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‫So, now let's talk about versioning

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‫in Amazon S3.

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‫Because we've seen how to create a website,

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‫but it would be nice to be able to update it in a safe way.

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‫So, you can version your files in Amazon S3,

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‫and this is a setting you have to enable

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‫at the bucket level.

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‫So, we have my bucket and it's enabled with versioning.

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‫So, whenever a user uploads a file,

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‫it's going to create a version of that file

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‫at the selected key.

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‫And then should we re-upload the same key,

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‫should we overwrite that file,

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‫then instead it's going to create a version two,

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‫and then a version three, and so on.

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‫So, therefore, it is best practice to version your buckets.

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‫Why?

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‫Well, the first thing is that it protects

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‫against unintended deletes.

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‫So, for example, if you delete a file version,

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‫actually you just add a delete marker

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‫and therefore you can restore versions

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‫that were previously there instead.

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‫You can also easily roll back to a previous version.

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‫So, if you want to go back to what happened two days ago,

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‫you can take a file and roll it back.

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‫So, there are some notes you need to be aware of.

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‫First of all, that any file that is not versioned

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‫prior to enabling versioning will have the version null.

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‫And also that if you suspend versioning,

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‫it does not delete the previous version,

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‫so, it's a safe operation.

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‫Okay, so now let's go into the console

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‫and have a look at how we can use versioning.