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Edge Recording, Servers, and

Storage Management Connecting Physical Security IP Networks

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> What are the requirements for acceptable

video quality?

> How long does the material need to be

archived?

> Does the organization already have a standard

storage solution/vendor?

> What are the consequences if stored video is

lost? Need for redundancy?

> Choice of Video Management System - How

does the VMS work?

> What is the project budget?

Storage design prerequisites

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> Two different definitions of gigabyte in general use:

> 1,000,000,000 bytes or 109 bytes

– decimal definition,

– used in telecommunications (network speeds)

– Used by computer storage manufacturers

> 1,073,741,824 bytes, 10243, or 230 bytes

– Used for computer memory and file sizes.

– Microsoft uses this definition to display hard drive

sizes, as do most other operating systems and

programs by default

– By this definition, there are 1,0243, or

1024×1024×1024 bytes in a gigabyte equivalent to

1,024 megabytes

Storage measurement – why a GB isn’t always a GB!

Source: http://en.wikipedia.org/wiki/Gigabyte

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Edge storage, controlled by the camera/encoder will

be an important complement to VMS solutions and

provide new possibilities for efficient surveillance

> Recording redundancy

> HQ video in low bandwidth environment

> Remote site storage

Edge storage

VMS Central

storage

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> SD cards can continue recording and replace lost video if network problems arise.

Edge Storage and Failover Recording

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High-quality video in low bandwidth environments

Low bandwidth/Quality

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Remote site storage

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> There are three standards for storage capacity:

– SD up to 2 GB

– SDHC up to 32 GB

– SDXC up to 2 TB

> Axis supports SD/SDHC/SDXC memory cards with

ext4 file system, with support for up to 32 GB

storage in SDHC

> 64 GB SDXC cards can be used in

products with firmware 5.40 or higher.

Local Storage

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> The Speed Class of the memory card designates minimum writing performance to

record video

> SD, SDHC and SDXC cards support Normal Speed, denoted Class 2, Class 4,

Class 6, and High Speed, denoted Class 10

> A higher class = higher data transfer and data write speed. The host (camera)

determines the speed up to the maximum supported

by the flash memory

Local Storage

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How much can be stored on a 32 GB SD card?

5-8 days 3-5 days ½ -1 days

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How much can be stored on a 32 GB SD card?

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What is the expected lifetime of a 32 GB card?

14+ years 6+ years 2+ years

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New in FW 5.50

Internal

workspace

Internal WS

FW 5.40 FW 5.50

~20 GB used

for video

storage

~30 GB used

for video

storage

32 GB SD

Card

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> Redundancy during network disruptions or system maintenance

> Axis network cameras and video encoders

> SD/SDHC media: Axis firmware supports up to 32GB (Class 10)

> Use in low bandwidth environments

> Remote installations

> Mobile surveillance

Edge Storage Benefits

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Direct Attached Storage

Workstation

Network cameras

Switch

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Network Attached Storage - NAS

> Easy installation and administration

> Access via IP network

> Not recomended for “Live“ or “Buffer“ storage

Network cameras

Network Attached

Storage

Network

Switch

Workstation

with video

management

software

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Storage Area Network -SAN

> FC or IP based

> High speed network between servers and storage media

> High investment costs

> Ultra fast data access

> High capacity

> Redundancy

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> Redundant Array of Independent (or Inexpensive) Disks

> Multiple independent hard disks

are connected

> Key concepts

– Mirroring: data copied to more than one disk

– Striping: data split across more than one disk

– Parity: checksum used to rebuild replacement drive(s)

> Resources at:

– http://www.ecs.umass.edu/ece/koren/architecture/Raid/basicRAID.html

RAID

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… … A7 A5 A3

> RAID 0 (striping)

– Data distributed over several disks

– No redundancy!

– High performance

> RAID 1 (mirroring)

– Identical data on 2 disks

– Redundancy

– Lower capacity

RAID levels

A1

A8 A6 A4 A2

RAID 0

… … A4 A3 A2 A1

A4 A3 A2 A1

RAID 1

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RAID 5 > Stripes data and parity across drives

> Minimum number of drives required: 3

> One hot swappable drive

> Cope with 1 drive failure

… … P4 A9 A5 A1

A10 P3 A6 A2

RAID 5

… … A11 A7 P2 A3

A12 A8 A4 P1

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RAID 6

> Stripes data and parity across all drives

> Minimum number of drives required: 4

> 2 Hot swappable drives

> Cope with 2 disk failure

… … P4 A9 A5 A1

A10 P3 A6 A2

RAID 6

… … A11 A7 P2 A3

A12 A8 A4 P1

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RAID-10 > a combination of RAID 1 (mirroring) and RAID 0 (striping)

> Minimum number of drives required: 4

> better fault tolerance and rebuild performance

> Change failed disks without performance loss

… … A7 A5 A3 A1

A8 A6 A4 A2

RAID 10

… … A7 A5 A3 A1

A8 A6 A4 A2

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Summary

> Storage makes a real business impact as it can account for up to 30% of the

system cost!

> A GB is not always a GB!

> Knowing how the Video Management System works is essential!

> Storage media comes in many shapes, forms and prices

> Always make the end-user evaluate how mission critical the video stream is – the

more critical – the more redundancy and more complex storage

> Learn and make use of the AXIS Design Tool in your storage estimates

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Thank you!

network video

innovation

glo

ba

l

HD

TV

part

ner

netw

ork

leader

camera

protect

outdoor

image usability

leader

safe

therm

al

easy installation

inte

lligent

open

integration ease of use

competence

megapixel

environment

worldwide

H.264

focus

Axis

video encoder

co

nve

rge

nce

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