This problem has been discussed with the users and the conclusion was to store in-house research data for 100 days, and data of proposal experiments only for 30 days. A solution had to be found to meet the new requirements of storing and accessing beamline data. Due to the large number of files, it is mandatory that the framework of the disk space organization is well defined and implemented. All staff accounts must belong to the same group. Due to this separation, in-house research data can be kept for 100 days, and proposal data for 30 days.
Group permissions are therefore important to allow or deny write access to the data space.
The generic operator accounts on the storage server will be closed. The re-organization of the data space and how to transfer data is explained in more details in Appendix 2. The modification in disk space manage must be introduced step by step. The proposal accounts and therefore all data residing in that directory are deleted 30 days after the visitors' departure. On that day all data directories will not be available to the users.