[mythtv-users] Frontend hangs and loses conneciton to backend - RESOLVED

Buchanan, Paul (West) Paul.Buchanan at thomson.com
Mon Oct 25 18:22:08 UTC 2004

On Friday, October 22, 2004 4:50 PM, mythtv-users-bounces at mythtv.org
> Yes! I have an LVM2 partition on my main mythbox of 495GB (yes, thats
> ~1/2 TB), and almost like clockwork when it hits 91% full, the IOBOUND
> errors.  I am using reiserfs and according to their site, once
> partitions start getting close to full, performance can suffer.  On an
> LVM2 partition of that size, the "suffering" is magnified to the point
> that my system grinds to a halt virtually.  I witnessed the same
> problem simply cp'ing a file to the same partition when it was 91%
> full, which confirmed that MythTV was simply a victim of the system.
> According to namesys, all filesystems suffer to some extent, so that
> could be what you're seeing.
> P.S. The reason my 495GB partition even got that full is I turned
> MythTV loose on the Olympics with "Record when this program is on
> anywhere" and it recorded EVERYTHING--basically filling all 4 of my
> backends.  Doesn't take too many 4 hour HD sessions at 9 GB/hr to fill
> that drive!  I keep holding onto those shows thinking I might watch it
> some time before '08 :).

It would seem that XFS has the exact same issue.  My XFS partiton starts exhibiting the IOBOUND errors around 93% full, which makes the backend hang.  So, for reiser and xfs, keep some free space on the partition to avoid this.

Thanks for the info James.


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