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MediaPortal 1
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General Support
Many discontinuities when simultaneously recording from 3 tuners
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<blockquote data-quote="RonD" data-source="post: 1110982" data-attributes="member: 117536"><p>Glad you are up/running, was curious about your results. I don't have USB tuners, just HDHR ATSC ethernet connected tuners. Used a test system, Dell Inspiron "everyday" laptop, Win8.1, Ivybridge i3-3227U 2-core 4-thread, 1.9 GHz. For testing 5 HDHR tuners 100 mbs Ethernet, with 3 MePo Clients, local, 2 remote. Used Win8.1 Task Manager to monitor disk traffic. Disabled Windows Defender realtime virus scan on all systems.</p><p></p><p>Ran same 5 channels for testing. US ATSC video mbps varies for different channels</p><p>KPIX=17 mbps, KBCW=17mbps, KTVU=12.9mbps, timeshift 3 clients</p><p>KNTV=13.3mbps, KGO=7mbps, record 2 programs to generate more disk traffic.</p><p></p><p>With 2 remote clients, ethernet shows RX=95mbps (ATSC tuners), TX=30mbps (2 remote clients). Sort of surprised 100 mbps enet supports 5 hdhrs tuners 95% busy.</p><p></p><p>********************</p><p>With laptop internal sata HDD, disk traffic</p><p>WR=10 MB/s, RD=6 MB/s, 3 Clients timeshift -5 minutes behind, RD=0 if 3 clients no timeshift. Without active timeshift, looks like windows uses memory buffered data for MePo Client reads.</p><p></p><p>No MePo Client video glitches if drive C: is less than 25% busy with MePo Traffic. MePo clients show lots of video glitches when “windows stuff” runs in background and pushes drive C: = 100% busy (OneDrive, livecomm, wwahost). No client video glitches if average drive activity less than 25%. Tried to disable background stuff, but from time to time windows</p><p>generates disk traffic. I usually setup MePo with 2nd drive for timeshift/recording.</p><p></p><p>********************</p><p>USB3.0 Port: External USB3.0 WD-Passport-Ultra portable drive 1TB</p><p></p><p>WR=9 MB/s, RD=6 MB/s, 3 Clients timeshift -5 minutes behind, RD=0 if 3 clients no timeshift</p><p>with timeshift, drive utilization = 15-20%</p><p></p><p>No real MePo client video glitches.</p><p></p><p>********************</p><p>USB2.0 Port: same External USB3.0 WD-Passport-Ultra portable drive 1TB</p><p></p><p>WR=9 MB/s, RD=6 MB/s, 3 Clients timeshift -5 minutes behind, RD=0 if 3 clients no timeshift</p><p>with timeshift, drive utilization = 60-70%, peaks 80+%</p><p></p><p>Lots of MePo Client video glitches, seems to happen when drive gets busy.</p><p></p><p>I never saw any crashes for my tests. Maybe USB Tuners interacting with USB external HDD are part of that story. My Windows USB drivers show the following.</p><p></p><p>Intel(R) USB 3.0 eXtensible Host Controller - 0100 (Microsoft)</p><p>Driver = 6.3.9600.17292, 9/2/2014</p></blockquote><p></p>
[QUOTE="RonD, post: 1110982, member: 117536"] Glad you are up/running, was curious about your results. I don't have USB tuners, just HDHR ATSC ethernet connected tuners. Used a test system, Dell Inspiron "everyday" laptop, Win8.1, Ivybridge i3-3227U 2-core 4-thread, 1.9 GHz. For testing 5 HDHR tuners 100 mbs Ethernet, with 3 MePo Clients, local, 2 remote. Used Win8.1 Task Manager to monitor disk traffic. Disabled Windows Defender realtime virus scan on all systems. Ran same 5 channels for testing. US ATSC video mbps varies for different channels KPIX=17 mbps, KBCW=17mbps, KTVU=12.9mbps, timeshift 3 clients KNTV=13.3mbps, KGO=7mbps, record 2 programs to generate more disk traffic. With 2 remote clients, ethernet shows RX=95mbps (ATSC tuners), TX=30mbps (2 remote clients). Sort of surprised 100 mbps enet supports 5 hdhrs tuners 95% busy. ******************** With laptop internal sata HDD, disk traffic WR=10 MB/s, RD=6 MB/s, 3 Clients timeshift -5 minutes behind, RD=0 if 3 clients no timeshift. Without active timeshift, looks like windows uses memory buffered data for MePo Client reads. No MePo Client video glitches if drive C: is less than 25% busy with MePo Traffic. MePo clients show lots of video glitches when “windows stuff” runs in background and pushes drive C: = 100% busy (OneDrive, livecomm, wwahost). No client video glitches if average drive activity less than 25%. Tried to disable background stuff, but from time to time windows generates disk traffic. I usually setup MePo with 2nd drive for timeshift/recording. ******************** USB3.0 Port: External USB3.0 WD-Passport-Ultra portable drive 1TB WR=9 MB/s, RD=6 MB/s, 3 Clients timeshift -5 minutes behind, RD=0 if 3 clients no timeshift with timeshift, drive utilization = 15-20% No real MePo client video glitches. ******************** USB2.0 Port: same External USB3.0 WD-Passport-Ultra portable drive 1TB WR=9 MB/s, RD=6 MB/s, 3 Clients timeshift -5 minutes behind, RD=0 if 3 clients no timeshift with timeshift, drive utilization = 60-70%, peaks 80+% Lots of MePo Client video glitches, seems to happen when drive gets busy. I never saw any crashes for my tests. Maybe USB Tuners interacting with USB external HDD are part of that story. My Windows USB drivers show the following. Intel(R) USB 3.0 eXtensible Host Controller - 0100 (Microsoft) Driver = 6.3.9600.17292, 9/2/2014 [/QUOTE]
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