1 00:00:00,290 --> 00:00:04,230 It is possible for you to version your files in Amazon S3. 2 00:00:04,230 --> 00:00:05,540 And so to do this, 3 00:00:05,540 --> 00:00:07,950 you have to enable it at the bucket level. 4 00:00:07,950 --> 00:00:09,560 Okay, it is not at profile setting, 5 00:00:09,560 --> 00:00:11,850 it is a bucket level setting. 6 00:00:11,850 --> 00:00:14,940 Basically that means that if you overwrite a file 7 00:00:14,940 --> 00:00:16,530 you will increment its version. 8 00:00:16,530 --> 00:00:19,090 So when you first upload a file, it is version 1. 9 00:00:19,090 --> 00:00:20,090 Then when you overwrite it, 10 00:00:20,090 --> 00:00:22,240 it is version 2, then version 3, etc. 11 00:00:22,240 --> 00:00:24,110 And your Amazon S3 bucket 12 00:00:24,110 --> 00:00:26,660 will keep all the versions in mind. 13 00:00:26,660 --> 00:00:29,026 It is best practice, to be honest, to version your bucket. 14 00:00:29,026 --> 00:00:29,860 Why? 15 00:00:29,860 --> 00:00:31,580 Well, because you can protect yourself 16 00:00:31,580 --> 00:00:33,280 against unintended deletes. 17 00:00:33,280 --> 00:00:36,100 Basically you're able to restore a previous version. 18 00:00:36,100 --> 00:00:38,920 And you can easily roll back to your previous version 19 00:00:38,920 --> 00:00:40,630 in case there was any problem. 20 00:00:40,630 --> 00:00:43,040 So this is quite best practice, to version your buckets. 21 00:00:43,040 --> 00:00:44,900 The only downside is that you use a bit more 22 00:00:44,900 --> 00:00:46,803 space on your Amazon S3 bucket. 23 00:00:47,710 --> 00:00:50,130 Finally, any file that is not versioned 24 00:00:50,130 --> 00:00:51,820 prior to enabling the versioning, 25 00:00:51,820 --> 00:00:53,510 will have the version null. 26 00:00:53,510 --> 00:00:54,760 And this is just something that you should know 27 00:00:54,760 --> 00:00:56,780 in case they ask this at the exam. 28 00:00:56,780 --> 00:00:59,340 So let's go ahead and practice this in the hands-on. 29 00:00:59,340 --> 00:01:00,860 So I'm in my S3 bucket. 30 00:01:00,860 --> 00:01:02,480 And I will go to properties 31 00:01:02,480 --> 00:01:04,400 click on versioning, and as you can see, 32 00:01:04,400 --> 00:01:06,100 I can enable versioning. 33 00:01:06,100 --> 00:01:09,363 Then I click on save and it says enabled. 34 00:01:10,680 --> 00:01:12,440 Then I go back to overview 35 00:01:12,440 --> 00:01:13,610 and now you should be seeing 36 00:01:13,610 --> 00:01:18,320 a versions hide and show type of toggle, right here. 37 00:01:18,320 --> 00:01:19,230 So I'll click on show 38 00:01:19,230 --> 00:01:21,400 and if you don't see this, refresh the page, 39 00:01:21,400 --> 00:01:22,860 go back to your properties and refresh this. 40 00:01:22,860 --> 00:01:25,540 Sometimes it takes a bit of time to enable versioning. 41 00:01:25,540 --> 00:01:27,490 So you go to overview and you show the versions. 42 00:01:27,490 --> 00:01:30,490 And the first thing we see is that the coffee.jpg file, 43 00:01:30,490 --> 00:01:33,370 that was uploaded before we enabled versioning 44 00:01:33,370 --> 00:01:35,420 has a version ID null. 45 00:01:35,420 --> 00:01:37,430 So we just saw this in the lecture. 46 00:01:37,430 --> 00:01:40,010 Now if I open a file, add a file 47 00:01:40,010 --> 00:01:44,260 and make this file my beach.jpg, upload it. 48 00:01:44,260 --> 00:01:47,180 As you can see my first beach is here 49 00:01:47,180 --> 00:01:49,330 and has a version ID like this. 50 00:01:49,330 --> 00:01:50,970 So I did an oversimplification 51 00:01:50,970 --> 00:01:52,210 when I said version 1, 2 and 3 52 00:01:52,210 --> 00:01:54,940 but you get the idea that basically your file 53 00:01:54,940 --> 00:01:56,750 gets a new version every time. 54 00:01:56,750 --> 00:01:59,550 So if I go ahead and re-upload the very same file, 55 00:01:59,550 --> 00:02:02,730 so add a file and re-upload that beach, 56 00:02:02,730 --> 00:02:04,220 basically you can see that now 57 00:02:04,220 --> 00:02:06,570 the new version has a new version ID. 58 00:02:06,570 --> 00:02:09,870 And it overridden the version from before. 59 00:02:09,870 --> 00:02:10,940 So we can look at the timestamps 60 00:02:10,940 --> 00:02:13,567 and see that this one was created at 35:59pm 61 00:02:13,567 --> 00:02:16,050 and this one is 35:40pm, okay. 62 00:02:16,050 --> 00:02:17,590 So we see different versions. 63 00:02:17,590 --> 00:02:20,330 So we can go ahead and upload as many versions as you want. 64 00:02:20,330 --> 00:02:22,490 So we can re-upload the beach. 65 00:02:22,490 --> 00:02:23,650 I'll go ahead and re-upload the beach 66 00:02:23,650 --> 00:02:28,010 and I'll also go ahead and upload a coffee.jpg 67 00:02:28,010 --> 00:02:29,310 just see how things work. 68 00:02:29,310 --> 00:02:33,500 And as we can see now, even the coffee gets a version ID. 69 00:02:33,500 --> 00:02:35,740 So basically as we have versioning, 70 00:02:35,740 --> 00:02:39,800 now every object version gets kept into the bucket. 71 00:02:39,800 --> 00:02:41,630 If we hide the version we only see 72 00:02:41,630 --> 00:02:43,400 the latest version in our UI. 73 00:02:43,400 --> 00:02:46,870 But if we show the version we can see all the version IDs. 74 00:02:46,870 --> 00:02:48,400 The other thing that's super interesting 75 00:02:48,400 --> 00:02:49,730 is that if I delete my files 76 00:02:49,730 --> 00:02:53,130 so let's go ahead and right-click and delete my file, 77 00:02:53,130 --> 00:02:55,270 and I say yes, I want to delete it, 78 00:02:55,270 --> 00:02:58,090 it looks like it's gone if I hide the versions. 79 00:02:58,090 --> 00:03:00,350 But if I show the versions we can see 80 00:03:00,350 --> 00:03:01,790 that the only thing that happened 81 00:03:01,790 --> 00:03:04,510 is that there was a delete marker on that file. 82 00:03:04,510 --> 00:03:07,580 And so basically I'm able to restore it if I wanted to. 83 00:03:07,580 --> 00:03:09,017 So here is the download file 84 00:03:09,017 --> 00:03:11,160 and I could restore it if I wanted to. 85 00:03:11,160 --> 00:03:13,620 But the idea is that now that you have versioning 86 00:03:13,620 --> 00:03:16,307 when you delete a file, it just puts a delete marker on it 87 00:03:16,307 --> 00:03:19,360 and just creates a new version of that file for you. 88 00:03:19,360 --> 00:03:20,710 So that's it for versioning. 89 00:03:20,710 --> 00:03:21,980 It's all you need to know. 90 00:03:21,980 --> 00:03:23,340 Just remember you create new versions 91 00:03:23,340 --> 00:03:25,110 every time you upload a file. 92 00:03:25,110 --> 00:03:27,250 When you delete a file it's just not really deleted. 93 00:03:27,250 --> 00:03:29,150 It has a delete marker on it. 94 00:03:29,150 --> 00:03:30,900 And when you enable versioning, 95 00:03:30,900 --> 00:03:35,380 any file that wasn't versioned before, has the null version. 96 00:03:35,380 --> 00:03:36,213 So, I hope that was helpful. 97 00:03:36,213 --> 00:03:38,960 Hope that helps and I will see you in the next lecture.