[mythtv-users] Disk space recovers slowly after deleting recordings
mythtv at rodsbooks.com
Tue Dec 11 14:52:51 UTC 2007
On Tuesday 11 December 2007 03:50:17 Michael T. Dean wrote:
> On 12/11/2007 03:44 AM, Dan Cotter wrote:
> > When I delete a recording its appears to happen instantly and the file
> > appears to be gone, but the free space recovers extremely slowly
> > (viewed by console command df), like a few mega byte per second is
> > free'd.
> Like about 8MiB/sec?
> > I am running ubunutu 7.10, nothing else is installed but ubuntu and
> > mythtv and nvidia drivers for my video card.
> > This is causing me some problems because sometimes when I record, it
> > must think there is not enough free space and over-writes something I
> > want to keep, even though I just deleted 10's of gigabytes of
> > recordings. Am I missing some sort of system setting here that forces
> > some sort of commit write back to disk or something?
> Turn off the slow deletes setting you turned on...
The drawback to doing this, as I understand it, is that the UI will freeze
while the delete is occurring, which can take a while. If this is a problem,
you can get the best of both worlds by disabling fast deletes and switching
to a filesystem that's faster at deleting files, such as XFS. (I believe JFS
is also fast at deleting files.) Unfortunately, switching from ext3fs to XFS
will require a backup/restore operation, so you'll need a lot of free disk
space or other storage somewhere. The pain of the switch may outweigh the
benefits it provides, so you might just want to keep this in mind for
whenever you plan other major changes, such as adding more disk space.
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