Hi Charles It really does not show below which layout you use for RAID10. This is quite important as the different layouts of RAID10 have quite different performance characteristics. The 'far' layout tends to be the fastest. Which command did you use to create the RAID10 array? best regards Keld On Tue, Jan 15, 2013 at 08:43:35PM -0800, Charles Polisher wrote: > keld@xxxxxxxxxx wrote: > > > Advantage Advantage > > > vs 4 drives vs RAID0 > > > Config Drives Seq write Seq read Write Read Write Read > > > ------ ------ ---------- ---------- ----- ----- ---- ---- > > > RAID0 4 8.1MB/sec 9.3MB/sec 1.00 1.00 1.00 1.00 > > > RAID0 8 16.8MB/sec 15.0MB/sec 2.07 1.61 1.00 1.00 > > > > > > RAID1 4 2.1MB/sec 3.6MB/sec 1.00 1.00 0.25 0.38 > > > RAID1 8 1.6MB/sec 3.6MB/sec 0.76 1.00 0.09 0.24 > > > > > > RAID5 4 16.8MB/sec 9.1MB/sec 1.00 1.00 2.07 0.97 > > > RAID5 8 17.2MB/sec 14.9MB/sec 1.02 1.63 2.12 1.60 > > > > > > RAID6 4 12.6MB/sec 7.9MB/sec 1.00 1.00 1.55 0.84 > > > RAID6 8 14.4MB/sec 14.5MB/sec 1.63 1.83 1.77 1.55 > > > > > > RAID10 4 4.0MB/sec 7.3MB/sec 1.00 1.00 0.49 0.78 > > > RAID10 8 6.3MB/sec 13.4MB/sec 1.57 1.83 0.37 0.89 > > > > > What layout are you using for RAID10? > > Is it Linux MD RAID10? > > # cat /proc/mdstat > Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] > md1 : active raid10 sdi[7] sdh[6] sdg[5] sdf[4] sde[3] sdd[2] sdc[1] sdb[0] > 2118656 blocks 64K chunks 2 near-copies [8/8] [UUUUUUUU] > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
