On 08/09/2010 12:36 PM, Patrick O'Callaghan wrote: > I've been copying some large (several GB) files from my local system to > a NAS server on my LAN, using NFS. > > The local files are on an external USB drive (Iomega 500GB unit) on a > USB 2 port. The NAS server is also Iomega, an ix-200. The network switch > is a Belkin Wireless G with 100Mbps Ethernet ports (I'm not using Wifi > for this). I'm not using jumbo frames or anything fancy, in fact I don't > think the Belkin supports them. The system is an Intel Core 2 Duo mobo > with 4GB RAM running F13 fully updated. > > I'm using KDE 4.4.5. When I do one of these copies (using cp from a > terminal), my entire system becomes unresponsive for periods of about 1 > minute, then becomes usable for maybe 10 seconds, freezes again for > another minute etc. etc. until the copy finishes. "Unresponsive" means > the mouse cursor won't move, button clicks aren't attended to and I > can't type in Konsole or in the Evolution mail composer. > > Copying the same files to a local SATA disk doesn't cause this > phenomenon, so it can't just be the external drive. OTOH, I use the same > NAS for regular rsync-based backups *to the same NFS-mounted NAS* and > the load is not noticeable. > > Any thoughts on this would be welcome. > > poc Usually you see this kind of problem when your HDD is thrashing. Try running your copy command with ionice: ionice -c3 <command> Other things to check: * run top in a separate window before you run the freezing command -- see what it says when it works * see if tty sessions in Ctrl+Alt+F2..F6 respond any better than the UI -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
