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Cargo reduces the amount of disk space used on a source server by identifying files on the source that have not been accessed recently and converting those files to links to the repository server. The conversion process deletes the contents of the file from the source server, creates a reparse point to the full contents of the file on the repository server, and marks the file as sparse. In simpler terms, the source file becomes an empty pointer to the full contents of the file located on the repository server. When an archived file on the source is accessed, the full contents are recalled seamlessly from the repository server with no interruption to the requesting user or application.
Double-Take RecoverNow can archive files based on the age of files, allowing you to keep newer files fully on the source. You can exclude files from archiving based on size, which is useful for excluding small files where the archiving benefit would be minimal.
When a file has been archived, the link file is still accessible on the source. The link file has an offline file attribute associated with it. When an end-user attempts to access the link file, the contents of the file are recalled from the repository server back to the source. The file opens to the end-user as if it had always been fully on the source.
To help you plan archiving and fine-tune your archive settings, you can generate a preview report. The archiving preview report does not actually archive any data but reports how much data would be archived based on the settings you select.