Messages in this thread | | | Date | Wed, 28 May 2008 07:05:02 -0400 (EDT) | From | Justin Piszcz <> | Subject | Re: Performance Characteristics of All Linux RAIDs (mdadm/bonnie++) |
| |
On Wed, 28 May 2008, Peter Rabbitson wrote:
> Justin Piszcz wrote: >> Hardware: >> >> 1. Utilized (6) 400 gigabyte sata hard drives. >> 2. Everything is on PCI-e (965 chipset & a 2port sata card) >> >> Used the following 'optimizations' for all tests. >> >> # Set read-ahead. >> echo "Setting read-ahead to 64 MiB for /dev/md3" >> blockdev --setra 65536 /dev/md3 > > That's actually 65k x 512byte blocks so 32MiB Ah whoops, thanks!
> Results are meaningless without a crucial detail - what was the chunk size > used during array creation time? Otherwise interesting test :) Indeed, the chunk size used was 256 KiB for all tests.
Justin.
| |