Tests are done across four 7200RPM SATAII drives on a PCI-X card sitting on a PCI (32-bit, 133MB/sec theoretical max) bus, probably the slowest bus configuration possible, and then again after being moved to a motherboard with dual PCI-X slots. Server is running Ubuntu 9.10 AMD64 Server.
Benchmark is a simple ‘dd’ sequential read and write.
write: dd if=/dev/zero of=/dev/md2 bs=1M
read: dd if=/dev/md2 of=/dev/null bs=1M
mdadm –create /dev/md2 –verbose –level=10 –layout=n2 –raid-devices=4 /dev/sd[ftlm]1
|write:||13.2 MB/s||144 MB/s|
|read:||4.0 MB/s||89.3 MB/s|
mdadm –create /dev/md2 –verbose –level=10 –layout=f2 –raid-devices=4 /dev/sd[ftlm]1
|write:||48.3 MB/s||131 MB/s|
|read:||92.7 MB/s||138 MB/s|
mdadm –create /dev/md2 –verbose –level=10 –layout=o2 –raid-devices=4 /dev/sd[ftlm]1
|write:||47.4 MB/s||135 MB/s|
|read:||98.7 MB/s||142 MB/s|
And more comparisons:
write: 38.9 MB/s
read: 64.8 MB/s
Single Disk (PCI)
write: 59.4 MB/s
read: 71.9 MB/s
One Reply to “Linux Software RAID10 Benchmarks”
Hello, was this done on a router running DD-WRT?
please see / weigh-in to this thread if you can spare a minute: http://www.dd-wrt.com/phpBB2/viewtopic.php?p=477269
I am curious if I am about to start down a dead-end path.. and your experience as demonstrated on this post may help us determine one way or the other.
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