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Storing large files (AutoCard) in SharePoint

  Asked By: Zane    Date: Dec 26    Category: Sharepoint    Views: 1785

There is not really a hard limit to upload file size. Although there is
a setting to limit upload file size for each Virtual Server in Central
Administration, it is only enforced when uploading a single file. When
multiple files are uploaded in the browser, or when files are copied in
using the Explorer listview, or copied in using My Network Places in
Windows Explorer, etc. the size limit is not enforced.

That said, there are multiple reasons for some guideline to be
established. If nothing else, HTTP is not an efficient file transfer
method. There are other technical considerations like BGP routing,
Internet congestion, bandwidth, timeout settings, database connections,

The hurdle that WSS SP1 addressed was more of a Web server memory
management problem. As I understand it, before WSS SP1 the entire file
being uploaded was copied into memory and then subsequently saved to the
database. After WSS SP1 the file is uploaded into a fixed (I think 400K)
memory slot a chunk at a time, when the memory slot is full it is
appended to a temporary file on the file system, when the full file is
uploaded it is subsequently saved to the database. This approach allows
for file uploads of much larger size to be uploaded simultaneously
because the memory footprint for each upload is finite and consumes
potentially far less server memory.



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