You are correct in the fact that these files are generated by recalls. I think there are only two ways around this that I can think of:-
1. Create a batch file to delete ev*.tmp files and have this run on the task scheduler
2. Within the admin service there is some code to delete temp files on the EV server which runs every hour and by default deletes files that are older than 24 hours by using the LastAccessedDate. Essentially what this does is find the temp folder and then deletes files that fall under 1 of the following conditions:-
EV$*.*
~DF*.TMP
So in your case the first condition would suffice but normally on a file server there is no admin service installed. I have not tested this but I am thinking if you do not want to do option one you could install the EV binaries and have the admin service started only so that this code runs. You can also change the default of 24 hours to any value you like by using the following registry key:-
HKLM\SOFTWARE\KVS\Enterprise Vault\AdminService\DelFilesOlderThanHours
Essentially though for ease I would just go for option 1 as this will stop you having to install unnecessary EV binaries.
