On Friday 14 October 2005 14:25, Alex Brekken wrote: > 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! > > On 10/14/05, Steve Adeff <[EMAIL PROTECTED]> wrote: > > On Friday 14 October 2005 10:16, Brandon Beattie wrote: > > > The current limitations on number of streams has to do with what > > > hardware you choose to use. This includes tuner cards, hard drives, > > > network cards, and CPU. I think it would still be rather easy to get > > > 10+ streams recording and 4-5 being played back (1 local, 3-4 remote) > > > before you see any problems. To do this you would need either hardware > > > assisted analog encoders, or an HD tuner because they won't use more > > > > than > > > > > 3% or so CPU. To reach a 10Rec 5Play number, you would want a good > > > processor and memory, something 3.4Ghz or over would be fine -- If > > > you're not going to watch video locally though, I bet you could do all > > > this with 2Ghz or less. Disk usage is the next issue. Using raid > > > 0, 5 or 10 would help in this areas you may be able to do 15 streams > > > total with 2-3 striped drives I would bet. Networking will be the final > > > issue. HD streams run up to just under 20Mb/s. As much as we wish to > > > get 1Gb/s speeds all the time, expecting much over 400Mb/s constant is > > > not always possible. Myth struggles to play video smoothly unless it > > > feels like it has room to breath and almost no packet loss. > > > > another option if you find yourself recording this much is to use LVM > > (logical > > volume manager). It would allow you to connect, say four 300gig drives > > and use them all as one AND stripe data across them (like RAID 0). Or you > > could > > use 3 striped and the 4th as a parity drive in case one dies. > > This would most definitely give you the drive speed required to not only > > record 4+ streams at once, but play back equally as many. > > > > > > Steve
from my understanding, yes it is, and properly set up you can also add and remove drives from an LVM at any point as well. I recently discovered LVM so I've yet to implement it, but I did a good amount of research and it seems to be quite easy now and I did not see anything that made me think I'd have to reinstall. Of course, I wouldn't use a LVM for your root partition, at least until you know what your doing... I'm just going to be using it for my storage drives. Steve _______________________________________________ mythtv-users mailing list [email protected] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
