jvalidolnx@juanyjosefina.com wrote:

I was very impressed with the performance I got on CentOS 5.6 using software Raid 10 so I'm looking. Thanks

There are 3 ways to setup RAID 10 on Linux (mdadm). There are -n2 -f2 and -o2 options (near, far and offset) and best for ordinary use is far (f2).

Here is some numbers from: http://blog.jamponi.net/2007/12/some-raid10-performance-numbers.html

# the kernel is 2.6.22.12, openSUSE "default" kernel # the CPU is an AMD x86-64, x2 3600+ in power-saving mode (1000 MHz) # the MB is an EPoX MF570SLI which uses the nVidia MCP55 SATA (PCIe) # the drives are 3 different makes of SATA II, 7200 rpm # each drive is capable of not more than 75 MiB/s (at best - the outermost tracks) and closer to 70 MiB/s the

In MiB/s level format Writing Reading Writing Reading (Degraded)(Degraded) raid5 left-asymmetric 55 129 46 124 raid5 left-symmetric 54 123 50 122 raid5 right-asymmetric 54 124 49 124 raid5 right-symmetric 54 128 49 116 raid10 n2 103 95 103 104 raid10 o2 102 94 100 102 raid10 f2 97 162 97 51 raid0 - 205 186 n/a n/a

Or in indexes: level format Writing Reading Writing Reading (Degraded)(Degraded) raid5 left-asymmetric 0.8 1.8 0.7 1.8 raid5 left-symmetric 0.8 1.8 0.7 1.7 raid5 right-asymmetric 0.8 1.8 0.7 1.8 raid5 right-symmetric 0.8 1.8 0.7 1.7 raid10 n2 1.5 1.4 1.4 1.4 raid10 o2 1.5 1.4 1.4 1.4 raid10 f2 1.4 2.3 1.4 0.7 raid0 - 3.0 2.8 n/a n/a

Ljubomir