Just installed a new server (PIII 600, 392Mb RAM, Mylex
ExtremeRAID (DAC1164P, 64Mb Cache), Mandrake 7.0, 2.2.14,
2.2.5 patch for DAC960)
8x 50Gb Seagate Barracuda (7200 RPM), 4 on each channel.
Filesystem made with mke2fs -b 4096 -i 16384 -m1 -R stride=16
Now, I'm very happy with my results, they're beyond anything I've
gotten before, but isn't it weird that it writes faster than it reads with
many threads? Also, should I test with the -W option, will Linux
write like this when using it as a NFS/Samba only? Here are the
Tiotest (latest) results:
Threads: 1
BlockSize: 4096
FileSizeInMBytes: 200
Directory: .
SeeksPerThread: 1000
Tiotest results for 1 concurrent io threads:
---------------------------------------------------------------------- Item
|
Time | Rate | User CPU | System CPU ------------------+------
200 MBs write | 3.3 s | 59.954 MB/s | 2.1 % | 50.1 %
200 MBs read | 1.8 s | 110.835 MB/s | 1.7 % | 89.2 %
1000 Seeks | 0.0 s | 28688.6 s/s | 0.0 % | 114.8 % --------
--------------------------------------------------------------
***********************************
Threads: 8
BlockSize: 4096
FileSizeInMBytes: 200
Directory: .
SeeksPerThread: 1000
Tiotest results for 8 concurrent io threads:
----------------------------------------------------------------------
Item | Time | Rate | User CPU | System CPU
------------------+-----------+--------------+-----------+------------
1600 MBs write | 30.8 s | 51.937 MB/s | 1.6 % | 42.3 %
1600 MBs read | 40.7 s | 39.338 MB/s | 0.4 % | 17.9 %
8000 Seeks | 9.1 s | 882.0 s/s | 0.2 % | 2.3 %
----------------------------------------------------------------------
***********************************
Threads: 2
BlockSize: 4096
FileSizeInMBytes: 1024
Directory: .
SeeksPerThread: 1000
Tiotest results for 2 concurrent io threads:
----------------------------------------------------------------------
Item | Time | Rate | User CPU | System CPU
------------------+-----------+--------------+-----------+------------
2048 MBs write | 33.5 s | 61.075 MB/s | 1.6 % | 51.9 %
2048 MBs read | 55.8 s | 36.722 MB/s | 0.4 % | 14.8 %
2000 Seeks | 7.6 s | 264.4 s/s | 0.0 % | 0.5 % -----------
-----------------------------------------------------------
