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Premiere Elite performance enhancements

Discussion in 'TiVo Premiere DVRs' started by brentil, Oct 10, 2011.

  1. jfh3

    jfh3 New Member

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    Denver area
    My laptop has Gigabit for sure, router is WNDR3700, switches are 4 or 8 port Dlink or Netgears.

    All cabling is either Cat5e or Cat6 - didn't think that mattered.

    Will have to do more research and verification.
     
  2. megazone

    megazone Hardcore TiVo Geek

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    .worcester.m...
    A thought on the GigE. How does that switch connect into the TiVo itself? The Broadcom SoC has a Fast Ethernet interface (100Mbps), right? On the Premiere that is connected to the single Ethernet port.

    I could see them sticking the switch in the Elite and connecting three things to it - the Ethernet port, the MoCA interface, and the Broadcom Ethernet interface. That would mean the real connectivity into the system would still be the 100Mbps SoC interface, even if the external interface is GigE. It'd just be like using an external speed sensing switch on a Premiere, with an external MoCA ECB hanging off the switch. Only they stuffed it all inside the box.
     
  3. compnurd

    compnurd New Member

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    Oct 6, 2011
    All of this had me thinking... has anyone cracked open a Premiere over the last month or 2 to see if the layout changed?
     
  4. brentil

    brentil New Member

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    Do you have another gigabit system on your network to copy that video to now to see what types of speeds you get for other devices? You definitely are on gigabit though because if any part was at 100 Mbps you'd only be able to move 12.5 MBps maximum. Some part of your network is just preventing you from reaching the maximum capable speed, which a lot of times just isn't possible. Theoretical maximum would be 125 MBps on gigabit.
     
  5. jfh3

    jfh3 New Member

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    Denver area
    I have another system with GigE and I have 3 switches that should all be GigE. Pretty sure all the cable is Cat6, but I'll have to poke around and see if I can find something amiss. I'll copy the .TiVo file later today to see how fast it is.

    I do have a DAP-1522 wireless N bridge, but that shouldn't impact the wired part of the network, should it?
     
  6. aaronwt

    aaronwt UHD Addict

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    Northern...
    The DAP1522 also is a wired gigabit switch or AP. I use several of them. it shouldn't affect the speed unless a device is using wireless on it. But even then as long as there aren't a bunch of devices hogging the wireless bandwidth it should still be fine. With my DAp1522 units in bridge mode. My two tuner Premieres had identical transfer speeds as when connected to my gigabit backbone. SO even when it was connected to the wireless bridge, it still got 80Mb/s to 90Mb/s transfer rates. Although normally all my TiVos are on a wired connection.
     
  7. brentil

    brentil New Member

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    Sep 9, 2011
    Cat5e, Cat6, or Cat6a will all allow 1G speeds so if you have all of those you should be good. You are getting about 4x over what a 100 Mbps line can do so you are getting a benefit. The problem becomes as you add more switches they do have a 1 Gbps switching back-plane but they then share their uploads to the next switch layer so even if other devices aren't sending data actively they do have network chatter going on that eats a bit of bandwidth and creates resource contention. The moving of the data file between machines should help give an idea if it's your overall network it'll depend on if it's going across as many devices as the TiVo. If any of them have firmware updates you might want to look into that too.
     
  8. aaronwt

    aaronwt UHD Addict

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    Northern...
    I know with my consumer grade switches having more switches, to a certain point, should not hurt anything. I use fourteen DLink 5 port and 8 port Gigabit switches, plus several DAP1522 units in AP and bridge mode.
    Some devices have to go through four or five switches to access content. But I will get the same fast speeds from it whether going through all those switches or going through one switch.

    For instance, I will still get 900+Mb/s throughput from PC to PC whether they are connected to the same Dlink gigabit switch or they are going through five of the Dlink gigabit switches.
     
  9. brentil

    brentil New Member

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    Sep 9, 2011
    I think maybe it's not actually running at Gigabit then as I realized I was mixing terms.

    4365 MB in 10 minutes is 7.3 MB/s or 58 Mb/s for the average length of the file

    If the TiVo was running at 1G and all connections are 1G you should be hitting much higher speeds.
     
  10. ghuido

    ghuido New Member

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    I've been using DAP-1522 for a couple of years as the main bridge on TIVO HD. Always hit the throughput capacity of the TIVO HD before I have to worry about the DAP-1522 bandwidth capacity.
     
  11. Philmatic

    Philmatic Member

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    Sep 17, 2003
    Yeah, I don't understand what I was getting at there. lol
     
  12. RichB

    RichB Member

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    Apr 2, 2003
    Massachusetts
    According to my NetGear switch, the Elite is connected gigabit.

    - Rich
     
  13. brentil

    brentil New Member

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    Sep 9, 2011
    With that much of my content copy/pasted a mention would be nice. :D
     
  14. chrislemasters

    chrislemasters New Member

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    Jan 13, 2007
    Which post are you referring to? Or is it the link?
     
  15. jfh3

    jfh3 New Member

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    Denver area
    The blogger lifted much of brentil's text verbatim. :(
     
  16. Philmatic

    Philmatic Member

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    Sep 17, 2003
    Yeah,. I noticed it that... down to the "(instead of ?)".
     
  17. brentil

    brentil New Member

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    Sep 9, 2011
    He does reference the thread but not everyone clicks through. The other blogger who used some of my content from the v16 thread cited me at least.

    But back to business, more performance!
     
  18. smbaker

    smbaker Well-Known Member

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    May 24, 2003
    Additional switches will increase your latency, but it shouldn't hurt your throughput. Fortunately, I can't think of any reason why a few milliseconds of additional latency would matter for a Tivo.

    14 switches is an impressive number for a household. I only have 4 switches, although the one in the main computer room is a fancy managed switch. Whatever do you need 14 switches for? :)
     
  19. aaronwt

    aaronwt UHD Addict

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    Northern...
    My collection of networked devices keeps growing since just about everything is IP based now. The largest percentage of networked devices I have are my cameras(ten). But with multiple electronic devices(multiple TiVos, multiple Xbox 360s, multiple media players, multiple PCs/servers/NAS devices etc), the total goes up pretty quick. Too quick.
     

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