Serial ATA: SiI3112 numbers, Linux-Raid 1

[Andre Hedrick]

Just for kicks!

[root@athy tiobench-0.3.2]# ./tiobench.pl
No size specified, using 512 MB
Size is MB, BlkSz is Bytes, Read, Write, and Seeks are MB/sec

         File   Block  Num  Seq Read    Rand Read   Seq Write  Rand Write
  Dir    Size   Size   Thr Rate (CPU%) Rate (CPU%) Rate (CPU%) Rate (CPU%)
------- ------ ------- --- ----------- ----------- ----------- -----------
   .     512    4096    1  38.60 20.2% 0.844 0.97% 32.85 34.4% 1.090 0.90%
   .     512    4096    2  26.20 16.6% 0.973 1.05% 28.52 47.5% 1.099 0.98%
   .     512    4096    4  22.98 15.6% 1.070 1.07% 24.53 45.0% 1.098 1.26%
   .     512    4096    8  21.52 15.9% 1.168 1.06% 20.27 39.1% 1.097 1.52%

[root@athy /]# bonnie -s 512
File './Bonnie.19851', size: 536870912, volumes: 1
Writing with putc()...  done:  13038 kB/s  99.8 %CPU
Rewriting...            done:  15274 kB/s  12.9 %CPU
Writing intelligently...done:  44931 kB/s  43.8 %CPU
Reading with getc()...  done:  12038 kB/s  95.0 %CPU
Reading intelligently...done:  66362 kB/s  32.5 %CPU
Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done...
            ---Sequential Output (nosync)--- ---Sequential Input-- --Rnd Seek-
            -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --04k (03)-
Machine  MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU   /sec %CPU
     1* 512 13038 99.8 44931 43.8 15274 12.9 12038 95.0 66362 32.5  305.7  4.1

[root@athy /]# bonnie -s 1024
File './Bonnie.19858', size: 1073741824, volumes: 1
Writing with putc()...  done:  13023 kB/s 100.0 %CPU
Rewriting...            done:  15114 kB/s  13.9 %CPU
Writing intelligently...done:  39051 kB/s  40.2 %CPU
Reading with getc()...  done:  12158 kB/s  96.3 %CPU
Reading intelligently...done:  53235 kB/s  28.3 %CPU
Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done...
            ---Sequential Output (nosync)--- ---Sequential Input-- --Rnd Seek-
            -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --04k (03)-
Machine  MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU   /sec %CPU
     1*1024 13023 100.0 39051 40.2 15114 13.9 12158 96.3 53235 28.3  210.7  2.1

Cheers,

Andre Hedrick
LAD Storage Consulting Group