lkml.org 
[lkml]   [2008]   [May]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: 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.



    \
     
     \ /
      Last update: 2008-05-28 13:07    [W:3.139 / U:2.116 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site