two. I think.
We have fiber China.
We have a shared V x v H D x.
Those are the storage is,
um, that I available which
Philip Clustering Windows Server 2000 and 12.