Just out of curiosity how much is recommended to run a MDS on a virtual machine (oVirt) ? Are there any performance comparison/testing available ? thanks
On 9/28/17 9:49 AM, Dilger, Andreas wrote: > On Sep 28, 2017, at 04:54, forrest.wc.l...@dell.com wrote: >> Hello : >> >> Our customer is going to configure Lustre FS, which will have a lot of small >> files to be accessed. >> >> We are to configure 1TB Memory for MDS. >> >> Regarding to CPU configuration , can we propose E5-2667 or E5-2697A for MDS >> for good performance ? >> >> E5-2667 v4 : 3.2GHz, 8 Cores >> E5-2697A v4: 2.6GHz, 16 cores > There is a good presentation showing CPU speed vs. cores vs. MDS performance: > > https://www.eofs.eu/_media/events/lad14/03_shuichi_ihara_lustre_metadata_lad14.pdf > > Normally, higher GHz is good for the MDS, but if it reduces the number of > cores by half, it may not be worthwhile. It also depends on whether your > workloads are mostly parallel (in which case more cores * GHz is better), > or more serial (in which case a higher GHz is better). > > In this case, cores * GHz is 3.2GHz * 8 = 25.6GHz, and 2.6GHz * 16 = 41.6GHz, > so you would probably get better aggregate performance from the E5-2697A as > long as you have sufficient client parallelism to drive the system heavily. > > Cheers, Andreas > -- > Andreas Dilger > Lustre Principal Architect > Intel Corporation > > > > > > > > _______________________________________________ > lustre-discuss mailing list > lustre-discuss@lists.lustre.org > http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org _______________________________________________ lustre-discuss mailing list lustre-discuss@lists.lustre.org http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org