Cosmin Prund wrote: > On: Friday, March 07, 2008 8:06 PM > Arno Garrels wrote:
> About HDD: VmWare's HDD and Network drivers are very effective, you're > not losing too much performance by keeping your Virtual Machine images > on "ordinary" HDD's. I forgot to mention that I always turn off write ahead cache on the drive that holds the system partition. That's most likely why it was so much faster here when the VM files were on an extra drive. However I'm rather unsure what will happen to the VM-Image files on power loss when write cache is turned on at the host, I also don't know whether turning it off in the guest OS would prevent the image from corruption. > About performance: How did you measure the performance, and did you > use a "dual CPU" virtual machine? My VMs have just one CPU and I tested on an XP-Pro 32 bits host. I copied a big file from one virtual drive to another as well and also used HD-Tune to messure drive speeds. Also converted a real to a virtual machine and compared startup times of the same Delphi installation with plenty of third party components installed. I noticed an average performance loss of roughly 20%, if that is not the correct value, that's at least roughly the feeled loss. Formating a bigger cluster size may speed up things on Windows NTFS, I used 4 KB clusters since the Linux ntfs3-org driver does not seem to benefit from higher values. -- Arno Garrels _______________________________________________ Delphi mailing list -> Delphi@elists.org http://lists.elists.org/cgi-bin/mailman/listinfo/delphi
