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Version 4.1.0.5 bêta (netcore) Burst of packet loss in recordings

DVR netcore

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#41 solabc16 OFFLINE  

solabc16

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Posted 12 March 2019 - 05:58 AM

Hello @rouq

 

Thanks for the update, it could be the case that 8 streams all needing some level of transcoding is going to be a stretch too far.

 

We'll certainly continue to look at it and improve the performance wherever possible, thanks again for your time and feedback.

 

Best

- James



#42 rouq OFFLINE  

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Posted 24 March 2019 - 10:54 AM

Hello @solabc16

 

I received my intel nuc i5 coffee lake and installed ubuntu server on it.  At first, I was experiencing the same packet loss (in a lesser degree).  But I was able to fix this by tweaking the the linux network stack.  I basically increased the network buffers size in /etc/sysctl.conf :

 

'net.core.wmem_max=12582912'
'net.core.rmem_max=12582912'
'net.ipv4.tcp_rmem= 10240 87380 12582912'
'net.ipv4.tcp_wmem= 10240 87380 12582912'
'net.ipv4.tcp_window_scaling = 1'
'net.ipv4.tcp_timestamps = 1'
'net.ipv4.tcp_sack = 1'
'net.ipv4.tcp_no_metrics_save = 1'
'net.core.netdev_max_backlog = 5000'

 

With those settings, I tried recording 6 streams with 2 transcoded playback sessions and no corruption occurred. 

 

I applied those settings on my ds418play just to see if that would fix this issue as well.  Unfortunately, it did not. 

 

I just wanted to let you know that. Maybe it could give you some clues about what is going on.

 

Regards


Edited by rouq, 24 March 2019 - 10:55 AM.


#43 solabc16 OFFLINE  

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Posted 26 March 2019 - 10:22 AM

Hello @rouq

 

Thanks for sharing that information, it's useful to know as we continue looking into this issue.

 

Best

- James







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