Götz Reinicke wrote:
I am using software RAID 10 with CentOS 5.3 and I surely did see a *huge* performance increase with RAID 10 compared to RAID 1 only.
I tested 1+0 vers 0+1 vers 5 on the 3ware, the sun build in raid system and using softwareraid on an other (older) server.
On the iscsi systems and the 3ware controller I tested raid 5 vers. 6 as well.
May be I should have mentioned that.
My conclusion on my systems was:
Level 5 is the best concerning performance/capacity.
That's very strange, considering what the drives physically have to do for raid 5, especially on small writes. Did you have a very large number of drives in the array?