Hello I have Xen related issues. I try to describe it as best as I can. While transmitting large amounts of data from domU the IO load increases greatly, thus making the domU unusable. The load is significant even on dom0. The performance of cpus and hard drives is not an issue. We have this problem on all servers with diferent hw configurations. Please do you know the reason of this behaviour, do you have any experience whith such problems? -- S pozdravem Tadeas Mengler Senior Linux System Administrator tadeas.mengler at miton.cz 483 367 866, 608 264 866 MITON CZ, s.r.o. | www.miton.cz Jiraskova 9, 466 01 Jablonec nad Nisou Tel.: 483 367 800, fax: 483 710 884 www.stahuj.cz | www.stable.cz | www.otoman.cz | www.vareni.cz