The following items describe the
policies for the EZ-Snapshot service offered here at Rensselaer Polytechnic
Institute:
1) Scheduled snapshots occur every other day between the hours of 10:00 pm and 3:00 am.
Snapshots
are scheduled for every day of the week, with each computer having a Snapshot
schedule of Mon/Wed/Fri/Sun/Tue/Thur/Sat. However, not all participants
in the EZ-Snapshot service get backed up on the same date.
2) Files get backed
up incrementally
The
system backs up only those files which have changed since the most recent
version of the file was stored.
3) The system stores
up to two copies of a file.
As
a file changes, the system retains two versions of it. The system will
retain the older version of the file for 30 days; after a file remains
static for that length of time, the EZ-Snapshot system removes the older
version, and stores only one version of the file in the system.
4) The system retains
files deleted from the host disk for 60 days.
If
a user deletes a file from his or her PC or Macintosh, the EZ-Snapshot
version of the file will remain available for 60 days. After 60 days, however,
the deleted file can NOT be restored. Files
that remain on the host PC/Macintosh, remain in the EZ-Snapshot system.
5) The EZ-Snapshot
system will not store any files that get modified during the snapshot process.
To
ensure the integrity of the files stored in the EZ-Snapshot system, the
system will not store any file(s) being modified during the EZ-Snapshot
process. However, each PC/Macintosh system can control the number of times
that a file copy gets retried, when this situation occurs.
Users can set the CHANGINGRETRIES parameter in the dsm.opt file on their PC/Macintosh system to control the number of retries.