Missed that one by a mile.......I was totally wrong on that one.
Here is the PRTG report.....
http://www.thegreenbutton.tv/forums/vie ... 311#p22311
13 mbps per HD Stream on a Ceton Infini4.
Mixing HDHRPrime + Ceton ETH ?
- Crash2009
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Agree ... the network bandwidth isn't at all likely to be an issue. I'd be more concerned about whether or not a hard drive can sustain the recording bandwidth if I went to 9 tuners. Assuming 9 HD streams at perhaps 20Mb/s, that's 180Mb = 22.5MB/s that has to be written to a hard drive. That's well below the sustainable write speed for a disk (modern drives can typically do over 100MB/s) ... HOWEVER => it's not a linear stream, so there would be a lot of seeks in between the writes (since there are 9 active files being written).
I'd assume the WMC buffers a lot of this data and the writes are relatively large ... so there shouldn't be any problem sustaining this rate. But it CAN get pretty busy => especially if there's also activity by a user watching something (either a different show or one of those being recorded) and perhaps an extender or two doing the same thing.
I'm just curious if anyone's pushed this to the limits of 9 (or even 12) active tuners. I suspect I'll end up buying one more Prime "just because" and testing with 9 recordings and 2 or 3 "watchers" all at the same time, just to test the limits a bit ... but it'd be nice to know if anyone else has already tried that.
I'd assume the WMC buffers a lot of this data and the writes are relatively large ... so there shouldn't be any problem sustaining this rate. But it CAN get pretty busy => especially if there's also activity by a user watching something (either a different show or one of those being recorded) and perhaps an extender or two doing the same thing.
I'm just curious if anyone's pushed this to the limits of 9 (or even 12) active tuners. I suspect I'll end up buying one more Prime "just because" and testing with 9 recordings and 2 or 3 "watchers" all at the same time, just to test the limits a bit ... but it'd be nice to know if anyone else has already tried that.
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We have 12 tuners (Ceton InfiniTV6 ETH and 3x SiliconDust duals for OTA). Each stream is less than 15 Mbps (theoretical max is 20 Mbps). 12 streams is nothing for a gigabit network.Crash2009 wrote:I don't think that's going to work. Each HD recording stream is about 1300 mbps (13% of your gig network). 7 HD recordings (7 X 1300) would put you at 91% of saturation. Your HTPC could play 1 of those streams through its own display system without adding to the network load. The minute somebody turns on an extender or plays a recording, I think you will get some network issues.McGary wrote: 9 HD channels at once
My 1300 mbps calculation is based upon testing with PRTG Network Monitor.
http://www.paessler.com/tools
Even with 5 extenders, which essentially double your throuput for the first 5 tuners, we rarely hit 1/3rd network utilization when all 12 tuners are in use.
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12 tuners !! I'm not surprised the Gb network doesn't have a problem with that. Do you record to a RAID-0 array? Or perhaps an SSD?
I'd think the disk activity with 12 streams (plus perhaps 5 active extenders) would be more than a single drive could keep up with.
I'd think the disk activity with 12 streams (plus perhaps 5 active extenders) would be more than a single drive could keep up with.