| Network DVR questions Why don't they enable data deduplication on the storage array in the datacenter? That way if someone records a show like CSI for example, and if you also record it... it's only using up space for 1 HD episode, rather than wastefully recording multiple copies, wasting space and disk utilization. That way you'll likely never reach your limit on the 160GB storage pool, unless you record a lot of stuff others don't.
Also how is the response time with trick play controls? Are they transmitting these controls over DOCSIS (much faster than traditional low bandwidth OOB data channels).
If the stuff is streamed, why not stream a nicer DVR menu fit for 2011... not that same 12 year old UI. Where's the innovation? ActiveVideo Networks has some rich streaming UI products, as does Seachange. |
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 LinklistPremium
join:2002-03-03
Longport, NJ
kudos:5 | said by cypherstream:Why don't they enable data deduplication on the storage array in the datacenter? That way if someone records a show like CSI for example, and if you also record it... it's only using up space for 1 HD episode, rather than wastefully recording multiple copies, wasting space and disk utilization. That way you'll likely never reach your limit on the 160GB storage pool, unless you record a lot of stuff others don't.
They didn't do what you suggest because they lost a court case to Hollyweird when they tried something similar. So they came up with their current scheme to satisfy the lawyers. |
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| reply to cypherstream
said by cypherstream:Also how is the response time with trick play controls? Are they transmitting these controls over DOCSIS (much faster than traditional low bandwidth OOB data channels).
Unless all of the STB's are ADSG, then no, they aren't using DOCSIS to signal the headend. |
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TheWiseGuyDog And ButterflyPremium,MVM
join:2002-07-04
East Stroudsburg, PA
kudos:2 Reviews:
 ·Optimum Online
| said by nukscull :said by cypherstream:Also how is the response time with trick play controls? Are they transmitting these controls over DOCSIS (much faster than traditional low bandwidth OOB data channels).
Unless all of the STB's are ADSG, then no, they aren't using DOCSIS to signal the headend. CV has used DOCSIS not Davic for OOB for a long time, in fact I do not believe they ever used Davic.
»newsroom.cisco.com/dlls/2004/hd_032304b.html
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| reply to cypherstream
That's what I thought. Hence the SA 4200's and not 3200's. |
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TheWiseGuyDog And ButterflyPremium,MVM
join:2002-07-04
East Stroudsburg, PA
kudos:2 Reviews:
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| reply to cypherstream
said by cypherstream:Why don't they enable data deduplication on the storage array in the datacenter? That way if someone records a show like CSI for example, and if you also record it... it's only using up space for 1 HD episode, rather than wastefully recording multiple copies, wasting space and disk utilization.
Because they would then be in violation of Copyright law. The Legal decision was based on each user having their own unique copy. That way the user is doing the copying. If CV made one copy then sent it to users later, it would almost certainly violate copyright laws.
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| It's just terribly inefficient. Might as well just give out regular DVR's with cheap off the shelf SATA hard drives, rather then spend ridiculous amounts of money on enterprise class 15k rpm / fiber channel / storage pools designed for high I/O's.
However, who's to say they aren't doing deduplication? In an EMC SAN for instance, dedupe is a standard feature. All it is is a checkbox in the web gui. I'm saving a bit of space deduping a bunch of virtual machine data on a storage array. When you have a bunch of Windows Servers, many of those O/S specific files are the same between each server. For example, how many discrete copies of calc.exe, wordpad.exe, etc. do you need?
Anyway, all I'm saying, is there's no way to prove they are not using some form of compression or efficient storage deduplication - however each account sees only what they 'chose' to record. Hence no copyright violations because I can't see my neighbors selections, only mine (which are limited by x number of tuners and 160gb of aggregate disk quota). Files are files... the SAN does the underlying translation. The O/S, software and end user has no idea... it's all handled on the fly within the storage array. |
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TheWiseGuyDog And ButterflyPremium,MVM
join:2002-07-04
East Stroudsburg, PA
kudos:2 Reviews:
·Optimum Online
| said by cypherstream:However, who's to say they aren't doing deduplication? In an EMC SAN for instance, dedupe is a standard feature.
Well the court documents which described the way the DVR will work and which is their legal basis for offering the system say they won't.
»www.lightreading.com/document.as···site=cdn
quote:
Cablevision argues that its RS-DVR is no different than an in-home DVR, because if 1,000 customers tap the RS-DVR to record a specific program, the system is designed to make 1,000 individual copies. Further, each copy is accessible only to the customer who made the original recording request.
»Re: [iO] Network DVR storage limits
»www.ca2.uscourts.gov/decisions/i···/hilite/
said by decision :Cablevision argues
2 that, because each RS-DVR transmission is made using a single
3 unique copy of a work, made by an individual subscriber, one that
4 can be decoded exclusively by that subscriber’s cable box, only
5 one subscriber is capable of receiving any given RS-DVR
6 transmission. This argument accords with the language of the
7 transmit clause, which, as described above, directs us to
8 consider the potential audience of a given transmission. We are
9 unpersuaded by the district court’s reasoning and the plaintiffs’
10 arguments that we should consider a larger potential audience in
11 determining whether a transmission is “to the public.”
If you believe they think they could keep it secret from the content holders who took them to court and will use a system that the court did not approve, hey good luck in business
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| Just sounds like a waste to me. Might as well issue DVR's then. They make them with MoCA and whole home DVR solutions now.
Just seems expensive to spend millions on tons of enterprise class low latency disk storage arrays capable of thousands of IOPs, maintain them, power and UPS them, and keep it all backed up and "5 9's" reliability. Rather than an off the shelf $43 250GB sata hard drive in a home DVR. |
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TheWiseGuyDog And ButterflyPremium,MVM
join:2002-07-04
East Stroudsburg, PA
kudos:2 Reviews:
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| Certainly, there is "waste", they have to do things in a very specific way in order not to violate copyright law. Still they claim they will save money, I seem to remember that part of the savings was due to lower service calls. The link below gives the fact that they expect to save about $100/DVR. » www.lightreading.com/document.as···lr_cable--
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NyNexit
join:2009-11-01
Huntington, NY | reply to cypherstream
your asking a lot from a company that can't get the bill right.  but keep dreaming. (great ideas though) |
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