Bosch Video Streaming Gateway (VSG) is a separate “Sub-Service” of VRM that can run independently, or in conjuction with VRM. VSG acts as an iSCSI NVR for non iSCSI capable devices.
VSG is specifically designed to provide integration for 3rd party ONVIF, JPEG, RTSP, and legacy H.263 Bosch devices.
The base functional capabilities of VSG are as follows:
VSG throughput and performance is determined by several factors:
When designing a system, all of these factors must be considered in order to build a cleanly-functioning system.
Understanding Basic Throughput:
1. When using a standalone server, the VSG throughput will vary based on the hardware platform itself:
o This includes both the RTSP pull from cameras, as well as the iSCSI push to the storage target
The new Generation 10 Server can supply 3000 Mb/s of throughput:
2. The second part of the equation is the available throughput of the iSCSI target.
NetApp 2800 single Controller with no expansion shelves = 650 MB/s
In a VSG standalone sever scenario with a camera that is streaming at 3Mb/s:
Bandwidth calculation for a single camera would be 9 Mb/s.
A 100 camera system would be calculated at a theoretical worst case scenario 900 Mb/s:
VSG and Recording Appliances:
VSG and Recording appliances are a unique situation:
Based on RAID 5 configuration:
⚠️ When utilizing a Recording Appliance with VSG, throughput will be slightly lower. The VRM numbers are based on individual cameras performing and iSCSI "Push". VSG is performing a "Pull" to bring the video into the system.
Nice to know:
BVMS system design guide includes also a relevant VSG section.