Hi
im using vmware server in centOS dedicated Server

which one its better for:
more speed
more performance

when i create " virtual DISK " for vm ,i see this option

Allocate all disk space nowsome people say if checked ( select) Allocate all disk space now option
its better for server and more perforamnce

its right?

Yes, you have heard right that selecting the option Allocate all disk space now option will enhances the server performance.