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Note
titleAttention!

The 3.6 Mbps limit is approximate. When calculating, keep in mind that when writing an archive, both write (input) and read (output) operations are performed simultaneously, which are necessary for service purposes.

Camera average bitrateWrite IOPSRead IOPS
Archive recording only
Less than ~3.6 Mbps0.29 × N0.035 × M
More than ~3.6 Mbps0.065 × M0.035 × M
Archive playback only
When viewing, only read operations are performed0.035 × R × S
Simultaneous recording and viewing of the archive
Less than ~3.6 Mbps0.29 × N0.035 × M + 0.035 × R × S
More than ~3.6 Mbps0.065 × M0.035 × M + 0.035 × R × S
Tip

Names of variables

  • N is the number of cameras recording to the archive.
  • M is the total bitrate (Mbps) of all cameras participating in the recording.
  • R is the total bitrate (Mbps) of cameras played back from the archive (at 1x speed).
  • S is the playback speed (for example, 2.0 for fast playback).

Recommendations for disk arrays (RAID)

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