Re: [Qemu-devel] [Bug 524447] Re: virsh save is very slow

[Nikola Ciprich <extmaillist@linuxbox.cz>]

Hi, just wanted to report, I just tried libvirt-0.8.2 which should use larger dd blocksize.
save is still painfully slow, about 1MB/s while host is totally
idle...
regards
nik


On Tue, Jun 22, 2010 at 07:02:08PM -0000, Serge Hallyn wrote:
> Just a note that the 0.8.1 release available in maverick gives me about
> a 50-second save for a 512M memory image (producing 100M outfile).  The
> patch listed above and suspected of speeding the saves is not in 0.8.1.
> When I hand-apply just that patch, saves take about 8 seconds, but
> restore fails.  Presumably taking the whole of latest git (or 0.8.2
> whenever it is released) will result in both working and fast
> save/restore.
> 
> -- 
> virsh save is very slow
> https://bugs.launchpad.net/bugs/524447
> You received this bug notification because you are a member of qemu-
> devel-ml, which is subscribed to QEMU.
> 
> Status in libvirt virtualization API: Unknown
> Status in QEMU: Invalid
> Status in “libvirt” package in Ubuntu: Confirmed
> Status in “qemu-kvm” package in Ubuntu: Confirmed
> 
> Bug description:
> As reported here: http://www.redhat.com/archives/libvir-list/2009-December/msg00203.html
> 
> "virsh save" is very slow - it writes the image at around 1MB/sec on my test system.
> 
> (I think I saw a bug report for this issue on Fedora's bugzilla, but I can't find it now...)
> 
> Confirmed under Karmic.
> 
> 
> 
> 

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