[Lustre-discuss] [Lustre-Performance] Lustre performance on SLES 11 x86-64

[Mag Gam]

Check the network connections.


What kind of network are you on? 10/100 or 100/1000? Do you see any
dropped packets?



On Fri, Oct 30, 2009 at 7:49 AM, udara weerapperuma <udaraslt at gmail.com> wrote:
>
> Hi All,
>
>
> I have SLES 11 x86-64  and lustre v 1.8.1.1 installed in it. This use as MDS
> and OSS.
>
> /dev/sda3 ----2 GB------ MDT
> /dev/sdb2 ----5 GB------ OST1
> /dev/sdb3 ----5 GB------ OST2
> /dev/sdb5 ----5 GB------ OST3
> /dev/sdb6 ----5 GB------ OST4
>
> Then I have 2 clients running on SLES 11 x86-64 and SLES 10 SP2 x86-64 both
> has the lustre v 1.8.1.1 installed.
> The SLES 10 client gives the same speed for every bs value in dd command (dd
> if=/dev/zero of=/lustre/sles10.out bs=1k gives 43 MB/s)
> This is same for the every bs value on SLES 10 SP2.
>
> But for the SLES 11 x86-64 client gives only 4 MB/s speed for the small bs
> values. (bs=1k )
> It gives 45 MB/s for the bs=32k values and up.
>
> I have attached some outputs from the llstat command on both the clients.
>
> Please give me a solution to tune SLES 11 x86-64 server to get 40 MB/s speed
> under bs=1k situvation.
> tnx,
> Udara
>
>
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