similar to: performance between guestfish and qemu-nbd

2017-07-27 20:18 GMT+08:00 Richard W.M. Jones <rjones@redhat.com>: > On Thu, Jul 27, 2017 at 06:34:13PM +0800, lampahome wrote: > > I can mount qcow2 img to nbd devices through guestfish or qemu-nbd > > > > I'm curious about which performance is better? > > They do quite different things, they're not comparable. > > Can you specifically give the

2017-07-28 0:31 GMT+08:00 Richard W.M. Jones <rjones@redhat.com>: > On Fri, Jul 28, 2017 at 12:23:04AM +0800, lampahome wrote: > > 2017-07-27 20:18 GMT+08:00 Richard W.M. Jones <rjones@redhat.com>: > > > > > On Thu, Jul 27, 2017 at 06:34:13PM +0800, lampahome wrote: > > > > I can mount qcow2 img to nbd devices through guestfish or qemu-nbd > >

On Fri, Jul 28, 2017 at 12:23:04AM +0800, lampahome wrote: > 2017-07-27 20:18 GMT+08:00 Richard W.M. Jones <rjones@redhat.com>: > > > On Thu, Jul 27, 2017 at 06:34:13PM +0800, lampahome wrote: > > > I can mount qcow2 img to nbd devices through guestfish or qemu-nbd > > > > > > I'm curious about which performance is better? > > > > They

Hi All, I am unable to figure out the issue here, when I try to create a filesystem (ext4) on a virtual disk using qemu-nbd. This happens intermittently. Following is the sequence of commands:- $> qemu-img create -f qcow2 test.qcow2 30G $> qemu-nbd --connect=/dev/nbd0 test.qcow2 $> *mkfs.ext4 /dev/nbd0* * mkfs.ext4: Device size reported to be zero. Invalid partition specified, or*

Hi, So I've been hacking together an nbdkit plugin (similar to the "file" plugin, but it splits the file up into chunks): https://github.com/pepaslabs/nbdkit-chunks-plugin I got it to the point of being a working prototype. Then I threw it onto a raspberry pi, which it turns out only has a 50/50 shot of fallocate() working correctly. I'm checking the return code of

I'm using qemu-nbd to setup the device with an offset into the image. Using libguestfs version 1.21.22 Code for adding the drive: char *server[] = { "localhost:3000", NULL }; if (guestfs_add_drive_opts (g, "" /* export name - see below */, GUESTFS_ADD_DRIVE_OPTS_FORMAT, "raw", GUESTFS_ADD_DRIVE_OPTS_PROTOCOL, "nbd",

I have a system with a large LVM VG partition. I was wondering if there is a way i could share the partition using nbd and have the nbd-client have access the LVM as if it was local. SYSTEM A: /dev/sda3 is a LVM partition and is assigned to VG volgroup1. I want to share /dev/sda3 via nbd-server SYSTEM B: receives A''s /dev/sda3 as /dev/nbd0. I want to access it as VG volgroup1. I am

On Mon, 15 Oct 2018, Nir Soffer wrote: > On Sat, Oct 13, 2018 at 9:45 PM Eric Wheeler <nbd@lists.ewheeler.net> wrote: > Hello all, > > It might be neat to attach ISOs to KVM guests via websockets.  Basically > the  browser would be the NBD "server" and an NBD client would run on the > hypervisor, then use `virsh change-media vm1 hdc

hello, I would only like to have guestmount in my toolkit to read-only vhd/vhdx images, so I try to compile libguestfs with a minimum of dependencies. I downloaded the 1.38-stable sources, installed the necessary dependencies and compiled them with the command : ./configure --disable-ocaml --disable-perl --disable-ruby --disable-haskell --disable-php --disable-erlang --disable-lua

On Mon, Oct 15, 2018 at 10:28:25AM -0400, Raghuram Devarakonda wrote: > On Mon, Oct 15, 2018 at 3:54 AM Richard W.M. Jones <rjones@redhat.com> wrote: > > > > [Adding libguestfs mailing list] > > > > On Sun, Oct 14, 2018 at 11:53:17AM -0400, Raghuram Devarakonda wrote: > > > Hi, > > > > > > In our project, we deal with quite large sparse

On Thu, 28 May 2020, Richard W.M. Jones wrote: > On Thu, May 28, 2020 at 12:24:22AM +0000, Eric Wheeler wrote: > > On Mon, 15 Oct 2018, Nir Soffer wrote: > > > On Sat, Oct 13, 2018 at 9:45 PM Eric Wheeler <nbd@lists.ewheeler.net> wrote: > > > Hello all, > > > > > > It might be neat to attach ISOs to KVM guests via websockets. 

On Thu, Jul 27, 2017 at 06:34:13PM +0800, lampahome wrote: > I can mount qcow2 img to nbd devices through guestfish or qemu-nbd > > I'm curious about which performance is better? They do quite different things, they're not comparable. Can you specifically give the commands you are trying? We might be able to give more sensible advice. Rich. -- Richard Jones, Virtualization

[Adding libguestfs mailing list] On Sun, Oct 14, 2018 at 11:53:17AM -0400, Raghuram Devarakonda wrote: > Hi, > > My name is Raghuram Devarakonda and I am a big fan of "nbdkit". I have > successfully used it to prototype (using Python plugin) a complex > project in our company and since then, I have also been trying to > understand and learn "guestfs-tools"

Hi, List, I''m trying xl create a pv guest with qcow/qcow2 image, it always fails at libxl_device_disk_local_attach. #xl create pv_config_file libxl: error: libxl.c:1119:libxl_device_disk_local_attach: cannot locally attach a qdisk image if the format is not raw libxl: error: libxl_create.c:467:do_domain_create: failed to run bootloader: -3 disk configuration is: disk=[

On Tue, Apr 09, 2013 at 10:18:50AM -0400, Skippy VonDrake wrote: > Hello, > > Apologies upfront if posting to this list is inappropriate. > > I have an app that forks a process with calls qemu-nbd with an offset > into an image. > The app then uses libguestfs to attach the nbd device. > But it appears that qemu is failing. When you say "qemu is failing", do you

I followed the guildline in http://libguestfs.org/guestfs-building.1.htm ./autogen.sh > make But I didn't see any executable file. I only see /fish/guestfish and /bash/guestfish the first one seems like a script.

When parsing the URI, drop the leading '/' from the path also when the protocol is 'nbd': in this case, the path represents the export name, which does not need the '/' coming from the URI format. Improve the coverage for nbd in test-add-uri.sh, adding a couple of tests, and adjusting the result of an existing one. --- fish/test-add-uri.sh | 8 +++++++- fish/uri.c

On Sat, Nov 7, 2015 at 5:03 AM, Richard W.M. Jones <rjones@redhat.com> wrote: > How about 'strace mkfs.ext2 ..' and see if any system calls are > returning errors. That would show you whether nbd-client is throwing > errors away, or whether mkfs is getting the errors and ignoring them > (seems pretty unlikely, but you never know). > > After that, it'd be down

[adding qemu list] On 5/29/20 4:37 AM, Richard W.M. Jones wrote: > Going back to the original email from 2018: > >> It might be neat to attach ISOs to KVM guests via websockets.  Basically >> the  browser would be the NBD "server" and an NBD client would run on the >> hypervisor, then use `virsh change-media vm1 hdc --insert /dev/nbd0` could >> use

On Mon, Jul 31, 2017 at 06:52:28PM +0800, lampahome wrote: > if I mount through guestfs library in python or guestfish, the same > condition happenes? > > I mean the insane number of layers and the performance No. The layers are only present because guestmount uses FUSE. libguestfs itself performs very well if you are careful to use it in the correct way. The architecture of