CCTV | IP Network Video | Technical Brief | iSCSI
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Who else uses iSCSI?
Nobody has managed to make their IP cameras or encoder
speak directly to iSCSI RAIDs, neither as Network-Attached
Storage nor as Direct Attached Storage. Firstly their
hardware does not support dual NICs and so DAS is
impossible, and secondly their IP cameras and encoders
were not designed with iSCSI in mind, and it is very hard to
implement retrospectively.
iSCSI is a very recent alternative for implementing Storage
Area Networks (SANs), previously Fibre Channel (FC) was
used, and still is, but although it has some benefits for very
high end applications it is much more expensive and
complex to configure as well as challenging to access
remote devices.
Other CCTV manufacturers who use conventional NVRs are
able to use SANs for their storage, which might include the
use of iSCSI RAIDs as subsystems. However, this is not
direct and so includes the costs, reliability and
maintainability issues of such First Generation Video over
IP architectures.
Because iSCSI uses TCP/IP, the omnipresent protocol that
drives networking as we know it, researchers have
overcome various challenges including the risk that packets
will arrive in the wrong order and latency. One
disadvantage with massive-scale iSCSI is CPU utilization on
the Application server that is talking to it, however in the
case of CCTV this is nothing more than a camera or a small
encoder and so the scalability performance issue does not
arise.
Global players including Network Appliances, EMC, HP,
IBM, Hitachi, Microsoft and Dell fully support iSCSI.
Notably Sun has recently done a 180 degree U-Turn
compared to its position in 2002 and has now embraced
iSCSI, yielding to market pressures.
Are there different kinds of iSCSI?
Although iSCSI is a standard it has been implemented
differently by different iSCSI RAID manufacturers.
iSCSI initiators, usually a small number of very large
application servers, are Microsoft Windows or Linux-based
and they talk to an iSCSI SAN. In Bosch’s case however the
VIP X platform, the foundation of the IP cameras and VIP X
family of encoders, is neither of these, neither is it
proprietary. Bosch based its iSCSI stack on the publicly
available open standard for iSCSI.
The high ratio of initiators to targets is a significant
deviation from the original intention of iSCSI, and is what
makes Bosch so unique. This also means that iSCSI RAID
manufacturers are rapidly adapting their firmware on their
appliances to reflect this brand new emerging market.
Without this change, many manufacturers will only support
only a few cameras per RAID – down to 4 cameras (8
simultaneous iSCSI connections) with one particular global
manufacturer.
Compatibility Guide
Only the Bosch iSCSI RAIDs are supported. Compatibility
with iSCSI RAIDs from other vendors is not guaranteed as
Bosch has identified a variation in performance and feature
sets across multiple suppliers.
(All units shown support Bosch iSCSI storage)
Model Description
NWC-0455
Dinion IP
Camera
The NWC-0455 Dinion IP is
a 1/3-inch CCD digital color
network camera
NWC-0495
Dinion IP
Camera
The NWC-0495 DinionXF
is a high-performance,
1/3-inch CCD Day/Night
network camera
VIP X1
Encoder,
plus the
audio and
PoE
variations
VIP X1A,
VIP X1P, VIP
X1AP
High Performance Single
Channel MPEG-4 Encoder
VIP X2,
VIP X2A,
Encoders
High Performance Dual
Channel MPEG-4 Encoder
Modular, high-performance
CCTV camera video encoder.
Each VIP X1600 is a 4x4 unit
that accommodates up to
four hot-swappable
modules – each with four
analog audio/video inputs.
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