[mythtv-users] Preventing a file transfer from saturating the network

[Neil Salstrom]

No, come to think of it, it's not disk related at all.  My setup is:

Boot disk (system, home, mythconverg)
Disk for LiveTV and Recordings
Disk for movie .mkv's and .iso's

When the issue I describe is happening I'm copying to the movie disk
and it's causing and issue with what is being recorded to the LiveTV
disk.  At this point I think it is network related and I either need
to find a way to make it play nice or just be careful of when I copy
things.

Neil

On Wed, Dec 24, 2014 at 8:19 AM, Mark Boyum <mark at boyum.us> wrote:
> You aren't copying files to the same drive that hosts your MythConverg DB
> are you?  If so, it could be that drive doesn't seek so well and is choking
> trying to handle all of the seek table updates in addition to the file copy.
>
> On Wed, Dec 24, 2014 at 12:49 AM, Neil Salstrom <salstrom at gmail.com> wrote:
>>
>> Wow.... Thanks for all the suggestions.  I guess I did leave out that
>> this was using a NFS share and simply copying the file from one to the
>> other (not using cp in a terminal).  I don't believe it's an issue
>> with hard drive read / write speed as I can watch a recorded (on disk)
>> program if a file transfer is occurring without problems.  It's only
>> if the HDHomerun is in use during the transfer.
>>
>> If theoretical speed on a gigablit lan is 125 MB/s what is real world?
>>  According to the reported transfer rate across my network I'm hitting
>> up to ~110 MB/s then I add ~2 MB/s for the ATSC stream am I bumping up
>> against real world performance of my network?
>>
>> Perhaps the easiest solution would be to pay attention to when I need
>> to transfer files!
>>
>> Neil
>>
>> On Tue, Dec 23, 2014 at 11:33 AM, Joseph Fry <joe at thefrys.com> wrote:
>> >
>> >
>> > On Tue, Dec 23, 2014 at 11:55 AM, Simon Hobson <linux at thehobsons.co.uk>
>> > wrote:
>> >>
>> >> Joseph Fry <joe at thefrys.com> wrote:
>> >>
>> >> > Both devices should get a Link Local address (169.254.x.x)
>> >> > automatically, so communication to the HDHR shouldn't be an issue
>> >> > (assuming
>> >> > your using the HDHR device name and not an IP in your mythtv device
>> >> > configuration, which it does by default)
>> >>
>> >> Or better still, configure an IP subnet on the link - I'm something of
>> >> a
>> >> fan of deterministic setup !
>> >> Also it'll allow the roouting to be configured so that your PC/whatever
>> >> on
>> >> the main lan can still access the HDHR. It just requires the Myth
>> >> server to
>> >> have packet forwarding turned on, and to add a route for the subnet via
>> >> the
>> >> Myth server's main LAN address.
>> >
>> >
>> > This would require running a DHCP server on the new subnet, or assigning
>> > the
>> > HDHR a static address.  I find Link Local to be far simpler if your just
>> > connecting two devices directly to one another.  Deterministic is great,
>> > except you will never actually use the HDHR's IP for anything, so why
>> > bother.
>> >
>> > The only issue I ever had with this was that sometimes linux can be slow
>> > to
>> > assign a link local address... but you can actually force link local in
>> > the
>> > network interface configuration and it's instant.
>> >
>> > Another thing to look at is the network connection itself.  An HDHR
>> > doesn't
>> > use that much bandwidth typically... not so much that you should see
>> > problems on a gigabit network, or even an 100Mbit.  You might have an
>> > issue
>> > with your computer connecting to the switch synchronously instead of
>> > async.
>> > This would effectively cut your bandwidth in half since it can only send
>> > or
>> > receive, not both.
>> >
>> > Finally... you may have cabling/interference issues (check for dropped
>> > frames).  Or maybe this would justifying an upgrade to a Gigabit switch
>> > (can
>> > get them dirt cheap these days).
>> >
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