Video surveillance as an important basis
when checking in at the bank, the judiciary, the application of the Safe City
is very broad, and with the development of technology and the needs of the
times, many places are installing high-definition camera. The data in these
areas need to be stored in 1-3 months time or even half a year or more. With the
arrival of high-definition era coming, not only requires a high-definition camera,
which also has high definition picture storage requirements, which is great for
storage technology presents challenges.
HD
monitor storage requirements
According to modern security
monitoring storage requirements can be simply summed up as "high
five":
1.High capacity: HD brings surge storage
capacity, needs a stable and reliable high-capacity storage: improve the
capacity of a single system: extended by cascading multiple SAS JBOD, support
3TB, 4TB hard drives, RAID enhanced robustness; using clustered storage systems
.Enhanced storage system flexibility scalability, reliability alone make up for
deficiencies,
2.High
performance: high-definition monitor the total bandwidth requirements for
high storage and storage performance tuning should be based on monitoring features:
Performance optimization: concurrent high-definition large streams of data
streams in different modes (read-write, edge deletion and writing, RAID
rebuild) the IO performance optimization, NAS performance optimization,
application combines: NVR software embedded in the application processing
capabilities, the rational allocation of system resources;
3.Energy efficiency: mass storage
deployment is behind a lot of energy consumption, high cost, low power
monitoring equipment should be designed: the era of the DVR, monitor
manufacturers through the hard holiday to reduce power consumption and extend
life, and network storage can Use MAID energy savings, but more suitable for a
backup archive MAID environment; taking into account monitoring applications is
7 * 24 uninterrupted, choose a high power conversion efficiency (80Plus power
supply or DC power) more valuable, can not affect the application of cases decreased
energy consumption;
4.High
density: the basic monitoring requirements for storage is to reduce the
cost per TB, the cost per slot: after the popularity of high-definition
monitor, the original 3U16-bay equipment, limited storage capacity of a single,
high-bay storage can support more cameras; 4U24 bit more of a high-density disk
storage, each slot can effectively reduce costs and improve a single storage
capacity, saving rack space;
5.High
Application: Storage must be designed for the monitoring of actual demand,
solving customer pain points in order to survive: excessive file fragmentation
results in performance degradation, vulnerability of the file system after a
power outage, streaming direct writing, efficient indexing structure; improve
NVR embedded applications convenience and compatibility, support for Windows /
Linux software, provides API interfaces with external monitoring subsystem, to
achieve high efficiency analysis, rapid positioning in massive data; to UIT's
SV1000G2 example, from product design on throughout. " 5 high ", the
use of end-to-SAS6Gb technology, Intel's latest SandyBridge platform to improve
performance, 4U24/4U36 high-density design, support 3TB hard drives, to
increase storage capacity in a single system, reducing the cost per slot;
applicable conversion efficiency up 90% 80Plus power supply, you can save more
energy, reduce system operating costs; may be more closely integrated with the
control system through architecture optimization.
NVR
was a mainstream cloud storage solutions
NVR as an integrated network video equipment, which combines video
capture, preview and forwarding, storage, file system management and retrieval,
playback and other functions in one, has been widely used in various types of
network video surveillance system. In high-definition video surveillance,
networking, and even intelligent trend lower, NVR storage solutions considered
first cloud-based storage solutions, the industry has been affirmed.
Video surveillance system architecture will provide cloud clustered
applications, grid computing and distributed file systems and other features of
the device between the networks of different types of storage devices through a
collection of software applications to work together, provide external data
storage and business function access, in this framework, NVR will further
enhance the scope of its application, will play storage node in the cloud
architecture, but also will become the compute nodes to achieve more
intelligent applications.
In this thought cloud storage, video data for each NVR storage on
each other back up, not only the greatest degree of assurance of timely and
efficient concurrent read and write, but also to ensure the security of stored
data and reliable. This efficient and reliable in the future will be to monitor
the industry to subvert the traditional business model, by the operator to
invest in the construction of the monitoring system, and then provide cloud
monitoring service to users, specifically video surveillance cloud services may
have the following three modes:
Platform Hire: NVR by remote operators to deploy to build
cloud-based NVR surveillance management platform, customers only hire operators
monitor cloud service platform and Internet access bandwidth for remote video
surveillance broadband network, to achieve real-time image preview, cloud
mirror control, historical images inquiries and remote device management
functions;
Space rental: operator deployments by offsite NVR, NVR-based
management platform to build customer rented storage space provided by the
carrier, digital image storage capabilities;
Equipment hire: hire operator customers a full equipment, such as
cameras, platforms, storage space.
Meanwhile, also in conjunction with other professional HD NVR IT
storage devices, towards energy saving, low power consumption trends, in
addition to energy-saving design of the device itself, it will also increase
the MAID storage applications, so that the non-writable disk in a non-working
state , to reduce power consumption by optimizing the write mode while
recording, decrease or reduce the hardware configuration of the device in the
system to save energy.
Difficulties
faced by high-definition monitor data storage
Although NVR cloud storage solution, but in reality, the market
demand is changing, DVR, NVR, SDI-DVR and FCSAN, IPSAN other storage solutions
coexist, have their own characteristics, but also difficult to meet all the
needs. On the one hand the pressure from video surveillance data storage
technology on the one hand but also the province has yet to be perfect.
This year, high security monitoring applications have become the
fire can not fire a mainstream technology. In fact, to talk about what can be
achieved HD sensation so high, in addition to be able to give us a higher
level, more breakthrough video display, it "indeed affect the whole body."
Influence, I am afraid to force the market for high-definition monitors have
devoted themselves more energy. Front of the camera from the most basic to the
transmission cable, the network environment, the compression efficiency, to the
rear end of the monitor display, and storage capacity, have become an important
factor in the definition of casting, and in this case, the definition of the
hot concern is not surprising. In these factors mentioned above, the storage
part is undoubtedly one of the areas we let the most talked about in the past
two years. As a final distribution center for information security video
management system, the pressure is also stored with the last two years to
improve the system requirements become difficult to cap. Especially when
encountered in the traditional storage model today when the explosive
development of information, it is the application process, how it looks
bloated.
1,
the traditional large-capacity storage intolerable
In the framework of our traditional monitoring system, basically
using the front-end device with a structural model of the DVR is completed. In
the system, a video surveillance image information stored in distributed DVR,
DVS, or by discrete control terminal for monitoring computer's hard drive.
However, this mode is not to say that coping with a high-definition monitor, I
am afraid that is the face of the current SD-weather surveillance, after a
period of time will be somewhat difficult, not to mention the even more
high-definition comes a huge amount of information called. In addition, the
traditional centralized hard disk management, it will tend to concentrate in
one place all the video data storage drives them, although this management
model may give us data retrieval, or manage to bring some convenience .
However, the security of data on, then I am afraid will face no small crisis.
Due to the current overall capacity of the hard disk protection has not reached
a very high level, so that when once the damaged hard drive or operating system
failure occurs, the management of data probably will face the possible loss.
2,
the shortage of storage space
Previously, security sector in many units to store information for
video surveillance has a clearly defined time, ranging from basic in 1-3 months
time. For some of the more important moments or video data, its storage time
could reach six months. However, when the HD video emergence of more and more
beginning to the rear end of the storage requirements increase in speed there
is a situation, in this case, two to three times the amount of data to achieve
the growth of PC destined to make traditional hard disk management, or local
DVR model brings unexpected pressure. Under such a situation, or to expand the
storage capacity of the system is, or is to reduce storage resolution, but in
this case, the result is the video quality or storage costs as their final
consideration.
3,
the number of disk resources already intractable difficulties
In addition to the security and storage microscopic, when we build
to analyze the overall system, it will also expose the device compatibility and
other factors that reflect the difficult predicament. Due to the large
monitoring systems are often phased construction, equipment used in the
construction process is not consistent, so the final application, this variety
of brands and models of devices to centralized management and monitoring of
great difficulty. Meanwhile, the traditional DVR or DVS equipment, due to the
limited transmission capacity of the network, it is difficult to form a unified
storage, unified monitoring center architecture, enterprise data storage
security monitoring appear to find trouble, scheduling is not timely, video
storage and other issues dispersion produced.
4,
supporting technology will save HD storage
In fact, for high-definition monitor this predicament brought on
storage, even though we have proposed to work together with a variety of
storage devices, or some of the ways to reduce the content of information
stored, such as to relieve the pressure side. But from the source point of
view, it is also required to belong only to solve temporary expedient. If you
want to solve the problem of stress stored can find application in line with
the definition of supporting technology, is still indispensable choice.
5,
the front end can achieve compression technology or "closure"
Today, both the transmission or storage requirements, coding have
become high-definition monitors to ensure a smooth one important way.
From our previous data we can see that if we in the application, the
upgrade from MJPEG encoding format is H.264, then we can end our store directly
eliminating more than 50% of the storage space. Because of this, more and more
end users begin to upgrade the data format from MJPEG, MPEG-4 to H.264, so that
compressed video takes up less space, while maintaining the same with the
MPEG-4 video quality. While H.264 compression capabilities fixed on the screen,
a little lacking in the former, but this does not hinder the user's pursuit for
H.264.
How
cloud storage technology to solve difficult problems storage
Obviously, the difficulty to solve the high-definition storage is
not a camera problem, how to solve the problem, cloud technology is still the
main solution.
1,The network is expected to a solution of the storm HD
In the beginning of this year, H.265 wind once again all eyes will
be drawn to the relationship between the compression and HD. Since H.265 is a
new video coding standard H.264 enacted after. The former is technically around
the existing video coding standard H.264, while retaining the original number
of mature technology, a number of other technologies to be improved. For
example, to improve compression efficiency, improve the robustness and error
recovery capability and reduce the delay in real time, reduction in the channel
access delay and random access, reduced complexity and so has a high
performance. Thus, this treatment for HD is undoubtedly more focused.
2, Cloud technology will provide back-end "clear"
Having the front of the "closure", we come to talk about
changing the storage backend can bring us. This year, the application of cloud
technology has allowed us to more thorough understanding of this technology has
a future. Conceptually, this is a new technology by means of things, it is within
the network storage space to achieve effective integration, according to need,
so that the information stored in the network to find a broader internal
storage space.
Although
the current technology, the use of cloud technology for monitoring system as
well as full coverage of certain difficulties. However, this is not due to
defects caused by cloud technology, but has not yet fully reached the desired
popularity only. Thus, cloud computing for storage pressures ease, has been
regarded as an effective means for the future.
China IP Camera Manufacture -www.sysvideo.cn
