Andrew Morton wrote:
Anthony Wesley <[email protected]> wrote:
I compared ext2,ext3,xfs,vfat,reiser and reiser4.
The hands-down winner was ext2. All the others showed problems of either lower disk throughput
or dropped frames during video capture.
ext2 is a good filesystem. For that sort of application all the journaling
gunk can really get in the way.
You should have tested ext3 with data=writeback.
Ask and ye shall receive...
I created an ext3 fs, mounted it with data=writeback and gave it a quick spin.
The result? Lots of pauses and dropped frames during capture. This is during the part of the
process where I have gobs of free RAM that's being used for buffering so dropping frames here
is a cardinal sin.
Dunno why it's happening, but I saw it also with xfs and reiser4. ext2 on the other hand
chugs along happily, no pauses, no dropped frames until we run out of free RAM (takes about 2
minutes now after the simple kernel change).
I can understand dropped frames after we run out of ram, but not before.
regards, Anthony
--
Anthony Wesley
Director and IT/Network Consultant
Smart Networks Pty Ltd
Acquerra Pty Ltd
[email protected]
Phone: (02) 62595404 or 0419409836
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