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

[Dave Walker]

Re-introducing qemu-kvm, as commentary on qemu-devel mailing list
suggest there could be a timing concern meaning poor performance.
Leaving Libvirt on this report, as upstream libvirt have quoted improved
performance adjusting the block size for dd.  However, Qemu feel that
the real issue is in the qemu/kvm code.

Thanks.

** Also affects: qemu-kvm (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: qemu-kvm (Ubuntu)
       Status: New => Confirmed

** Changed in: qemu-kvm (Ubuntu)
   Importance: Undecided => Wishlist

-- 
virsh save is very slow
https://bugs.launchpad.net/bugs/524447
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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.