WEBVTT 00:08.830 --> 00:11.400 Hello Friends will come back in this lesson. 00:11.400 --> 00:14.600 We're going to talk about red area and the liberals. 00:14.800 --> 00:19.990 So what is very real stands for it in an area of expensive yes. 00:20.080 --> 00:20.570 OK. 00:20.770 --> 00:28.050 Red is a technology which is used to improve the reliability and performance of your data storage. 00:28.450 --> 00:35.800 If you have more than one hardcase then you can implement red level Souci on that and you can increase 00:35.800 --> 00:39.670 the performance or reliability of deep data storage. 00:39.750 --> 00:43.220 OK so there are different levels of red. 00:43.330 --> 00:49.460 OK you can implement the red according to the number of hardness or on the basis of your needs. 00:49.480 --> 00:49.740 OK. 00:49.750 --> 00:53.150 So we're going to talk about each level one by one. 00:53.320 --> 00:53.930 OK. 00:53.950 --> 00:59.260 And there are different levels but we're going to talk about only important levers and which are generally 00:59.260 --> 01:01.900 used nowadays in the industry. 01:02.020 --> 01:08.000 So let's talk about the red level zero the red level 0 is a so-called I'm describing. 01:08.140 --> 01:09.790 So what is striping. 01:09.790 --> 01:12.350 Suppose you have two hard disks. 01:12.490 --> 01:13.010 OK. 01:13.210 --> 01:17.080 And on that Hudis you need to ride for TMB of data. 01:17.320 --> 01:21.050 Or you going to see a forum be of file on this desk. 01:21.100 --> 01:30.700 So what RAID 0 does is it can words that for him be filing Kukui code blocks and write the data to both 01:30.700 --> 01:32.610 the hard disk at the same time. 01:32.770 --> 01:36.070 So this technique is called striping. 01:36.070 --> 01:43.230 Suppose you have 400 days then it will convert it into four blocks and write the data at the same time. 01:43.250 --> 01:47.510 Today for hard disks OK this method is called less typing. 01:47.530 --> 01:48.670 So read 0. 01:48.820 --> 01:50.520 Uses this trappy. 01:50.620 --> 01:54.640 So what are the advantages of read zero read zero proof. 01:54.640 --> 01:58.370 It's a great performance in read and write operations. 01:58.390 --> 02:06.610 It uses all the stories capacity means so if you are using one of two hard disk then it will use both 02:06.660 --> 02:13.980 a beauty of the space for storing the data and it isn't easy to implement technology. 02:14.180 --> 02:14.690 OK. 02:14.830 --> 02:17.770 So these are the advantages of a zero. 02:17.920 --> 02:19.950 So what are the disadvantage. 02:20.020 --> 02:23.230 Are these error entities of the 0 3 0. 02:23.290 --> 02:25.880 Does not provide false tolerance. 02:25.950 --> 02:33.560 Ok suppose you have two Hydro's and one of the disk fails then you lose all the data. 02:33.790 --> 02:37.470 OK so what is the ideal use of RAID 0. 02:37.480 --> 02:41.460 The best use of RAID 0 is in the video editing was stations. 02:41.480 --> 02:49.450 Ok suppose you how a video editing company where you work on lots of videos then in such situations 02:49.450 --> 02:57.190 a RAID 0 is very useful because in video our kind of work you need a better performance for read and 02:57.190 --> 02:58.370 write operations. 02:58.630 --> 03:03.020 So in video editing workstations it will be very helpful. 03:03.260 --> 03:03.660 OK. 03:03.820 --> 03:06.250 So let's talk about the next level that is red. 03:06.250 --> 03:10.520 One the red one is our so-called Ladd's mirroring. 03:10.810 --> 03:16.660 So what is mirroring suppose you how to harness each of size one. 03:16.900 --> 03:20.560 So what it does is when you implement a read of one. 03:20.560 --> 03:29.560 So whatever data you write to this one that data is copied to this to that same amount of data is good 03:29.560 --> 03:30.840 compared to this too. 03:30.970 --> 03:34.280 So copying all of these data is called as the mirroring. 03:34.300 --> 03:39.450 So this will save your data in case of disk failure. 03:39.520 --> 03:39.870 OK. 03:39.880 --> 03:43.010 It is kind of a security or kind of a backup. 03:43.100 --> 03:43.790 OK. 03:43.840 --> 03:46.450 So what are the advantages of red. 03:46.450 --> 03:49.020 One big red one. 03:49.020 --> 03:57.880 It is a simple to implement technology and it provides a good performance and pro-ID fault tolerance. 03:58.180 --> 04:03.620 And in case of drive failure the data is good cop to be replaceable dry. 04:03.730 --> 04:05.620 Instead of rebuilding it. 04:05.680 --> 04:12.810 So when you replace the second drive then that is get copied to it. 04:12.960 --> 04:17.620 OK so what is the disadvantage of a red one. 04:17.650 --> 04:24.470 The main disadvantage of Redwine is that you can only use half of the space of both good roads. 04:24.480 --> 04:28.180 I mean suppose you how do different grades of same size. 04:28.180 --> 04:28.960 That is one way. 04:28.990 --> 04:38.980 DV So what happens is it requires one TBO space for storing the data and another one is used to copying 04:38.980 --> 04:40.340 the data. 04:40.450 --> 04:49.210 Ok so you can only use only use one TV of harddrive to store the data and another one for copying or 04:49.210 --> 04:54.440 for mirroring it proves slightly slower performance in writing. 04:54.490 --> 04:56.990 It is the disadvantage of read one. 04:57.280 --> 04:59.150 So what is the ideal use. 04:59.200 --> 05:07.210 It can be useful in small systems like accounting system ok where you want your data to be secure or 05:07.210 --> 05:12.960 you need a back offer it then it will be useful in such assistance. 05:13.060 --> 05:13.600 OK. 05:14.000 --> 05:17.460 So now let's talk about the next level that is very fine. 05:17.960 --> 05:20.980 The reg file is also called as distributed. 05:20.990 --> 05:21.590 Right. 05:21.800 --> 05:31.100 So what is what ID supports you how does for how does OK for this really well you need at least three 05:31.130 --> 05:32.130 hard drives. 05:32.180 --> 05:37.760 OK and for grade level 1 you need at least two or four or six. 05:37.760 --> 05:38.360 OK. 05:38.420 --> 05:41.250 In the lower one you cannot use three. 05:41.270 --> 05:41.830 OK. 05:41.870 --> 05:47.310 Or so on like hard numbers you need the Hydro's in multiple of two. 05:47.660 --> 05:53.550 But in case of red for you you can implement it in at least three Hydro's. 05:53.570 --> 06:01.760 You cannot implement read fire on a €200 will get support ID means it uses the one fault of the hydro 06:01.760 --> 06:06.830 for storing the data of that disk in the compressed form. 06:06.830 --> 06:10.720 Suppose you how all this does of one terabyte. 06:10.910 --> 06:16.320 So are two hundred fifty six gigabyte of this piece of it. 06:16.370 --> 06:18.700 This is usable for Friday. 06:18.920 --> 06:22.320 So the party stores the data in the compressed form. 06:22.590 --> 06:23.070 OK. 06:23.330 --> 06:28.410 And you can rebuild the data from this disk in case of disk failures. 06:28.590 --> 06:29.070 OK. 06:29.330 --> 06:35.920 So what are the advantages of read Five read operations is very fast in very fine. 06:36.170 --> 06:42.980 But like operation needs slower if you lose one of the drive then you can access all the data with the 06:42.980 --> 06:46.100 help of parady Google parade information. 06:46.100 --> 06:50.470 We can rebuild that data and care in case of red fire. 06:50.810 --> 06:53.760 It provides full fault tolerance. 06:53.920 --> 06:57.100 OK what is the disadvantage of that. 06:57.170 --> 07:03.810 It takes a long time to rebuild information or data in case of drive failure. 07:03.920 --> 07:06.170 It is of course one of the displays. 07:06.260 --> 07:14.360 It takes a long time to rebuild get that data and if more than one disk fail then you will lose all 07:14.360 --> 07:15.130 the data. 07:15.300 --> 07:15.820 OK. 07:15.950 --> 07:18.860 So these are the disadvantages of red file. 07:19.310 --> 07:27.110 So what is the ideal use of fixed it can we use it on Wise words which was which has a limited number 07:27.410 --> 07:28.670 of drives. 07:28.810 --> 07:32.590 Okay that file can be implemented on such systems. 07:32.800 --> 07:33.110 OK. 07:33.140 --> 07:40.640 Now let's talk about the next level that is red six red six is also called as I think with double parity 07:41.120 --> 07:49.330 because it uses double parity and so typing suppose you how for this. 07:49.480 --> 07:49.980 OK. 07:50.260 --> 07:56.000 So in case of Grade 6 it provides double parity on each desk. 07:56.130 --> 07:56.420 OK. 07:56.420 --> 08:01.520 Then you apply the red six red six is same as a red five. 08:01.720 --> 08:07.370 But the difference is that it is much slower than red for you. 08:07.450 --> 08:11.610 But it provides more security to double parady. 08:11.770 --> 08:12.280 OK. 08:12.520 --> 08:19.690 So let's talk about the advantages of Grade 6 like red for a read operation is very fast in the six 08:20.290 --> 08:22.440 in case of two drive failures. 08:22.450 --> 08:25.980 You can get your data back Dooku double Brighty. 08:26.050 --> 08:29.220 So it is more secure than our fight. 08:29.920 --> 08:32.200 And what are the disadvantages. 08:32.440 --> 08:32.710 Right. 08:32.710 --> 08:36.870 Operations are much slower as compared to red fire you do to double. 08:36.880 --> 08:37.550 Right. 08:37.680 --> 08:38.060 OK. 08:38.080 --> 08:40.370 Because it provides double Paradiso right. 08:40.420 --> 08:47.290 Operations are slower and even drive failure occurs then it will take a day to rebuild that data. 08:47.300 --> 08:52.250 Again it takes a long time to rebuild the data in case of drive failure. 08:52.320 --> 08:52.920 OK. 08:53.350 --> 08:58.380 If more than two go fails then you will lose all the data. 08:58.810 --> 09:05.530 You can rebuild the data in case of two grown failures but more than Google face you will lose all the 09:05.530 --> 09:07.850 data in case of 386. 09:08.140 --> 09:11.760 So what is the ideal use or what is there to resolve it. 09:11.800 --> 09:19.720 So it will be very useful in all the systems which needs excellent security and good for for once again. 09:19.930 --> 09:24.440 And it can be used in video streaming like applications. 09:24.820 --> 09:28.700 It can be very useful in video streaming like applications. 09:28.700 --> 09:34.250 Now let's talk about the last level that is a red 10 or mirror and stripe. 09:34.510 --> 09:39.580 So it then is nothing but the combination of her level 1 and zero. 09:39.670 --> 09:40.160 OK. 09:40.300 --> 09:48.700 So this combination is consisting of mirror and say Because really well one provides the mirror feature 09:48.730 --> 09:53.450 and rarely will zero produce typing feature so we can combine here. 09:53.560 --> 09:59.930 The features and so we can increase the performance and security of our data. 10:00.130 --> 10:08.880 Okay so what are the advantages offered then if discontinued of course in case of then then the rebuild 10:08.890 --> 10:11.070 time is much more faster. 10:11.080 --> 10:17.050 Suppose you how one terabyte of hard disk then it will take around 30 minutes to rebuild that data. 10:17.100 --> 10:24.640 OK it is much faster as compared to any of the levels and it provides to fault tolerance. 10:24.850 --> 10:26.430 Good performance. 10:26.830 --> 10:36.580 So what is a disadvantage as compared good five and six it is the most expensive way to redundancy because 10:36.670 --> 10:41.830 it consumes half of the disk space for mirroring out of the total capacity. 10:41.830 --> 10:42.280 OK. 10:42.460 --> 10:50.440 Because mirroring is present here so if you have for-TV hydro then you can use two terabytes of hardness 10:50.620 --> 10:54.890 for data storage and another device used for memory. 10:55.300 --> 11:02.080 So where is the ideal use or what is the ideal is that it can be used in such conditions where do you 11:02.080 --> 11:07.830 want to store database and want a high performance and availability of the data. 11:08.170 --> 11:13.780 Okay so in this lesson we learn about different grade levels and in the next lesson we are going to 11:13.780 --> 11:17.720 talk about how to implement these grade levels. 11:17.750 --> 11:21.610 Okay we're going to talk about only one of the red level which is important. 11:21.610 --> 11:23.700 So let's see in the next lesson. 11:23.950 --> 11:27.020 How do you implement the red level practically.