WholesaleBackup clients use a local cache to perform operations. This note provides information on cache utilization and management in both our new client as well as our original client.
The WholesaleBackup backup client uses a folder as a temporary working space while operations are running and it releases this space when operations complete.
This folder is used as scratch space when a backup or restore is running. For example, during a backup of a file, the client needs a location to encrypt, compress, and deduplicate the file. If the file is a Microsoft Exchange EDB file, then it will be placed temporarily in that folder so eseutil can be run on it to verify it. Generally speaking, the backup client needs about 1.5 times as much free disk space available to it to process a file for backup; for the restore process, you need about 2 times as much free disk space as the largest file being restored.
This screen capture shows where the folder is specified under the Backup > Settings tab.
This screen capture show to specify the minimum free disk space which the client will preserve on any volume that the client is writing data, this is accessed opening the client in -expert mode.
Please note that this folder is also used to download backup history when you are doing a restore from computer's other than the local one you are backing up from, and that data is preserved between client operations, so in fact it's not temporary, but it is usually pretty small.