[vdr] Re: two or more harddrives and performance (filesystemstreaming performance benchmark)

[Jon Burgess <mplayer@jburgess.uklinux.net>]

Jon Burgess wrote:

> As soon as the benchmark tries two streams ext3 performs really badly. 
> Writing at 0.48MB/s is barely enough for a single DVB TV channel.
I did some more tests over the weekend and I think that the test has 
uncovered a major performance regression for ext2/3 in 2.6. Running the 
same test on a 2.4.22 kernel gives much better numbers.

Write speed in MB/s using ext2 for 1 and 2 streams:

Streams:         1      2
linux-2.4.22   10.47   6.98
linux-2.6.2     9.71   0.34

I'll pursue this with LKML and see if anyone has any comments. I 
recommend staying away from using the vdr+ext2/3+linux-2.6 combination 
for now.

   Jon




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