I have used aws cli tool to move couple of folders named: 2014, 2015, 2016 etc from root directory:
/2015/
into:
/images/2015/
When I moved them it seems that there is one file less in each bucket:
Before copying:
After coping:
Could you help me to understand this phenomena ?
The count is probably including/excluding the 'folder object'.
Normally, there is no need to create folders in Amazon S3. Simply putting an object in a particular path (eg /images/2014 will "create" the images and 2014 folders -- they 'appear' to exist, but they actually do not exist. Deleting the objects will make the folders disappear.
However, it is possible to create a folder by clicking Create folder. This will create a zero-length object with the same name as the folder. This will force the folder to appear, even when there are no objects inside the folder.
Therefore, it is likely that the "off by 1" count of objects is related to a folder that was/wasn't created via the Create folder command. I have previously seen exactly this behaviour.
Related
I am trying to backup 2TB from a shared drive of Windows Server to S3 Glacier
There are maybe 100 folders (some may be nested ) and perhaps 5000 files (some small like spread sheets, photos and other are larger like server images. My first question is what counts as an object here?
Let’s say I have Folder 1 which has 10 folders inside it. Each of 10 folders have 100 files.
Would number of objects be 1 folder + (10 folders * 100 files) = 1001 objects?
I am trying to understand how folder nesting is treated in S3. Do I have to manually create each folder as a prefix and then upload each file inside that using AWS CLI? I am trying to recreate the shared drive experience on the cloud where I can browse the folders and download the files I need.
Amazon S3 does not actually support folders. It might look like it does, but it actually doesn't.
For example, you could upload an object to invoices/january.txt and the invoices directory will just magically 'appear'. Then, if you deleted that object, the invoices folder would magically 'disappear' (because it never actually existed).
So, feel free to upload objects to any location without creating the directories first.
However, if you click the Create folder button in the Amazon S3 management console, it will create a zero-length object with the name of the directory. This will make the directory 'appear' and it would be counted as an object.
The easiest way to copy the files from your Windows computer to an Amazon S3 bucket would be:
aws s3 sync directoryname s3://bucket-name/ --storage-class DEEP_ARCHIVE
It will upload all files, including files in subdirectories. It will not create the folders, since they aren't necessary. However, the folder will still 'appear' in S3.
I would like to create a folder structure displayed like below.
How should I specify the key?
*Top level folder would be today's date
/yyyymmdd/*.jason
e.g.
/2021-05-21/example.json
Folders do not actually exist in Amazon S3. You can create an object with any path and the folder magically 'appears'. Then, if the object is deleted, the folder will disappear. Amazon S3 calls them CommonPrefixes.
The Amazon S3 management console has a "Create Folder" button. This actually creates a zero-length object with the same name as the folder (e.g. 2021-05-21/). This 'forces' the folder to appear because there is an object inside it. However, the zero-length object is hidden in the console.
So, if you wish to 'create a folder', simply create a zero-length object with the name of the folder.
Or, better yet, do not create the folder. Just pretend that it exists and things will work perfectly fine.
After deleting a few folders in our S3 bucket, I am not able to see any of my folders through the web console. We had around 10 folders and ended up deleting 6 of them. The remaining four show up when I do an 'ls' on that S3 bucket through the CLI but the bucket shows up empty on the web console.
When I turn on 'Versions' I see everything (including the 6 folders that were deleted). Am I overlooking something extremely simple?
Folders do not actually exist in Amazon S3.
For example, you could create an object like this:
aws s3 cp foo.txt s3://my-bucket/folder1/folder2/foo.txt
This would instantly 'create' folder1 and folder2. Or, to be more accurate, the folders would 'appear' but they don't actually exist because the full filename (Key) of the object is folder1/folder2/foo.txt.
If you were then to delete that object, the folders would 'disappear' because they never actually existed.
Sometimes, if a system wants to forcefully make a folder 'appear', it can create a zero-length object with the same name as the folder. This makes the folder 'appear', but it is really the empty file that is appearing.
Bottom line: Don't worry about creating and deleting folders. They will appear when necessary and disappear when not being used. Do not try to map normal filesystem behaviour to Amazon S3.
I have to replicate my local folder structure in S3 bucket, I am able to do so but its not creating folders which are empty. My local folder structure is as follows and command used is.
"aws-exec s3 sync ./inbound s3://msit.xxwmm.supplychain.relex.eeeeeeeeee/
its only creating inbound/procurement/pending/test.txt, masterdata and transaction is not cretated but if i put some file in each directory it will create.
As answered by #SabeenMalik in this StackOverflow thread:
S3 doesn't have the concept of directories, the whole folder/file.jpg
is the file name. If using a GUI tool or something you delete the
file.jpg from inside the folder, you will most probably see that the
folder is gone too. The visual representation in terms of directories
is for user convenience.
You do not need to pre-create the directory structure. Just pretend that the structure is there and everything will be okay.
Amazon S3 will automatically create the structure as objects are written to paths. For example, creating an object called s3://bucketname/inbound/procurement/foo` will automatically create the directories.
(This isn't strictly true because Amazon S3 doesn't use directories, but it will appear that the directories are there.)
I want to rename a folder in S3 bucket, I understand that rename will run a PUT request which costs 1 cent per 1000 request.
However, the PUT request is defined as a COPY and involves with also a GET
My question is, when we rename a folder in S3 bucket, does it involve copying all sub-folders and files to a new folder with the name I want (which costs more than 1 PUT request), or it just simply 1 PUT request to change the name without touching all the items within the folder.
In case you've missed it... there are no folders in S3.
The object /pics/funny/cat.jpg is not a file called cat.jpg inside a folder called funny inside another folder called pics.
In fact, it is a file with an 18-character name: pics/funny/cat.jpg. The hierarchy shown in the console is largely for human convenience, and the ability to create new folders in the console is an illusion, also.
So, yes, renaming a "folder" actually means making a new copy of each object in the "folder," with a change to the object names to look like their are in the path.
This can be done with a PUT/COPY request ($0.005 per 1000 depending on the region) followed by a DELETE request of the old object (free). There is no corresponding GET request, because PUT/COPY is an atomic operation inside S3, so actually downloading and re-uploading the data is avoided.