Planning and tiered storage strategy for video storage days

How to determine the number of days

The number of storage days is usually determined by three aspects:

• Industry compliance requirements: Industries such as finance, education, and hazardous chemicals have clear minimum storage periods (commonly 30 to 90 days).
• Business needs: Dispute evidence collection often requires replaying the situation weeks or even months ago.
• Budget constraint: The number of days is proportional to the storage cost and needs to be balanced.

Layering suggestions

Methods to reduce storage costs

1. Hiered code rate: high code rate for key channels and low code rate for ordinary channels, rather than uniformity for the whole site.
2. Motion detection recording: Only record non-key areas when there is movement, which can save more than 50% of space. However, please pay attention to the risk of missing records, and it is not recommended for important areas.
3. Reduce frame rate: Static area is reduced from 25fps to 12~15fps.
4. Enable smart encoding: H.265+ saves about 50% compared to H.264.
5. Demarcate effective areas: Only record the effective parts of the picture, and block information-free areas such as the sky and greenery.

Capacity Management

• Set the capacity alarm threshold (such as an alarm when 15% is left) to avoid discovering it when it is full.
• Regularly check the video integrity report to confirm that no time periods are missing.
• Important events are exported and archived in a timely manner instead of occupying online storage for a long time.
• Establish an expansion plan: reserve disk space or support external storage expansion.
• Evaluate once a year: increasing points and upgrading resolution will quickly consume capacity.