Hi Mirko, On Tue, Jan 02, 2007 at 08:42:34AM +0100, Mirko Benz wrote:
> Please provide more details regarding the HW setup (e.g. disk drive > model and number of drives used, what kind of storage interface was > used, RAID configuration). I could not find it in the file. The disks are 10x ST350064 in an 8+2 configuration. The storage interface was 4 Gbit FC. No Special RAID configuration except a block size of 4096 (which we recommend for all DDN+Lustre installations.) Cheers, Jody > > Thanks, > Mirko > > Jody McIntyre schrieb: > >Hi all, > > > >Here is a completely new set of sgpdd-survey results from a DDN S2A > >9550. After much investigation, it seems there were several problems > >with the surveys I posted earlier, mainly a minor hardware issue (which > >DDN spotted and fixed almost immediately) and a misconfiguration of > >sgpdd-survey itself (which we will address in a future release of the > >tool.) I also no longer have access to the hardware used for the first > >set of surevys, so I discarded all these results and started again. > > > >You can see that with the right settings (4 MB IOs, no prefetch, > >maxcmds=16, and sgpdd-survey using the correct block size of 4096), read > >performance now "plateaus" nicely as with an S2A 8500. However, it does > >so at a relatively low number for region counts above 16. I expect we > >can improve these numbers even furthur and will work with DDN on this, > >so don't take these graphs as "final" in any way. > > > >Thanks to Oak Ridge National Laboratory for access to the system used to > >perform the first set of surveys, to Indiana University for access to > >the system used for this set of surveys, and to DDN for their help so > >far in tuning the systems. > > > >Cheers, > >Jody > > > >------------------------------------------------------------------------ > > > >_______________________________________________ > >Lustre-devel mailing list > >[email protected] > >https://mail.clusterfs.com/mailman/listinfo/lustre-devel > > -- _______________________________________________ Lustre-devel mailing list [email protected] https://mail.clusterfs.com/mailman/listinfo/lustre-devel
