Design enough Storage for IP-CCTV system

[koko1166 0]

Dear great forum and Expert designers, I'm seeking your kind support to provide me with storage calculations for the attached system. I made the attached table based on client requirments.

I tried used Axis web-tool and Jvsg tools but there there is no option for video analytics calculations. Kindly check the attached table and advise me based on u experince how much stoarge [list=]I need to run this IP-CCTV system.

CCTV forum Storage cacl.zip

[koko1166 0]

CCTV forum experts,

 

Please give me an answer ASAP, I really need it by today and thats why I post my topic in this great froum.

 

 

Thanks for u cooperations

[Soundy 1]

The thing you need to realize about these tools is that they can give only VERY ROUGH estimates based on VERY BROAD assumptions. They can't predict how much movement a camera will really see, they can't predict how "compressable" scenes will be, and they can't account for how well you do or don't configure motion detection and analytics. Depending on the codec used, it can't account for variations in different manufacturers' implementations either.

 

Looking at your chart, for example, even with constant recording, the actual amount of compression will be a lot less on the PTZs if they're running constant tours... the same with cameras that are looking at constant motion vs. scenes with less movement.

 

As far as the analytics data itself, it should be only a small fraction of what the video data takes, and shouldn't significantly affect your calculations.

 

Best bet is to over-spec by a fair amount - it's better if the client sees they're getting more days than spec, than less.

[koko1166 0]

Thanks Soundy

 

But based on u experince, is 100 Tera-Bytes is enough for this system?

 

Is there an available tool that can give me a maximum estimate to be on the safe side?

[Soundy 1]

I think the best way to estimate this, would be to find someone with a similar system on a smaller scale, and extrapolate from there. Like, if someone has three fixed and two PTZ cameras using all the settings you're after... then you look at the space they're using, and if you're doing, say, 30 fixed and 20 PTZs, you can multiply their usage by 10 and get an approximation of what you'll need.

 

Case in point: first store we did for a new (at the time) client had analog and five 1.3MP cameras. They wanted 90 days' retention, and were happy running an average of 4fps on all cameras (three or four of the analogs are CIF, the rest are all 4CIF). We started with 3TB internal storage in the DVR, and found we were getting about 28-29 days... so we calculated from that, that we'd need around 10TB total. We added a 6.5TB RAID array (8x1TB, RAID5), fine-tuned some of the camera settings, and now they get almost exactly 90 days (varies between 90 and 92 depending on activity and such... sunny days and summer months with longer daylight tend to create more contrasty scenes and thus need more storage... little things like that). We've used those figures subsequently as a basis for calculating the storage needs on subsequent sites that we've done upgrades and new installs.

 

One advantage you have here is that you're not dealing with any megapixel cameras, so it will be a lot easier to find existing systems to get estimates from. Unfortunately my numbers won't help much, particularly since we're running far lower framerates, and not using H.264 (the Vigil DVRs record in MJPEG; 3xLogic actually claims their AZTECH codec can recompress that better than H.264 in many cases).

[koko1166 0]

Thanks Soundy for your usual quik and detail reply. " title="Applause" />

[Stanislav 0]

See also CCTVCAD Calculator. This calculator uses adjustable patterns based on result of practical measuring traffic for different equipment, compressions, scenes, frame rates, numbers of pixels etc. Thus using it you can systematize practical experience and achieve maximal possible accuracy.

 

In addition the CCTVCAD calculator takes into account up to 3 parallel video streams of each camera (Viewing, Recording, Alarm recording) with different setting. It can import camera data from VideoCAD, can export and print and has many other advanced features.

 

http://www.cctvcad.com/CCTVCAD_Calculator.html

 

Edited March 23, 2011 by Guest

[Integratek 0]

system with 200 cameras @ 25 fps @ D1 ....

 

Somewhat similar system with 16 cameras @ 100 fps stores about a week on 500 gb HDD

 

@ 25 fps that would take 2 TB

One month would take 8 tb

200 cameras would take just below 100 TB