[mythtv-users] What is best filesystem for recordings?

[James Linder]

> On 1 Jul 2015, at 3:08 am, mythtv-users-request at mythtv.org wrote:
> 
>> i tried BTRFS about 9 months ago but found it to struggle under load. i
>> moved from btrfs to jfs/xfs (i forget which) and it was a very noticeable
>> improvement. I was having some BTRFS performance issues which i assumed was
>> down to the mythtv media partition. I suspect i used XFS as i don't think
>> JFS is natively out-the-box supported under Fedora which i now use.
>> Currently on ext4 that I've had 4 streams going to it (3x HD record, 1x HD
>> livetv) and it didnt have any obvious visuals issues. 2disk mdadm raid1,
>> LVM with 3x ext4 partitions.
> 
> 
> I'm not sure which Fedora release started support for JFS but it has been
> there for quite some time...
> 
> Adding my own $.02... Back when I only had a 500GB recording drive and a
> 2-tuner HDHR ATSC tuner I tried XFS, JFS, and EXT4 but I couldn't tell any
> difference, my system simply wasn't demanding enough to matter, so I
> settled on EXT4 since it's the default for Fedora.
> 
> I now have a 2TB recording drive and added a 3 tuner HDHR Prime... Still on
> the recording side not very demanding, I don't have a bunch of simultaneous
> recordings but one thing I have noticed is a large lag (up to 10 seconds?)
> of lag between when I hit play and the recording actually starts playing.
> 
> It's annoying but not bad enough to take drastic measures but it would be
> nice to know if changing file system types would fix this.

I do not see a delay using 1T xfs.

In the past I have seen delays that were mysql related. Cleaning up the DB fixed this

James