ಅಂಕಣಗಳುಪ್ರಮುಖ ಸುದ್ದಿವಾರ್ತೆ

CCTV –Control system and storage

 
 Mirror: G K Bhat
Anything in system, let it be mechanical, electronic, biological etc. has to be controlled by a controlling system, like human body is controlled by the brain, and the CCTV system is also controlled by a central control system. The control system should have a main processing unit. It may be either a DVR/NVR or a Server. The DVR/NVR/Server loaded with a video management software. For further sophistication and additional facility video management software also used at many places. The control system controls the function of entire CCTV system. In some cases the storage devices are part of the control system housed within it and in some cases external storages are used.
 
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The storage and control devices are selected according to the requirement of the usage of the system. Therefore there is no hard and fast rule. Generally if the cameras used are combination of PTZ and fixed cameras, the storage requirement can be calculated approximately about 500 GB to store the data for a period of one month. The PTZ cameras being continuously moving, the storage capacity needs more, whereas the fixed cameras with motion detector sensors needs less space since the cameras will transmit the data only when there is some movement detected through camera. The storage device will loaded according to the resolution of the cameras. Therefore for viewing we can use full resolution of the cameras and for storage we can configure the resolution to lower level by reducing the frames per second. Preferably 12-15 FPS gives clear pictures.
 
 
When we are selecting the storagedevice , it is better to choose external storage devices like external array or NASH boxes. It helps to avoid loss of data during crash of server or NVR. The server when selected  for CCTV purpose following configuration is recommended.
 
 

Form  factorPreferably Rack Mountable
Processors Intel® Xeon®  processor E5-2400 or E5-2400 v2 product family
Processor sockets 2/multiple
Internal interconnect Intel QuickPath Interconnect (QPI) link: 6.4GT/s, 7.2GT/s,  8.0GT/s
Cache2.5MB per core; core options: 4, 6, 8, 10
ChipsetIntel C602 or better
MemoryUp to 384GB  (12 DIMM slots): 2GB/4GB/8GB/16GB/32GB DDR3 up to 1600MT/s
I/O slots6 PCIe slots:
•   2 x16 with x16 bandwidth, 3.0, full-length, full-height
•   1 x8 with x4 bandwidth, 3.0, half-length, full-height
•   1 x8 with x4 bandwidth, 2.0, half-length, full-height
•   1 x8 with x4 bandwidth, 3.0, full-length, full-height
•   1 x8 with x1 bandwidth, 2.0, full-length, full-height
RAID controllerInternal controllers: PERC S110 (SW RAID), PERC H310, PERC H710, PERC H710P
Internal HBAs (non-RAID): Internal tape adapter
External HBAs (RAID): PERC H810
External HBAs (non-RAID): 6Gbps SAS HBA
 
Drive bays  Choose from  four 3.5” cabled, eight  3.5” hot-plug, or sixteen 2.5” hot-plug drive bays
Hard  drivesHot-plug hard drive  options:
2.5” SATA, near line SAS, SAS (15K, 10K), SAS SSD, SATA SSD
3.5” SATA, near line SAS, SAS (15K)
Cabled hard drive  options:
3.5” SATA, near line SAS, SAS (15K)
Embedded NICBroadcom® 5720  GbE dual-port 1Gb LOM
I/O adapter options1Gb/10Gb Ethernet:
Broadcom 5720  dual-port 1Gb NIC Broadcom 5719 quad-port 1Gb NIC
Intel I350 dual-port 1Gb stand-up adapter
Intel I350 quad-port 1Gb stand-up adapter
Intel X520 dual-port 10Gb DA/SFP+ server  adapter
Intel X540 dual-port 10Gb Base-T adapter
10Gb  Converged Ethernet:
Brocade® BR1020 dual-port 10Gb CNA QLogic®  QLE8262  dual-port 10Gb DA/SFP+ Broadcom 57810S  dual-port 10Gb Base-T CNA Broadcom 57810S  dual-port 10Gb DA/SFP+ CAN
 
FC8/FC4 HBA:
QLogic  QLE2460 4Gb single-port FC HBA QLogic  QLE2462  4Gb dual-port FC HBA QLogic QLE2560 8Gb single-port FC HBA QLogic  QLE2562  8Gb dual-port FC HBA Emulex® LPe-12000-E 8Gb single-port FC HBA Emulex  LPe-12002-E 8Gb dual-port FC HBA Brocade 815 8Gb single-port FC HBA
Brocade 825 8Gb dual-port FC HBA
Power supplyPlatinum efficiency, hot-plug, redundant 495W, 750W, 1100W power supplies; Silver efficiency, cabled 550W power
Supply
Operating systemsMicrosoft Windows Server® 2012 R2 (includes Hyper-V®) Microsoft Windows Server 2012
Microsoft Windows Server 2008 R2 SP1, x64 (includes
Hyper-V)

 
 
 
When we carry out the recording of the data, it is better to use raid-5. In computer storage the standard RAID levels comprise a basic set of RAID (redundant array of independent disks) configurations that employ the techniques of striping, mirroring, or parity to create large reliable data stores from multiple general-purpose computer hard disk drives (HDDs). The most common types are RAID 0 (striping), RAID 1 and its variants (mirroring), RAID 5 (distributed parity), and RAID 6 (dual parity). RAID levels and their associated data formats are standardized by the Storage Networking Industry Association (SNIA) in the Common RAID Disk Drive Format (DDF) standard.
Above specifications are just a suggested one and not a mandatory requirement. We will discuss the required software and other details in our next week topic.
G K Bhat
[email protected]

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