Hi, I wonder if there is anyone out there who has a working test or even production environment using Lustre for VM disk images?
I run into the Lustre Direct I/O problematic which requires the application to read and write in 4K I/O chunks. qemu/kvm uses 512 byte as I/O size and refuses to start the VM. In this case cache is "none". If I change the cache mode to writethrough (default) then the VM stored on Lustre can be started, but it has very poor write performance. (100-times worse) Any hints? Best regards, Danny _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
