The goal of this test was to observe how Tiger Surveillance behaves during a disaster recovery scenario. This is important as in the case of a failed primary storage Milestone will rebuild the Live database on the recorder. This can take time.
There are two distinct DR scenarios for testing Surveillance Bridge :
- Storage DR
- Server DR
This paper focuses on storage recovery, to learn more about DR scenarios see Tiger Technology Resources.
Storage DR
Results
For this test we loaded the Live DB disk (on vSAN) with 8 hours of camera data. Tiger Surveillance offers the option to restore Metadata, which are links to files on the archive. Tiger Surveillance also offers the option to rebuild the full disk with all videos from the archive. The times for each scenario are as follows:
| Storage Recovery Option | Duration | Volume of Data |
| Meta data | 30 Seconds | 1.2 TB ~ 8 hrs |
| Full data | 1Hr 7 Mins | 1.2 TB ~ 8 hrs |
Findings
- Meta data recovery
-
- Fastest recovery method for local Live DB enabling near immediate recordings to recommence while offering video playback.
- Videos will be retrieved and added to Live DB as they are accessed.
- A wizard assisted users with the data recovery DR process.
Figure 6. Disaster Recovery Wizard 
- Full data recovery
-
- This was a full restore of 8 hours worth of data from the Archive to the local Recorder. It took 67 minutes to restore 8 hours of data.
- Would be a good fit for cases where lots of data is being accessed from the local Live DB as this avoids read time latency.
- Can be completed at any time once the local drive and Local Live DB are back on line. Local playbacks are not available until video files are re-imported into the Local Live DB.
Figure 7. Local playback example 