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</o:shapelayout></xml><![endif]--></head><body lang=CS link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Hello everybody,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I have a problem here, I can’t move with. My Windows server runs as virtual machine under KVM. I’m using a 10GB network card. On this hw configuration I expect much better performance than I’m getting. Two less important disks uses KVM cache, that improve performance a bit. But I don’t want to use KVM‘s cache for system and databases disks and there I’m getting 6MB/s for writing. Also 4K writing is low even with KVM cache.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US>This is a pool disk configuration.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US>pool: dpool<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> state: ONLINE<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> scan: scrub repaired 0 in 14h11m with 0 errors on Thu Aug 13 14:34:21 2015<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>config:<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US> NAME STATE READ WRITE CKSUM CAP Product /napp-it IOstat mess<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> dpool ONLINE 0 0 0<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> mirror-0 ONLINE 0 0 0<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> c1t50014EE00400FA16d0 ONLINE 0 0 0 1 TB WDC WD1002F9YZ-0 S:0 H:0 T:0<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> c1t50014EE2B40F14DBd0 ONLINE 0 0 0 1 TB WDC WD1003FBYX-0 S:0 H:0 T:0<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> mirror-1 ONLINE 0 0 0<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> c1t50014EE05950B131d0 ONLINE 0 0 0 1 TB WDC WD1002F9YZ-0 S:0 H:0 T:0<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> c1t50014EE2B5E5A6B8d0 ONLINE 0 0 0 1 TB WDC WD1003FBYZ-0 S:0 H:0 T:0<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> mirror-2 ONLINE 0 0 0<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> c1t50014EE05958C51Bd0 ONLINE 0 0 0 1 TB WDC WD1002F9YZ-0 S:0 H:0 T:0<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> c1t50014EE0595617ACd0 ONLINE 0 0 0 1 TB WDC WD1002F9YZ-0 S:0 H:0 T:0<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> mirror-3 ONLINE 0 0 0<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> c1t50014EE0AEAE7540d0 ONLINE 0 0 0 1 TB WDC WD1002F9YZ-0 S:0 H:0 T:0<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> c1t50014EE0AEAE9B65d0 ONLINE 0 0 0 1 TB WDC WD1002F9YZ-0 S:0 H:0 T:0<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> logs<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> mirror-4 ONLINE 0 0 0<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> c1t55CD2E404B88ABE1d0 ONLINE 0 0 0 120 GB INTEL SSDSC2BW12 S:0 H:0 T:0<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> c1t55CD2E404B88E4CFd0 ONLINE 0 0 0 120 GB INTEL SSDSC2BW12 S:0 H:0 T:0<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> cache<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> c1t55CD2E4000339A59d0 ONLINE 0 0 0 180 GB INTEL SSDSC2BW18 S:0 H:0 T:0<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US>errors: No known data errors<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Any advice for performance improvement appreciated.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Martin Truhlar</span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>