Displaying 2 results from an estimated 2 matches for "41gb".
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2004 Sep 10
3
FLAC status
....54GB) which contained tracks ripped from many varied albums. I
unflacced them and compared their md5 signature with the same from the
original .wav. They were all perfect. I didn't use the -V option just in
case of any chance of mis-reporting. I hope to test it with the complete
collection of ~41GB uncompressed, but it's a matter of finding the time.
I currently have these files compressed using shorten. I was interested
in how much FLAC could improve on this. The figures for the files I
processed are:
wav shn flac
GB 8.54 5.51 5.11
% 100 64.5 59.8
Extrapolating that over the ~41GB,...
2009 Nov 18
0
open(2), but no I/O to large files creates performance hit
...radation.
It doesn''t make sense that this would help unless there is some cache/VM
pollution resulting from the open(2).
The basic situation is that there are 8 SAS applications running a
statistical procedure. The 8 applications read the same 26GB file but
each writes its own unique 41GB output file (using vanilla
read(2)/write(2) of 4K/8K/16K I/O sizes). All I/O going to the same
mirrored ZFS filesystem. The performance problem occurs only if the 41
GB output files exist. In this situation, SAS will open the file to be
overwritten for exclusive read/write so no one will mess...