On 28-Mar-2011, at 05:37, Eugene wrote: > On Sun, Mar 27, 2011 at 01:59:49PM CDT, George N. White III > <[email protected]> wrote: >> >> Server vs a workstation can require very different >> configuration/tuning. I encountered (reproducible) file system >> corruption doing large parallel compiles using regular Mac OS X >> Leopard and was told by Apple Support that such usage was not >> supported in regular Mac OS X, and that Mac OS X Server must be used >> for such workloads. I assume filesystems use different tuning on >> regular and server configurations. Some of my benchmarks show better >> performance for I/O intensive workloads on a MacBook Pro SL than on a >> Mac Pro Server (Leopard). Maybe there are improvements for Lion >> and/or the disk hardware that negate the need for different tuning. >> Certainly with linux one can get large differences in performance on >> certain workloads by adjusting the filesystem tuning or using a >> different filesystem entirely. > > This would not surprise me with OS X. Years ago, I read that > the kernel itself is different between client and server. IIRC, > the main difference is that server is designed for more equal > preemptive multitasking between daemons and such, while client > may prioritize users' main apps over other less-used processes. > Can't find the source, but I wouldn't mind the reading material > if someone has a link.
Don't have a link, but that is certainly my impression in running OSX Server. Multiple tasks all seem to keep running, which means that foreground GUI tasks can sometimes take longer. The only exception seems to be that disk IO can still throttle the entire computer. So, if I am downloading something and the speed is reasonably fast (over 750KB/s say) then I notice that the rest of the system is lagging. However, rsync doesn't present that problem to me, so I'm not sure what it is, exactly. -- Don't be too sure I'm as crooked as I'm supposed to be. ~ Sam Spade _______________________________________________ MacOSX-talk mailing list [email protected] http://www.omnigroup.com/mailman/listinfo/macosx-talk
