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Re: [Qemu-devel] [Libguestfs] How to emulate block I/O timeout on qemu s
From: |
Richard W.M. Jones |
Subject: |
Re: [Qemu-devel] [Libguestfs] How to emulate block I/O timeout on qemu side? |
Date: |
Tue, 6 Nov 2018 09:14:57 +0000 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Tue, Nov 06, 2018 at 02:17:46PM +0800, Dongli Zhang wrote:
> On 11/06/2018 01:49 AM, Eric Blake wrote:
> > On 11/2/18 3:11 AM, Dongli Zhang wrote:
> >> Hi,
> >>
> >> Is there any way to emulate I/O timeout on qemu side (not fault
> >> injection in VM kernel) without modifying qemu source code?
> >
> > You may be interested in Rich's work on nbdkit. If you don't mind
> > the overhead of the host connecting through NBD, then you can use
> > nbdkit's delay and fault-injection filters for inserting delays or
> > even run-time-controllable failures to investigate how the guest
> > reacts to those situations
> >
> Thank you all very much for the suggestions. I will take a look on nbdkit.
These links should help:
https://rwmj.wordpress.com/2018/09/04/nbdkit-for-loopback-pt-2-injecting-errors/
https://rwmj.wordpress.com/2018/09/06/nbdkit-for-loopback-pt-7-a-slow-disk/
This link shows how to combine delay and error filters together:
https://rwmj.wordpress.com/2018/11/04/nbd-graphical-viewer/
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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- Re: [Qemu-devel] How to emulate block I/O timeout on qemu side?, (continued)
- Re: [Qemu-devel] How to emulate block I/O timeout on qemu side?, Marc Olson, 2018/11/02
- Re: [Qemu-devel] How to emulate block I/O timeout on qemu side?, John Snow, 2018/11/02
- Re: [Qemu-devel] How to emulate block I/O timeout on qemu side?, Dongli Zhang, 2018/11/03
- Re: [Qemu-devel] How to emulate block I/O timeout on qemu side?, John Snow, 2018/11/05
- Re: [Qemu-devel] How to emulate block I/O timeout on qemu side?, Marc Olson, 2018/11/12
- Re: [Qemu-devel] How to emulate block I/O timeout on qemu side?, Dongli Zhang, 2018/11/12
- Re: [Qemu-devel] How to emulate block I/O timeout on qemu side?, Marc Olson, 2018/11/12
- Re: [Qemu-devel] How to emulate block I/O timeout on qemu side?, Dongli Zhang, 2018/11/12
Re: [Qemu-devel] How to emulate block I/O timeout on qemu side?, Eric Blake, 2018/11/05