Hello Friends will come back in this lesson.
We're going to talk about red area and the liberals.
So what is very real stands for it in an area of expensive yes.
OK.
Red is a technology which is used to improve the reliability and performance of your data storage.
If you have more than one hardcase then you can implement red level Souci on that and you can increase
the performance or reliability of deep data storage.
OK so there are different levels of red.
OK you can implement the red according to the number of hardness or on the basis of your needs.
OK.
So we're going to talk about each level one by one.
OK.
And there are different levels but we're going to talk about only important levers and which are generally
used nowadays in the industry.
So let's talk about the red level zero the red level 0 is a so-called I'm describing.
So what is striping.
Suppose you have two hard disks.
OK.
And on that Hudis you need to ride for TMB of data.
Or you going to see a forum be of file on this desk.
So what RAID 0 does is it can words that for him be filing Kukui code blocks and write the data to both
the hard disk at the same time.
So this technique is called striping.
Suppose you have 400 days then it will convert it into four blocks and write the data at the same time.
Today for hard disks OK this method is called less typing.
So read 0.
Uses this trappy.
So what are the advantages of read zero read zero proof.
It's a great performance in read and write operations.
It uses all the stories capacity means so if you are using one of two hard disk then it will use both
a beauty of the space for storing the data and it isn't easy to implement technology.
OK.
So these are the advantages of a zero.
So what are the disadvantage.
Are these error entities of the 0 3 0.
Does not provide false tolerance.
Ok suppose you have two Hydro's and one of the disk fails then you lose all the data.
OK so what is the ideal use of RAID 0.
The best use of RAID 0 is in the video editing was stations.
Ok suppose you how a video editing company where you work on lots of videos then in such situations
a RAID 0 is very useful because in video our kind of work you need a better performance for read and
write operations.
So in video editing workstations it will be very helpful.
OK.
So let's talk about the next level that is red.
One the red one is our so-called Ladd's mirroring.
So what is mirroring suppose you how to harness each of size one.
So what it does is when you implement a read of one.
So whatever data you write to this one that data is copied to this to that same amount of data is good
compared to this too.
So copying all of these data is called as the mirroring.
So this will save your data in case of disk failure.
OK.
It is kind of a security or kind of a backup.
OK.
So what are the advantages of red.
One big red one.
It is a simple to implement technology and it provides a good performance and pro-ID fault tolerance.
And in case of drive failure the data is good cop to be replaceable dry.
Instead of rebuilding it.
So when you replace the second drive then that is get copied to it.
OK so what is the disadvantage of a red one.
The main disadvantage of Redwine is that you can only use half of the space of both good roads.
I mean suppose you how do different grades of same size.
That is one way.
DV So what happens is it requires one TBO space for storing the data and another one is used to copying
the data.
Ok so you can only use only use one TV of harddrive to store the data and another one for copying or
for mirroring it proves slightly slower performance in writing.
It is the disadvantage of read one.
So what is the ideal use.
It can be useful in small systems like accounting system ok where you want your data to be secure or
you need a back offer it then it will be useful in such assistance.
OK.
So now let's talk about the next level that is very fine.
The reg file is also called as distributed.
Right.
So what is what ID supports you how does for how does OK for this really well you need at least three
hard drives.
OK and for grade level 1 you need at least two or four or six.
OK.
In the lower one you cannot use three.
OK.
Or so on like hard numbers you need the Hydro's in multiple of two.
But in case of red for you you can implement it in at least three Hydro's.
You cannot implement read fire on a €200 will get support ID means it uses the one fault of the hydro
for storing the data of that disk in the compressed form.
Suppose you how all this does of one terabyte.
So are two hundred fifty six gigabyte of this piece of it.
This is usable for Friday.
So the party stores the data in the compressed form.
OK.
And you can rebuild the data from this disk in case of disk failures.
OK.
So what are the advantages of read Five read operations is very fast in very fine.
But like operation needs slower if you lose one of the drive then you can access all the data with the
help of parady Google parade information.
We can rebuild that data and care in case of red fire.
It provides full fault tolerance.
OK what is the disadvantage of that.
It takes a long time to rebuild information or data in case of drive failure.
It is of course one of the displays.
It takes a long time to rebuild get that data and if more than one disk fail then you will lose all
the data.
OK.
So these are the disadvantages of red file.
So what is the ideal use of fixed it can we use it on Wise words which was which has a limited number
of drives.
Okay that file can be implemented on such systems.
OK.
Now let's talk about the next level that is red six red six is also called as I think with double parity
because it uses double parity and so typing suppose you how for this.
OK.
So in case of Grade 6 it provides double parity on each desk.
OK.
Then you apply the red six red six is same as a red five.
But the difference is that it is much slower than red for you.
But it provides more security to double parady.
OK.
So let's talk about the advantages of Grade 6 like red for a read operation is very fast in the six
in case of two drive failures.
You can get your data back Dooku double Brighty.
So it is more secure than our fight.
And what are the disadvantages.
Right.
Operations are much slower as compared to red fire you do to double.
Right.
OK.
Because it provides double Paradiso right.
Operations are slower and even drive failure occurs then it will take a day to rebuild that data.
Again it takes a long time to rebuild the data in case of drive failure.
OK.
If more than two go fails then you will lose all the data.
You can rebuild the data in case of two grown failures but more than Google face you will lose all the
data in case of 386.
So what is the ideal use or what is there to resolve it.
So it will be very useful in all the systems which needs excellent security and good for for once again.
And it can be used in video streaming like applications.
It can be very useful in video streaming like applications.
Now let's talk about the last level that is a red 10 or mirror and stripe.
So it then is nothing but the combination of her level 1 and zero.
OK.
So this combination is consisting of mirror and say Because really well one provides the mirror feature
and rarely will zero produce typing feature so we can combine here.
The features and so we can increase the performance and security of our data.
Okay so what are the advantages offered then if discontinued of course in case of then then the rebuild
time is much more faster.
Suppose you how one terabyte of hard disk then it will take around 30 minutes to rebuild that data.
OK it is much faster as compared to any of the levels and it provides to fault tolerance.
Good performance.
So what is a disadvantage as compared good five and six it is the most expensive way to redundancy because
it consumes half of the disk space for mirroring out of the total capacity.
OK.
Because mirroring is present here so if you have for-TV hydro then you can use two terabytes of hardness
for data storage and another device used for memory.
So where is the ideal use or what is the ideal is that it can be used in such conditions where do you
want to store database and want a high performance and availability of the data.
Okay so in this lesson we learn about different grade levels and in the next lesson we are going to
talk about how to implement these grade levels.
Okay we're going to talk about only one of the red level which is important.
So let's see in the next lesson.
How do you implement the red level practically.