[lustre-discuss] DOM Configuration

[Hans Henrik Happe]

Hi Francisco,

Just to make sure. You are aware that it will only work for new 
files/dirs under "/folder_name/"? Also, only small files or the first 
part of a large file (<32M) will get a performance benefit.

Cheers,
Hans Henrik


On 30.09.2022 14.16, Cloete, F. (Francois) via lustre-discuss wrote:
>
> Good day Lustre Community.
>
> Would appreciate any guidance regarding best practices on the below 
> DOM Lustre config in our environment.
>
> We have applied DOM on our Application file-systems thinking that this 
> would give us a performance benefit in our environment.
>
> We have not noticed any significant performance benefit after applying 
> these changes.
>
> Below is the setstripe command used for the folders mentioned above.
>
> /lfs setstripe -E 32M -L mdt -E -1 -S 4M folder_name/
>
> //
>
> /Below are the versions we are using./
>
> /[root at server1 ~]# rpm -qa|grep -i lustre/
>
> /kmod-lustre-osd-ldiskfs-2.12.8_6_g5457c37-1.el7.x86_64/
>
> /kernel-3.10.0-1160.49.1.el7_lustre.x86_64/
>
> /kernel-headers-3.10.0-1160.49.1.el7_lustre.x86_64/
>
> /lustre-tests-2.12.8_6_g5457c37-1.el7.x86_64/
>
> /lustre-osd-ldiskfs-mount-2.12.8_6_g5457c37-1.el7.x86_64/
>
> /lustre-iokit-2.12.8_6_g5457c37-1.el7.x86_64/
>
> /lustre-resource-agents-2.12.8_6_g5457c37-1.el7.x86_64/
>
> /kmod-lustre-2.12.8_6_g5457c37-1.el7.x86_64/
>
> /kmod-lustre-tests-2.12.8_6_g5457c37-1.el7.x86_64/
>
> /lustre-2.12.8_6_g5457c37-1.el7.x86_64/
>
> //
>
> //
>
> /[root at server ~]# cat /etc/*release*/
>
> /NAME="Red Hat Enterprise Linux Server"/
>
> /VERSION="7.9 (Maipo)"/
>
> /ID="rhel"/
>
> /ID_LIKE="fedora"/
>
> /VARIANT="Server"/
>
> /VARIANT_ID="server"/
>
> /VERSION_ID="7.9"/
>
> /PRETTY_NAME="Red Hat Enterprise Linux"/
>
> /ANSI_COLOR="0;31"/
>
> /CPE_NAME="cpe:/o:redhat:enterprise_linux:7.9:GA:server"/
>
> /HOME_URL=https://www.redhat.com//
>
> /BUG_REPORT_URL=https://bugzilla.redhat.com//
>
> //
>
> /REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 7"/
>
> /REDHAT_BUGZILLA_PRODUCT_VERSION=7.9/
>
> /REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux"/
>
> /REDHAT_SUPPORT_PRODUCT_VERSION="7.9"/
>
> /Red Hat Enterprise Linux Server release 7.9 (Maipo)/
>
> /Red Hat Enterprise Linux Server release 7.9 (Maipo)/
>
> /cpe:/o:redhat:enterprise_linux:7.9:ga:server/
>
> //
>
> /We are using ldiskfs on rhel7.9 VM’s in azure./
>
> Thanks
>
> Francois
>
>
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