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Size of disk subsystem will be calculated on the basis of frame resolution and compression, rate of video signal frames per second, number nuMBer of cameras recording events to the hard drives and other recording parameters. 

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Size of disk subsystem can be calculated by formula:

Size of Disk subsystem (MbMB) = Time of storing an archive (days) x Cameras numbernuMBer x Rate of recording (fps) x3,51 x Time of guaranteed recording from a camera (h / day) x Average frame size (KbKB),

where Time of storing an archive is the required time of storing an archive from one camera, days;

Cameras numbernuMBer is the number nuMBer of cameras recording to the archive;

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3,51 = (60 sec in min x 60 min in hour)/(1024 kb KB in MbMB) – is the coefficient used for kbKB/s-MbMB/h conversion,

Time of guaranteed recording from a camera is the number nuMBer of hours of guaranteed recording from one camera to the archive per day,

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Info
titleNote

Average frame size for 640х480 resolution is:

Video codec

Average frame size

H.264

from 8 Kb KB to 17 KbKB

MPEG4

from 8 Kb KB to 35 KbKB

MJPEG

from 23 Kb KB to 60 KbKB

Average frame size may vary over a wide range depending on the vendor, model and settings of the camera and video image complexity

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The capacity of the system log database (high detection activity) = D * T * (0.12 GB / day);

where D is the total number nuMBer of detectors created in system,

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Size of object trajectory database = N×T×(0,5Gb 5GB / day)– sufficient disk size;

Size of object trajectory database = N×T×(1Gb 1GB / day)– sufficient disk size plus reserve space;

Size of object trajectory database = N×T×(5Gb 5GB / day)– sufficient disk size plus a large reserve.

N equals the number nuMBer of video cameras in the system actively recording metadata; T equals the period of time (number nuMBer of days) that metadata will be stored. By default, T = 30 days.

If you have less than 5 Gb GB of free disk space, the Object Tracking DB is overwritten - new data records over the oldest data records.