Re: How to share filesystem
On Tuesday, September 24, 2013 3:38:39 AM CDT, Ross Boylan wrote: I would like to have access to the same file system from the host and the guest. Can anyone recommend the best way to do this, considering ease of use, safety (concurrent access from guest and host does not corrupt) and performance? For example, I would like to restore files from backup using the host, but write to filesystems used by the guest. I have previously used kvm mostly with disks that are based on LVM logical volumes, e.g. -hda /dev/turtle/Squeeze00. Since the LVs are virtual disks, I can't just mount them in the host AFAIK. Among the alternatives I can think of are using NFS and using NBD. Maybe there's some kind of loopback device I could use on the disk image to access it from the host. I would suggest NFS/CIFS generally speaking. 9p/virtio is an option, but NFS and CIFS are going to be far more stable, tested, and fast. Host: Debian GNU/Linux wheezy, amd64 architecture, qemu-kvm 1.1.2 Guest: Debian GNU/Linux lenny i386. Host processor is a recent i5 with good virtualization (flaga: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms) Thanks. Ross Boylan -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
How to share filesystem
I would like to have access to the same file system from the host and the guest. Can anyone recommend the best way to do this, considering ease of use, safety (concurrent access from guest and host does not corrupt) and performance? For example, I would like to restore files from backup using the host, but write to filesystems used by the guest. I have previously used kvm mostly with disks that are based on LVM logical volumes, e.g. -hda /dev/turtle/Squeeze00. Since the LVs are virtual disks, I can't just mount them in the host AFAIK. Among the alternatives I can think of are using NFS and using NBD. Maybe there's some kind of loopback device I could use on the disk image to access it from the host. Host: Debian GNU/Linux wheezy, amd64 architecture, qemu-kvm 1.1.2 Guest: Debian GNU/Linux lenny i386. Host processor is a recent i5 with good virtualization (flaga: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms) Thanks. Ross Boylan -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: How to share filesystem
Am Tue, 24 Sep 2013 01:38:39 -0700 schrieb Ross Boylan r...@biostat.ucsf.edu: I would like to have access to the same file system from the host and the guest. Can anyone recommend the best way to do this, considering ease of use, safety (concurrent access from guest and host does not corrupt) and performance? [...] Among the alternatives I can think of are using NFS and using NBD. Maybe there's some kind of loopback device I could use on the disk image to access it from the host. I've never tried it on my own, but there is also virtio-9p: http://wiki.qemu.org/Documentation/9psetup Maybe that's what you need? Thomas -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
RE: How to share filesystem
You can as well try Qemu-GuestAgent which uses Virtio-Serial communication for Guest and Host. -Original Message- From: kvm-ow...@vger.kernel.org [mailto:kvm-ow...@vger.kernel.org] On Behalf Of Thomas Huth Sent: Tuesday, September 24, 2013 3:54 PM To: Ross Boylan Cc: kvm@vger.kernel.org Subject: Re: How to share filesystem Am Tue, 24 Sep 2013 01:38:39 -0700 schrieb Ross Boylan r...@biostat.ucsf.edu: I would like to have access to the same file system from the host and the guest. Can anyone recommend the best way to do this, considering ease of use, safety (concurrent access from guest and host does not corrupt) and performance? [...] Among the alternatives I can think of are using NFS and using NBD. Maybe there's some kind of loopback device I could use on the disk image to access it from the host. I've never tried it on my own, but there is also virtio-9p: http://wiki.qemu.org/Documentation/9psetup Maybe that's what you need? Thomas -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: How to share filesystem
On Tue, 2013-09-24 at 12:24 +0200, Thomas Huth wrote: Am Tue, 24 Sep 2013 01:38:39 -0700 schrieb Ross Boylan r...@biostat.ucsf.edu: I would like to have access to the same file system from the host and the guest. Can anyone recommend the best way to do this, considering ease of use, safety (concurrent access from guest and host does not corrupt) and performance? [...] Among the alternatives I can think of are using NFS and using NBD. Maybe there's some kind of loopback device I could use on the disk image to access it from the host. I've never tried it on my own, but there is also virtio-9p: http://wiki.qemu.org/Documentation/9psetup Maybe that's what you need? Thomas At first I saw Plan 9 and figured it was irrelevant to linux, but the example seems to be Linux. So I'm puzzled. Ross -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: How to share filesystem
You。can use. Virtio-9p. In. Linux. 发自我的 iPhone 在 2013年9月25日，0:37，Ross Boylan r...@biostat.ucsf.edu 写道： On Tue, 2013-09-24 at 12:24 +0200, Thomas Huth wrote: Am Tue, 24 Sep 2013 01:38:39 -0700 schrieb Ross Boylan r...@biostat.ucsf.edu: I would like to have access to the same file system from the host and the guest. Can anyone recommend the best way to do this, considering ease of use, safety (concurrent access from guest and host does not corrupt) and performance? [...] Among the alternatives I can think of are using NFS and using NBD. Maybe there's some kind of loopback device I could use on the disk image to access it from the host. I've never tried it on my own, but there is also virtio-9p: http://wiki.qemu.org/Documentation/9psetup Maybe that's what you need? Thomas At first I saw Plan 9 and figured it was irrelevant to linux, but the example seems to be Linux. So I'm puzzled. Ross -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: How to share filesystem
9p is a protocol that is created by plan 9 operation system. linux can use virtio-9p. 发自我的 iPhone 在 2013年9月25日，3:03，shendl1...@gmail.com 写道： You。can use. Virtio-9p. In. Linux. 发自我的 iPhone 在 2013年9月25日，0:37，Ross Boylan r...@biostat.ucsf.edu 写道： On Tue, 2013-09-24 at 12:24 +0200, Thomas Huth wrote: Am Tue, 24 Sep 2013 01:38:39 -0700 schrieb Ross Boylan r...@biostat.ucsf.edu: I would like to have access to the same file system from the host and the guest. Can anyone recommend the best way to do this, considering ease of use, safety (concurrent access from guest and host does not corrupt) and performance? [...] Among the alternatives I can think of are using NFS and using NBD. Maybe there's some kind of loopback device I could use on the disk image to access it from the host. I've never tried it on my own, but there is also virtio-9p: http://wiki.qemu.org/Documentation/9psetup Maybe that's what you need? Thomas At first I saw Plan 9 and figured it was irrelevant to linux, but the example seems to be Linux. So I'm puzzled. Ross -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: How to share filesystem
On Wed, 2013-09-25 at 03:06 +0800, shendl1...@gmail.com wrote: 9p is a protocol that is created by plan 9 operation system. linux can use virtio-9p. 发自我的 iPhone Is this the preferred way to go? At any rate, I don't think I can use it easily because the wiki says it needs linux 2.6.36.rc4 or newer, and Lenny uses 2.6.26 and backports only has 2.6.32. Ross 在 2013年9月25日，3:03，shendl1...@gmail.com 写道： You。can use. Virtio-9p. In. Linux. 发自我的 iPhone 在 2013年9月25日，0:37，Ross Boylan r...@biostat.ucsf.edu 写道： On Tue, 2013-09-24 at 12:24 +0200, Thomas Huth wrote: Am Tue, 24 Sep 2013 01:38:39 -0700 schrieb Ross Boylan r...@biostat.ucsf.edu: I would like to have access to the same file system from the host and the guest. Can anyone recommend the best way to do this, considering ease of use, safety (concurrent access from guest and host does not corrupt) and performance? [...] Among the alternatives I can think of are using NFS and using NBD. Maybe there's some kind of loopback device I could use on the disk image to access it from the host. I've never tried it on my own, but there is also virtio-9p: http://wiki.qemu.org/Documentation/9psetup Maybe that's what you need? Thomas At first I saw Plan 9 and figured it was irrelevant to linux, but the example seems to be Linux. So I'm puzzled. Ross -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
