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 <[email protected]> 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 > > > _______________________________________________ > Lustre-discuss mailing list > [email protected] > http://lists.lustre.org/mailman/listinfo/lustre-discuss > > _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
