Re: [mythtv-users] Adding extra recorder disk space for Christmas !
On Fri, Dec 17, 2004 at 12:01:44AM -0800, Brad Templeton wrote: On Fri, Dec 17, 2004 at 06:52:40AM +, Terry Barnaby wrote: I didn't think that the overlay file system was supported yet with the linux 2.6 kernels ? If it is where can I get it ? I would be curious too, I thought those projects were mostly on hold. In QNX, another unix-inspired OS with a microkernel architecture, filesystems are inherently overlay, it's not a special filesystem. In unix/linux, when you mount a filesystem at /mnt, whatever files were in /mnt at the time become invisible. In QNX, they remain visible. This seems to me the right behaviour, nothing special needed. if you wanted to mount on an empty directory you can do that. I'd say this depends on the write semantics. As long as they're clear it's less confusing. But there is the I'm transplanting this directory to a new partition and mounting it in the same place situation, wherein you'll have two duplicate copies of everything, which can get a little messy... Mostly, though, it's that people don't *expect* mounts to be transparent. Where, by people, I mean *nix admins. Indeed, we might see people using USB2 disks for Myth routinely if there were a way to allocate files to external disks down the road, as the way to build the video library instead of burning DVDs. Indeed. A little more semantics on that would be nice. You could for example, have a feature in myth to say you want to take a recording offline. It stays in the database, but the file is moved to a removable medium (USB disk or DVD or CD-R). You allow browse of the archived materials, and when you pick one it says, Go get DVD #5 or Get USB disk #2 Yes! This is precisely what we were wanting to do. We were considering writing a script that moved the file to a DVD, told you how to label it, and then building a 10-second or so MPEG placeholder file to plug into that slot on the drive--which told you the name of the disc you'd archived it to. Cheers, -- jra -- Jay R. Ashworth[EMAIL PROTECTED] Designer Baylink RFC 2100 Ashworth AssociatesThe Things I Think'87 e24 St Petersburg FL USA http://baylink.pitas.com +1 727 647 1274 If you can read this... thank a system adminstrator. Or two. --me ___ mythtv-users mailing list [EMAIL PROTECTED] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] Adding extra recorder disk space for Christmas !
On Fri, Dec 17, 2004 at 06:52:40AM +, Terry Barnaby wrote: I didn't think that the overlay file system was supported yet with the linux 2.6 kernels ? If it is where can I get it ? I would be curious too, I thought those projects were mostly on hold. In QNX, another unix-inspired OS with a microkernel architecture, filesystems are inherently overlay, it's not a special filesystem. In unix/linux, when you mount a filesystem at /mnt, whatever files were in /mnt at the time become invisible. In QNX, they remain visible. This seems to me the right behaviour, nothing special needed. if you wanted to mount on an empty directory you can do that. My first disk is 200G and the second disk is 200G. The first is full with recordings (although a lot will expire). I need to have 200+200G available for recordings, so I can't just mount the second disk over the first disks recordings directory. If you had an overlay you possibly could, but anyway, with your 2 disks equal you can just barely pull off the LVM switcheroo we described here. However, the warning about xfs was an important one, you can't shrink it, so you had better stick with ext2/ext3 for when you pull the disk. You might, to be safe, want to have slightly less than 200gb on the original disk when you do this, though in theory it could be full and still do the giant move. You have to move the files so you can wipe it and convert it -- or the video partition -- to lvm. If your new disk were smaller than your old video, you could pull this off if you had some other spare space you could grab temporily, perhaps on a USB2 external disk -- those are getting really cheap now, I have seen the cases for $30. Indeed, we might see people using USB2 disks for Myth routinely if there were a way to allocate files to external disks down the road, as the way to build the video library instead of burning DVDs. You could for example, have a feature in myth to say you want to take a recording offline. It stays in the database, but the file is moved to a removable medium (USB disk or DVD or CD-R). You allow browse of the archived materials, and when you pick one it says, Go get DVD #5 or Get USB disk #2 ___ mythtv-users mailing list [EMAIL PROTECTED] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] Adding extra recorder disk space for Christmas !
Terry Barnaby wrote: ... My first disk is 200G and the second disk is 200G. The first is full with recordings (although a lot will expire). I need to have 200+200G available for recordings, so I can't just mount the second disk over the first disks recordings directory. Why mount the new disk on another mount point, move the biggest, oldest files that you don't anticipate deleteing any time soon into the new directory and make symlinks for each moved file. -- bjm ___ mythtv-users mailing list [EMAIL PROTECTED] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
RE: [mythtv-users] Adding extra recorder disk space for Christmas !
Sorry, the system is Linux Fedora2 using ext3 file system. I didn't think that the overlay file system was supported yet with the linux 2.6 kernels ? If it is where can I get it ? My first disk is 200G and the second disk is 200G. The first is full with recordings (although a lot will expire). I need to have 200+200G available for recordings, so I can't just mount the second disk over the first disks recordings directory. Cheers This is just my opinion, your milage may vary. The way I would add the extra drive is to add the drive and then create a LVM. Add the new drive to the LVM and then transfer all your files to the new drive. Once the old drive is empty you can reformat it and add it to the LVM. That is how I added a second drive to my system. Once everything is transfered change the recording location to your new drive group. I see you are using ext3, you will probably get a decent improvement in performance if you set up your LVM with either xfs or jfs. Both of those handle large files better than ext3. Bill ___ mythtv-users mailing list [EMAIL PROTECTED] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] Adding extra recorder disk space for Christmas !
One thing to remember with XFS, particularly for short-term storage, is that XFS partitions cannot be shrank, only enlarged. I'm running into this problem right now on my myth box, I want to re-allocate some space to another partition. William wrote: This is just my opinion, your milage may vary. The way I would add the extra drive is to add the drive and then create a LVM. Add the new drive to the LVM and then transfer all your files to the new drive. Once the old drive is empty you can reformat it and add it to the LVM. That is how I added a second drive to my system. Once everything is transfered change the recording location to your new drive group. I see you are using ext3, you will probably get a decent improvement in performance if you set up your LVM with either xfs or jfs. Both of those handle large files better than ext3. Bill -- Jason Ramey [EMAIL PROTECTED] ___ mythtv-users mailing list [EMAIL PROTECTED] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] Adding extra recorder disk space for Christmas
One thing to remember with XFS, particularly for short-term storage, is that XFS partitions cannot be shrank, only enlarged. I'm running into this problem right now on my myth box, I want to re-allocate some space to another partition. William wrote: I've yet to encounter any filesystem that does not have this problem. This just seems to be a general issue with LVM. This issue also crops up on high end SAN storage systems. Don't ever expect to be able to shrink a filesystem. [deletia] ___ mythtv-users mailing list [EMAIL PROTECTED] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] Adding extra recorder disk space for Christmas
Never had any problems with shrinking reiserfs under LVM... [EMAIL PROTECTED] wrote: I've yet to encounter any filesystem that does not have this problem. This just seems to be a general issue with LVM. This issue also crops up on high end SAN storage systems. Don't ever expect to be able to shrink a filesystem. [deletia] -- Jason Ramey [EMAIL PROTECTED] ___ mythtv-users mailing list [EMAIL PROTECTED] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] Adding extra recorder disk space for Christmas
On Fri, 2004-12-17 at 16:09, [EMAIL PROTECTED] wrote: I've yet to encounter any filesystem that does not have this problem. This just seems to be a general issue with LVM. This issue also crops up on high end SAN storage systems. Don't ever expect to be able to shrink a filesystem. I have not had a problem using e2resize to shrink an unmounted ext3 filesystem and then using LVM to reallocate PE's. I did have some issues using 'pvmove' to free a disk from LVM because of incompatibilities of kernel.org kernels vs LVM-patched RedHat kernels. The workaround I used was just to boot single user mode with a patched redhat kernel for the pvmove operation. Cheers, Mark ___ mythtv-users mailing list [EMAIL PROTECTED] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] Adding extra recorder disk space for Christmas !
On Fri, Dec 17, 2004 at 05:35:54AM -0500, William wrote: This is just my opinion, your milage may vary. The way I would add the extra drive is to add the drive and then create a LVM. Add the new drive to the LVM and then transfer all your files to the new drive. Once the old drive is empty you can reformat it and add it to the LVM. That is how I added a second drive to my system. Once everything is transfered change the recording location to your new drive group. I see you are using ext3, you will probably get a decent improvement in performance if you set up your LVM with either xfs or jfs. Both of those handle large files better than ext3. Just to repeat, since this suggestion has been made several times and I guess in the flood of messages in this list folks are not reading the earlier messages -- for this particular application, you need a filesystem you can shrink back down, which xfs won't do, but ext2 will. JFS can't be shrunk either. I must admit, the symlink plan (mount your new filesystem, point your myth box to that new directory, symlink in all the old files to the new directory) is the quickest and simplest, though you will not be able to delete shows directly from the old disk until you reverse the process. ___ mythtv-users mailing list [EMAIL PROTECTED] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] Adding extra recorder disk space for Christmas !
MythTv doesn't support multiple directories. You should really have used LVM upon the initial setup of your system. It isn't hard and truely is flexible. I have expanded my volumes 3 times since I originally installed MythTV from 100GB to 300GB to 500GB. Anyhow the information on how to LVM is in the MythTV Documentation section and is pretty straight forward. On Thu, 16 Dec 2004 15:58:20 +, Terry Barnaby [EMAIL PROTECTED] wrote: Hi, I would like to add an extra disk, temporarily, to my server for Christmas recording storage. I would like to do something like add multiple directororys to the MythTv Directory to hold recordings setting like: /data/video:/extra/video Has anyone any ideas on how to easily do this ? This is temporary, and so I don't want to get involved in raid etc etc Cheers Terry ___ mythtv-users mailing list [EMAIL PROTECTED] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users ___ mythtv-users mailing list [EMAIL PROTECTED] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] Adding extra recorder disk space for Christmas !
Switching over to LVM has to be done carefully, but I've done it and so it can't really be all that hard. The basic steps: 1) install the new disk, and set it up for LVM as a big physical volume in a volume group. 2) make a single big logical volume on this, and then format for your favorite filesystem (I use xfs, as suggested by Jarod's guide). 3) hopefully your current video files will fit on this new filesystem, so that you can copy them all over to it. this took some time on my system. 4) then, destroy the old video partition and add it to the LVM volume group to extend the logical volume. 5) grow your xfs (or whatever) file system to span both your new disk and the old partition. I found the how-to document at http://www.tldp.org/HOWTO/LVM-HOWTO/ to be very helpful. Peter On Thu, 16 Dec 2004 11:24:20 -0800, Fa Yoeu [EMAIL PROTECTED] wrote: MythTv doesn't support multiple directories. You should really have used LVM upon the initial setup of your system. It isn't hard and truely is flexible. I have expanded my volumes 3 times since I originally installed MythTV from 100GB to 300GB to 500GB. Anyhow the information on how to LVM is in the MythTV Documentation section and is pretty straight forward. On Thu, 16 Dec 2004 15:58:20 +, Terry Barnaby [EMAIL PROTECTED] wrote: Hi, I would like to add an extra disk, temporarily, to my server for Christmas recording storage. I would like to do something like add multiple directororys to the MythTv Directory to hold recordings setting like: /data/video:/extra/video Has anyone any ideas on how to easily do this ? This is temporary, and so I don't want to get involved in raid etc etc Cheers Terry ___ mythtv-users mailing list [EMAIL PROTECTED] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users ___ mythtv-users mailing list [EMAIL PROTECTED] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users ___ mythtv-users mailing list [EMAIL PROTECTED] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
[mythtv-users] Adding extra recorder disk space for Christmas !
Hi, I would like to add an extra disk, temporarily, to my server for Christmas recording storage. I would like to do something like add multiple directororys to the MythTv Directory to hold recordings setting like: /data/video:/extra/video Has anyone any ideas on how to easily do this ? This is temporary, and so I don't want to get involved in raid etc etc Cheers Terry ___ mythtv-users mailing list [EMAIL PROTECTED] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
