<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><br><div><div>On 30 Jun 2015, at 16:47, Michael Watson <<a href="mailto:michael@thewatsonfamily.id.au">michael@thewatsonfamily.id.au</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">On 30/06/2015 11:51 PM, Richard Shaw wrote:<br><blockquote type="cite">On Tue, Jun 30, 2015 at 8:26 AM, Tim Draper <<a href="mailto:veehexx@zoho.com">veehexx@zoho.com</a> <<a href="mailto:veehexx@zoho.com">mailto:veehexx@zoho.com</a>>> wrote:<br><br> i tried BTRFS about 9 months ago but found it to struggle under<br> load. i moved from btrfs to jfs/xfs (i forget which) and it was a<br> very noticeable improvement. I was having some BTRFS performance<br> issues which i assumed was down to the mythtv media partition. I<br> suspect i used XFS as i don't think JFS is natively out-the-box<br> supported under Fedora which i now use.<br> Currently on ext4 that I've had 4 streams going to it (3x HD<br> record, 1x HD livetv) and it didnt have any obvious visuals<br> issues. 2disk mdadm raid1, LVM with 3x ext4 partitions.<br><br><br>I'm not sure which Fedora release started support for JFS but it has been there for quite some time...<br><br>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.<br><br>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.<br><br>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.<br></blockquote>This can be due to the recordedseek table in the db becoming fragmented, a (fairly) recent commit added a sort/defragment of the recordedseek table to the optimize_mythdb.pl script, which fixed this problem on my system.<br></div></blockquote>BTW xfs has defragmentation utility package xfsdump. xfs_fsr is the application name.</div><div>Used xfs for more then 7 years, had outages, and never had any problem with rebuilding. This rebuilding also is extremely fast.<br><blockquote type="cite"><div style="font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><br><blockquote type="cite"><br>Thanks,<br>Richard<br><br><br>_______________________________________________<br>mythtv-users mailing list<br><a href="mailto:mythtv-users@mythtv.org">mythtv-users@mythtv.org</a><br><a href="http://lists.mythtv.org/mailman/listinfo/mythtv-users">http://lists.mythtv.org/mailman/listinfo/mythtv-users</a><br><a href="http://wiki.mythtv.org/Mailing_List_etiquette">http://wiki.mythtv.org/Mailing_List_etiquette</a><br>MythTV Forums:<span class="Apple-converted-space"> </span><a href="https://forum.mythtv.org/">https://forum.mythtv.org</a><br></blockquote><br>_______________________________________________<br>mythtv-users mailing list<br><a href="mailto:mythtv-users@mythtv.org">mythtv-users@mythtv.org</a><br><a href="http://lists.mythtv.org/mailman/listinfo/mythtv-users">http://lists.mythtv.org/mailman/listinfo/mythtv-users</a><br><a href="http://wiki.mythtv.org/Mailing_List_etiquette">http://wiki.mythtv.org/Mailing_List_etiquette</a><br>MythTV Forums:<span class="Apple-converted-space"> </span><a href="https://forum.mythtv.org/">https://forum.mythtv.org</a></div></blockquote></div><br></body></html>