Steve, is there any way to add an LVM on an up-and-running system, or
must it be done during the OS install when partitioning the disk?
(sorry, I don't mean to hijack this thread but I figured this would be
a quick answer) Thanks!<br><br><div><span class="gmail_quote">On 10/14/05, <b class="gmail_sendername">Steve Adeff</b> <<a href="mailto:adeffs@gmail.com">adeffs@gmail.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
On Friday 14 October 2005 10:16, Brandon Beattie wrote:<br>><br>> The current limitations on number of streams has to do with what<br>> hardware you choose to use. This includes tuner cards, hard drives,<br>> network cards, and CPU. I think it would still be rather easy to get
<br>> 10+ streams recording and 4-5 being played back (1 local, 3-4 remote)<br>> before you see any problems. To do this you would need either hardware<br>> assisted analog encoders, or an HD tuner because they won't use more than
<br>> 3% or so CPU. To reach a 10Rec 5Play number, you would want a good<br>> processor and memory, something 3.4Ghz or over would be fine -- If<br>> you're not going to watch video locally though, I bet you could do all
<br>> this with 2Ghz or less. Disk usage is the next issue. Using raid<br>> 0, 5 or 10 would help in this areas you may be able to do 15 streams<br>> total with 2-3 striped drives I would bet. Networking will be the final
<br>> issue. HD streams run up to just under 20Mb/s. As much as we wish to<br>> get 1Gb/s speeds all the time, expecting much over 400Mb/s constant is<br>> not always possible. Myth struggles to play video smoothly unless it
<br>> feels like it has room to breath and almost no packet loss.<br><br><br>another option if you find yourself recording this much is to use LVM (logical<br>volume manager). It would allow you to connect, say four 300gig drives and
<br>use them all as one AND stripe data across them (like RAID 0). Or you could<br>use 3 striped and the 4th as a parity drive in case one dies.<br>This would most definitely give you the drive speed required to not only<br>
record 4+ streams at once, but play back equally as many.<br><br><br>Steve<br>_______________________________________________<br>mythtv-users mailing list<br><a href="mailto:mythtv-users@mythtv.org">mythtv-users@mythtv.org
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