Files Uploaded from UI where do they reside.... in Heap or in RAM Memory

harshav420 over 5 years ago

Hi All,

I wanted to check few things like,

I have a file Upload component where i can upload the file.... Once the file is Uploaded into the screen, where does this actually reside as per the memory,

1.When i click on Upload it takes time to load on to the screen to tell me the size--- till that time where is the file loaded.

2.Once the file is uploaded on screen where is the file loaded-is it in Heap or Memory.

3. Once you click on submit where does it goes.- is it Heap or Is it Memory or is it Disk

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0 Eliot Gerson
Appian Employee
over 5 years ago

It would be helpful to have some additional context for your question. If you tell us the problem you're having, we might be able to help you find a solution.
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0 harshav420 over 5 years ago in reply to Eliot Gerson

Ok here is my context....

There are certain scenarios where the users can upload, a file using file upload component and file size may be >10 GB also,...

In such scenarios we are planning to restrict the user that you cannot upload. But Appian will tell me that the file which is uploaded, only when it uploads complete 10 GB into the UI. So when uploading it where it goes....
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0 Sathya Srinivasan
Appian Employee
over 5 years ago in reply to harshav420

You can do a few things. But to answer your first question, files that are uploaded are held in disk. However, a pointer to the location is held in Appian content engine. When uploading, it still goes to the file system and is held in a temporary state till the form is submitted. if the form is NOT submitted, the temporary file is automatically deleted after a period of time. Hope this helps.
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0 harshav420 over 5 years ago in reply to Sathya Srinivasan

Thanks Sathya,

we are having a question like, we have an application where users(say 50 concurrent) are working and uploads the 10 GB files, does it effect the Heap size or RAM Memory Only for this operation. The reason for asking this question is we only have very limited Heap size, we are worried for these operations will it effect the Performance of the environment or not.
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0 Eliot Gerson
Appian Employee
over 5 years ago in reply to harshav420

In that case, it's worth noting that the maximum file upload size is generally 1GB. On some sites, this can be configured up to a maximum of 2GB, but Appian does not currently support the upload of individual files larger than 2GB. Now, having said that, 2GB is quite large for a single file; may I ask what sort of files you're planning to upload that would be in excess of 10GB?
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0 Eliot Gerson
Appian Employee
over 5 years ago in reply to harshav420

In that case, it's worth noting that the maximum file upload size is generally 1GB. On some sites, this can be configured up to a maximum of 2GB, but Appian does not currently support the upload of individual files larger than 2GB. Now, having said that, 2GB is quite large for a single file; may I ask what sort of files you're planning to upload that would be in excess of 10GB?
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0 harshav420 over 5 years ago in reply to Eliot Gerson

There is no control on the File Eliot, as it is done by Customers not by the Organization Users, so we cannot control it they might upload a video file also .
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