From: Nikola Ciprich <extmaillist@linuxbox.cz>
To: Stefan Hajnoczi <stefanha@gmail.com>
Cc: KVM list <kvm@vger.kernel.org>, nikola.ciprich@linuxbox.cz
Subject: Re: qemu-kvm-0.13.0 - winsows 2008 - chkdisk too slow
Date: Thu, 6 Jan 2011 10:06:34 +0100 [thread overview]
Message-ID: <20110106090634.GC17772@pcnci.linuxbox.cz> (raw)
In-Reply-To: <AANLkTi=SLn71YyXL-K5g03da6hWycVZOJbLZj5A_uCnQ@mail.gmail.com>
Hello Stefan!
> Please post your KVM command-line.
/usr/bin/qemu-kvm -S -M pc-0.13 -enable-kvm -m 4096 -smp 2,sockets=2,cores=1,threads=1 -name vmwts02 -uuid 1e501300-dc48-11df-a690-00304834195b -nodefconfig -nodefaults -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/vmwts02.monitor,server,nowait -mon chardev=monitor,mode=readline -rtc base=localtime -boot c -drive file=/dev/vgshared/vmwts02-1,if=none,id=drive-ide0-0-0,format=raw -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -drive if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -netdev tap,fd=22,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=00:16:3e:61:01:00,bus=pci.0,addr=0x3 -usb -vnc 0.0.0.0:30801 -vga cirrus -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4
I see I could disable cache for storage, but I don't want to kill
fsck now just to test if it helps (and I guess it shouldn't make
such a difference).
> Have you run storage benchmarks on the host to check what sort of
> maximum I/O performance you can expect? Do you have a RAID setup
> underneath LVM?
Not for windows, but in general it is running quite fast, only the chkdsk
seems to be bad. In other VMs (linux), I'm achieving write speeds >40MB/s.
Storage configuration is a bit comples, it's DRBD replicated storage,
on top of it sits clustered LVM and KVMS use logical volumes on top of it.
but as I said, overall performance is OK.
>
> Stefan
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next prev parent reply other threads:[~2011-01-06 9:08 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-06 7:48 qemu-kvm-0.13.0 - winsows 2008 - chkdisk too slow Nikola Ciprich
2011-01-06 9:03 ` Stefan Hajnoczi
2011-01-06 9:06 ` Nikola Ciprich [this message]
2011-01-06 9:08 ` Avi Kivity
2011-01-06 9:20 ` Nikola Ciprich
2011-01-06 9:27 ` Avi Kivity
2011-01-06 9:30 ` Avi Kivity
2011-01-06 9:42 ` Nikola Ciprich
2011-01-06 10:19 ` Avi Kivity
2011-01-06 10:25 ` Nikola Ciprich
2011-01-06 10:50 ` Avi Kivity
2011-01-06 11:06 ` Daniel P. Berrange
2011-01-06 12:19 ` Nikola Ciprich
2011-01-06 12:18 ` Nikola Ciprich
2011-01-06 13:26 ` Avi Kivity
2011-01-06 13:55 ` Nikola Ciprich
2011-01-06 14:37 ` Avi Kivity
2011-01-06 15:38 ` Nikola Ciprich
2011-01-09 12:36 ` Nikola Ciprich
2011-01-09 12:39 ` Avi Kivity
2011-01-09 13:36 ` Nikola Ciprich
2011-01-09 13:44 ` Nikola Ciprich
2011-01-09 14:13 ` Avi Kivity
2011-01-09 14:13 ` Avi Kivity
2011-01-09 14:27 ` Nikola Ciprich
2011-01-09 14:36 ` Avi Kivity
2011-01-09 15:15 ` Nikola Ciprich
2011-01-09 20:10 ` Nikola Ciprich
2011-01-10 9:23 ` Avi Kivity
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