Is it possible to ensure that all files created in iCloud container have unique filenames? I can imagine that with many devices running I will eventually stumble upon the files created with the same name on a number of devices.
Certainly the easiest solution would be to prepend all filenames with hour/minute/second, but I'd like to maintain a nice file structure where files in conflict would be renamed with version #.
In my case I organize file storage by month and year and so within each months file are named as File 1, File 2, File 3... File n.
I found that iCloud automatically renames files created with the same name on different devices. iCloud numbers files if it spots the digit at the end of file name, e.g. if file File - 1337.jpg was created twice on different devices, then after sync one file or another will be renamed to File -1338.jpg automatically.
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I am using Azure data Lake Store for files Storage. I am using operations like
Creating a main file
Creating part files
Appending these part files to main file (for Concurrent append)
Example:
There is main log file (eventually will contain logs from all
programs)
There are part log file that each program creates solely and then
append to the main log file
The workflow runs really file but i have noticed some unknown file getting uploaded onto the store directory. These files name is a GUID an has no extension, moreover these unknown files are empty.
Does anyone knows what might be the reason for these extra files.
Thanks for reformatting your question. This looks like some processing artefacts that probably will disappear shortly after. How did you upload/create your files?
When I upload files via dropzone and save them, I add order number to the names of files (file_name_1, file_name_2, ...). How do I do that? Existing number of files in folder + 1. But... files in dropzone are being uploaded in parallel mode, so it is possible that number for two file will be the same and one file rewrite another. I think that it would be a good idea to take some order number of file from dropzone and send it to server. How can I do that?
I am wondering the best way to achieve de-duplicated (single instance storage) file storage within Amazon S3. For example, if I have 3 identical files, I would like to only store the file once. Is there a library, api, or program out there to help implement this? Is this functionality present in S3 natively? Perhaps something that checks the file hash, etc.
I'm wondering what approaches people have use to accomplish this.
You could probably roll your own solution to do this. Something along the lines of:
To upload a file:
Hash the file first, using SHA-1 or stronger.
Use the hash to name the file. Do not use the actual file name.
Create a virtual file system of sorts to save the directory structure - each file can simply be a text file that contains the calculated hash. This 'file system' should be placed separately from the data blob storage to prevent name conflicts - like in a separate bucket.
To upload subsequent files:
Calculate the hash, and only upload the data blob file if it doesn't already exist.
Save the directory entry with the hash as the content, like for all files.
To read a file:
Open the file from the virtual file system to discover the hash, and then get the actual file using that information.
You could also make this technique more efficient by uploading files in fixed-size blocks - and de-duplicating, as above, at the block level rather than the full-file level. Each file in the virtual file system would then contain one or more hashes, representing the block chain for that file. That would also have the advantage that uploading a large file which is only slightly different from another previously uploaded file would involve a lot less storage and data transfer.
I'm building a website that will involve a lot of uploaded files. Hopefully, more than I intend for there to be.
I figured I'd have an uploaded files path and use a UUID as the filename. I was curious if there are any limitations on this? For instance, would storing thousands of files in the one folder on my server create problems?
There are quite many issues that couldappear, from file system limitations to backup problems.
I suggest using the first X characters of tue UUIS as folder name - possibly multiple levels deep (first 4, second 43, third 4). This way you have one structure but can back up folders and move them to different servers if needed later (by using the folders as redirection points).
I am attempting to add a document storage module to our AR software.
I will be prompting the user to attach a doc/image to thier account. I will then put a copy of this file into our folder so that we can reference it without having to rely on them keeping the file in its original place. This system is not using a database but instead its using multiple flat files.
I am looking for guidance on how to handle these files once they have attached them to our system.
How should I store these attached files?
I was thinking I could copy the file over to a sub directory then renaming it to a auto-generated number so that we do not have duplicates. The bad thing about this, is the contents of the folder can get rather large.
Anyone have a better way? Should I create directories and store them...?
This system is not using a database but instead its using multiple flat files.
This sounds like a multi-user system. How are you handing concurrent access issues? Your answer to that will greatly influence anything we tell you here.
Since you aren't doing anything special with your other files to handle concurrent access, what I would do is add a new folder under your main data folder specifically for document storage, and write your user files there. Additionally, you need to worry about name collisions. To handle that, I'd name each file there with by appending the date and username to the original file name and taking the md5 or sha1 hash of that string. Then add a file to your other data files to map the hash values to original file names for users.
Given your constraints (and assuming a limited number of total users) I'd also be inclined to go with a "documents" folder -- plus a subfolder for each user. Each file name should include the date to prevent collisions. Over time, you'll have to deal with getting rid of old or outdated files either administratively or with a UI for users. Consider setting a maximum number of files or maximum byte count for each user. You'll also want to handle the files of departed users.