How to choose a configuration for a video surveillance system?

Question

CCTV

Hello comrades.
I, a simple system administrator, pressed me, the fate of building a large video surveillance system, I myself did not come across the enterprise closely. Therefore, I ask for your advice.
There will be about 300 cameras, 5-7 Trassir servers, 300Tb of data, incoming data stream of 3-4 Gbps (calculated using a calculator).
Tell me how to build a system (RAID 10 or 50, which storage system is better to choose, NAS or SAN, whether Tier-2 solutions will fit, what storage topology to use), lay down a reservation. At least where you can read on this topic, get acquainted with the accepted practices in building such systems. If you need more data, ask, the budget issue is not acute.

Answer 1

As always, there are several options:
1) A separate NAS / SAN such as Netapp with a bunch of shelves connected via smb / nfs / iscsi (simple implementation, extensible, expensive, vendor-dependent)
2) Each server with its own local storage on disks - a server with 16x4TB of disks in RAID10 array (very simple implementation, non-expandable, non-fault-tolerant, cheap, non-optimal disk consumption)
3) Build the storage itself based on CEPH for example (expandable, fault-tolerant, vendor-independent, free)
There are two options for the third option (CEPH):
1) Separate storage , to which clients connect servers, an analogue of the first option.
Each storage server will have: 16x4TB SATA drives, 64GB RAM, two 10GB ports and/or 40GB infiniband (the same price), any xeon processor.
2) Combined storage, each storage server additionally launches a virtual machine (s) with trassir. We increase the configuration of each server by a more productive processor with 8 cores and add memory for the tracer.
Type: 2x Xeon 2680v2, 96Gb RAM, 16x 4Tb SATA.
In this case, virtual machines can migrate back and forth from server to server absolutely painlessly, add an additional pacemaker and there will be a full HA with an uptime of five nines!
Our CEPH now holds 118 terabytes, the flight is normal. Clients and virtual machines (KVM) and NFS/SMB.

Answer 2

destiny to build a big video surveillance system

Are you going to build and maintain it yourself, or is it a contractor?
If the contractor - sent requests. Let them offer, tell, prove that their solutions are optimal. Yes, even if he himself - all the same. Any company would like to receive such an order.
We have a smaller system - 32 cameras, 2 registrars - the security with the installers decided everything directly, I just made sure that there was no obvious hack work. And now video surveillance is in the service of a third-party organization - which installed it.

Answer 3

The dahua website has an interesting solution for nvr6000 network video recorders, cluster systems with all the consequences.