Tuning VM Disk Performance - Heiko's Blog - VFIO passthrough
Qemu/kvm provides you with a plethora of ways to configure your storage devices. Yet no other type of device shows such a variance in its performance, with disk I/O throughput anywhere from stellar to abysmal using the very same hardware. In this post I like to show some configuration options that can help improve VM disk performance. For an in-depth presentation on the latest developments and fea
KVMを使う（ディスク性能編その2）
hdparmを使ったread性能の測定 KVMではブートディスクの他に3つのディスクをアタッチできますから、3つのキャッシュモードをそれぞれ指定したイメージファイルをアタッチしてやることにします。 host# qemu-system-x86_64 -hda vm01.img \ -drive index=1,media=disk,cache=writethrough,file=raw1.img \ -drive index=2,media=disk,cache=writeback,file=raw2.img \ -drive index=3,media=disk,cache=none,file=raw3.img \ ... これでゲストOSからは、/dev/sdb = writethrough、/dev/sdc = writeback、/dev/sdd = noneのモードで利用できるよう
Tuning KVM - KVM
CPU Performance Modern processors come with a wide variety of performance enhancing features such as streaming instructions sets (sse) and other performance-enhancing instructions. These features vary from processor to processor. QEMU and KVM default to a compatible subset of cpu features, so that if you change your host processor, or perform a live migration, the guest will see its cpu features u
KVM - Debian Wiki
Introduction The Kernel Virtual Machine, or KVM, is a full virtualization solution for Linux on x86 (64-bit included) and ARM hardware containing virtualization extensions (Intel VT or AMD-V). It consists of a loadable kernel module, kvm.ko, which provides the core virtualization infrastructure and a processor specific module, kvm-intel.ko or kvm-amd.ko. In Debian, Xen is an alternative to KVM. (V
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https://www.lfasiallc.com/wp-content/uploads/2017/11/Storage-Performance-Tuning-for-FAST-Virtual-Machines_Fam-Zheng.pdf
https://support.hpe.com/hpsc/doc/public/display?docId=c02891917