What is the Glutton MODE in VRM, what are the causes and how does it work?

Question:

What is the Glutton MODE in VRM, what are the causes and how does it work?

Answer:

Enhanced glutton protection mode is a new feature in VRM versions e.g. VRM 3.71 and newer. 

The prevention of a glutton (German: Vielfraß) defines and prevents a camera or multi-channel encoder from mounting and consuming  a large number of  blocks in a very short time.

If a device is placed in glutton mode, VRM performs the following operations:

• All blocks except the actual mounted and recording block are removed from the camera span list.
• If a device is in glutton mode, it gets only 6* number of configured cameras blocks per hour.
• The device is monitored and when block consumption returns to normal, it is removed from Glutton Mode.

Possible messages when a camera is in Glutton mode are as follows:

• This device has an abnormal high storage consumption. To protect other recordings, storage allocation is reduced. This may result in recording gaps for this device.
• Device runs out of storage and might stop recording.
• This device had an abnormal high storage consumption and is now set back to regular mode.

Glutton Mode possible causes:

• BVMS Profiles: Normal-Good-Excellent used on any Current CPP.
  • Corrupts the Camera Configuration, VRM will place camera into Limited span mode (6 spans per hour max).
• Bad Time Server: If Time Server jumps more than 2 seconds (Forward or Backwards) frequently.
  • Causes Camera to prematurely release blocks and take new ones.
• Network Issues: Wireless, bad cables, bad switch ports, port 3260 blockage issues, network disconnections, etc.

Glutton prevention feature explained:

• Every time a block is mounted by a device, the block and the time of mount operation is saved.

  • The last 15 time differences between mount operations are considered for glutton protection
  • If more than the half time differences between mount operations are less than a threshold of 120 seconds, Glutton protection mode is switched on