On Wed, 13 Sep 2017 14:36:51 -0400, Richard Pieri wrote: > On 9/13/2017 11:44 AM, Robert Krawitz wrote: >> On Wed, 13 Sep 2017 11:38:36 -0400, Richard Pieri wrote: >>> 1080p video streams (MPEG-4) need about 5-8 Mbps burst bandwidth. >>> Gigabit Ethernet has practical throughput about 300Mbps. >> >> ??? I routinely get over 100 MB/sec (>800 Mbps) transferring files -- >> even with scp -- between systems with fast enough disks. > > If I'm not mistaken that's with jumbo frames enabled. Consumer NICs > typically do not support jumbo frames. Regardless, if you're getting > ~2.5 times my throughput estimate then your MythTV usage is consuming > about 2% of your available bandwidth instead of my 5% estimate, so > instead of wasting 95% of the network bandwidth by not using it you're > wasting 98% of it.
This is a laptop (Dell Precision M6500) talking to the on-board NIC on a consumer-grade motherboard. According to ifconfig, it's using an MTU of 1500 bytes. This is not using MythTV; it's simply using scp or rsync to copy files around. Obviously I'm not doing that continuously, but when I'm moving a lot of data (20-30 GB isn't uncommon), I want it to be fast. WiFi is simply not efficient for that. > If you were doing video editing then that would be a different story. > This is large(ish) scale bulk data transfers where high sustained > throughput is necessary. But then, you would do this kind of wiring in a > studio environment, not the entire residence. > > So, yeah, whole-home wiring just doesn't make sense. -- Robert Krawitz <r...@alum.mit.edu> *** MIT Engineers A Proud Tradition http://mitathletics.com *** Member of the League for Programming Freedom -- http://ProgFree.org Project lead for Gutenprint -- http://gimp-print.sourceforge.net "Linux doesn't dictate how I work, I dictate how Linux works." --Eric Crampton _______________________________________________ Discuss mailing list Discuss@blu.org http://lists.blu.org/mailman/listinfo/discuss