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| MBE/SBE Setup Questions http://forums.linhes.org/viewtopic.php?f=6&t=16135 |
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| Author: | ik632 [ Tue Aug 14, 2007 10:20 am ] |
| Post subject: | MBE/SBE Setup Questions |
I'm migrating to a master/slave backend setup because I've ran out of space in my front/back for capture cards. I've read through the wiki and the linhes documentation and I think I get all of it. MBE 1. Edit hosts 2. Edit exports (export /myth) 3. Edit /etc/mysql/my.cnf (on master) 4. Create a /mnt/sbe directory (edit fstab to mount this using nfs) SBE 1. Edit hosts 2. Edit exports 3. Edit /etc/mythtv/mysql.txt (to direct it to MBE) 4. Create a /mnt/mbe directory (edit fstab to mount this using nfs) Now, the part where I get hung up is the fact that the instructions state to make a directory in /mnt on each machine. After creating those directories we'll mount the /myth directory from the other machine to it. So we have the following: Code: MBE: /mnt/sbe -> this is mounted in fstab as SBE:/myth SBE /mnt/mbe -> this is mounted in fstab as MBE:/myth After that the instructions say to create symbolic links on the SBE from /mnt/mbe/tv to /mnt/tv and then record things there. This makes sense so that any new recordings will be recorded and saved on the MBE. But, if I do this then the hard disk space on the SBE will not be utilized. The setup that I want to run is: Code: MBE:
PVR-150 HD3000 (QAM hd) 2 x 200gb (lvm) SBE: PVR-500 (mbe motherboard doesn't support it) Air2PC 0.2 (two of these for OTA hd) 40gb + 80gb + 60gb drives (lvm) What I want to do is to utilize the hard disk space in the slave and record the HD stream there; while also recording HD on my MBE. Then I'd like to use the master backend (which is also my frontend for playback) to watch recordings off of both boxen. Can I do this or am I stuck keeping all of the storage in the master and then just using the slave for holding extra capture cards? How would I change the nfs mounts to accomplish this? Thanks, IK632 |
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| Author: | nigelpearson [ Tue Aug 14, 2007 10:27 pm ] |
| Post subject: | |
Remove the NFS exports & mounts completely. The MBE will record stuff in its /myth/tv, and the SBE will record its stuff in its local /myth/tv. When you watch stuff that was recorded on the SBE, the recorded table will have the SBE hostname in it, so your frontend will contact the SBE's backend to stream the recording to your frontend. The only problems with this setup are: 1) You need to keep both boxes on if you want to be able to watch all of your recordings, and 2) if your disk recording usage isn't balanced, SBE /myth/tv drives could be full (and thus will need to delete old recordings to make way for new ones), while the MBE isn't. In this situation, 'Delete Recordings' will not show 100%. You will need to occasionally look at the 'Machine Status' page. |
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| Author: | khrusher [ Wed Aug 15, 2007 6:16 am ] |
| Post subject: | |
NFS mounts are required to share /myht/music and /myth/video |
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| Author: | ik632 [ Wed Aug 15, 2007 8:48 am ] |
| Post subject: | |
Thanks for the info guys. I think I'm going to push down the road of having each box store it's own recordings and then see how to optimize the space as things progress. For now the MBE will have the majority of storage space and the SBE will have the smaller storage amount. |
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| Author: | slowtolearn [ Wed Aug 15, 2007 9:15 am ] |
| Post subject: | |
ik632 wrote: Thanks for the info guys. I think I'm going to push down the road of having each box store it's own recordings and then see how to optimize the space as things progress. For now the MBE will have the majority of storage space and the SBE will have the smaller storage amount. You may be interested in the work the MythTV devs are doing with Storage Groups - http://svn.mythtv.org/trac/changeset/12151 ...
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| Author: | nigelpearson [ Wed Aug 15, 2007 5:10 pm ] |
| Post subject: | |
khrusher wrote: NFS mounts are required to share /myht/music and /myth/video
Usually, but in this situation, the frontend is on the MBE (i.e.the SBE doesn't need anything except somewhere to record its TV to) |
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| Author: | nigelpearson [ Wed Aug 15, 2007 5:18 pm ] |
| Post subject: | |
slowtolearn wrote: You may be interested in the work the MythTV devs are doing with Storage Group
Yes. With a more recent frontend/backend, you can specify a list of volumes. I haven't tried it with NFS cross mounts/shares from different machines, though. The thought of what happens at boot or restart time scares me 
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| Author: | slowtolearn [ Wed Aug 15, 2007 8:06 pm ] |
| Post subject: | |
nigelpearson wrote: slowtolearn wrote: You may be interested in the work the MythTV devs are doing with Storage Group Yes. With a more recent frontend/backend, you can specify a list of volumes. I haven't tried it with NFS cross mounts/shares from different machines, though. The thought of what happens at boot or restart time scares me |
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| Author: | cecil [ Wed Aug 15, 2007 11:49 pm ] |
| Post subject: | |
Storage groups only works w/ SVN, not 0.20. |
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| Author: | slowtolearn [ Thu Aug 16, 2007 6:35 am ] |
| Post subject: | |
cecil wrote: Storage groups only works w/ SVN, not 0.20. Understood, was pointing out why I had not played with Storage Groups yet (still running 0.20)
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