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Tim Phipps wrote:
<blockquote
cite="mid200704040936.14498.mythtv-users@phipps-hutton.freeserve.co.uk"
type="cite">
<pre wrap="">On Wednesday 4 April 2007 8:31 am, James Warden wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Are disks formatted with
ext3 showing the same fragmentation factor ? And does one know the growth
rate of this factor ? (what are the relevant variables : disk size ?
technology ? file system ?)
</pre>
</blockquote>
<pre wrap=""><!---->Using filefrag on my current disk:
/myth/1028_20070223002400.mpg: 2977 extents found, perfection would be 14
extents
/myth/1028_20070322002900.mpg: 1473 extents found, perfection would be 16
extents
/myth/1032_20070220003400.mpg: 2566 extents found, perfection would be 11
extents
I'm in the middle of upgrading my storage and here's what I get on the new
disk:
/mnt/myth/1028_20070223002400.mpg: 30 extents found, perfection would be 14
extents
/mnt/myth/1028_20070322002900.mpg: 33 extents found, perfection would be 16
extents
/mnt/myth/1032_20070220003400.mpg: 22 extents found, perfection would be 11
extents
</pre>
</blockquote>
I'm also seeing heavily fragmented transcoded files. I'm also using
ext3 on Ubuntu. Any idea if this causes noticable performance
problems?<br>
<br>
I tend to see livetv pauses when a transcode complete ... when the
original file is deleted. I wonder if this fragmentation could be
contributing.<br>
<br>
I just used the default filesystem when installing Ubuntu. If I knew
more about this before starting, I might have tried XFS. It's a pain
to change now. :(<br>
<br>
Matt<br>
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