Is compression used when the files are uploaded?
No. There is no compression
If 50GB worth of files are on a filesystem, does that equal 50GB in the Oracle Database?
There is a slight overhead, but it is approximatley the same as long as there are no revision to files. File revisions are kept in the database.
If a file is deleted from document manager, does that delete the blob and the metadata associated to it?
If it is not referenced from elsewhere, yes it is removed
Is there a recommended sizing determination?
Add approx 250KB per record of both index and data tablespace for sizing
For uploading/downloading documents, is there a maximum recommended size for each file to be used in document manager?
Because of different file system implementations, it is recommended file sizes be kept below 2GB
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