[mythtv-users] Storage Directories - Rotate?
Michael T. Dean
mtdean at thirdcontact.com
Tue Jul 8 19:35:38 UTC 2008
On 07/08/2008 03:20 PM, Trey Thompson wrote:
> On Tue, Jul 8, 2008 at 1:46 PM, Michael T. Dean wrote:
>> On 07/08/2008 02:35 PM, Trey Thompson wrote:
>>> Is there a way to have the storage directories rotate? For example, I
>>> have two drives:
>>> I currently have all recordings going to drive 1.
>>> It's my understanding that if I setup another directory in the
>>> recording group to point to /mnt/drive2, then that will only be used
>>> when drive1 is full.
>>> Can this rotate so that as new recordings start, they go back and forth?
>> By default, Myth will select the "local" filesystem with the most space
>> available for new recordings, where "local" means one accessible through
>> the filesystem (whether an NFS/CIFS mount or actual local storage).
>> (Note that you can affect its preference, making some filesystems less
>> likely to be used, but that's another story.) The only time the default
>> rotation won't really work is if you have separate backends without NFS
>> On my system, which consists of 2 backends each with local-only storage
>> and no NFS exports, I've configured cardinputs such that the 1st and 4th
>> inputs defined are on the master backend and the 2nd and 3rd inputs are
>> on the slave backend. With that approach, the first recording to start
>> gets input 1 and, therefore, writes to the master backend. However, any
>> time 2 or more recordings overlap, the 2nd and 3rd will be written to
>> the slave backend's storage. When 4 overlap, the 4th will be back on
>> the master backend.
> Sweet! That's what I was looking for! I'll have it balance it out for now,
> then maybe later try to get tuners go to separate disks for performance
It actually does performance balancing, too--I just didn't go into any
detail on that. But, basically, it's part of the "you can affect its
preference ... but that's another story." See
the other story).
Basically, though, Myth tries to use the filesystem with the most
storage, but if it's already in use, it will prefer the next-most-free
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