On Thu, 9 Mar 2000, Kent Nilsen wrote:
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
You didn't say which RAID level you were using.
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?
some of those figures are a bit off, esp the first few cause the
filesize used is much less than RAM so you'd be testing RAM more than
disk.
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 % -----------
-----------------------------------------------------------
--
Paul Jakma [EMAIL PROTECTED]
PGP5 key: http://www.clubi.ie/jakma/publickey.txt
-------------------------------------------
Fortune:
Not only is UNIX dead, it's starting to smell really bad.
-- Rob Pike
