[prev in list] [next in list] [prev in thread] [next in thread] 

List:       kvm
Subject:    Re: How to share filesystem
From:       Brian Jackson <iggy () theiggy ! com>
Date:       2013-09-25 14:49:33
Message-ID: ef9103be-ac1e-4c2d-ba88-a13d1da7ab05 () theiggy ! com
[Download RAW message or body]

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 majordomo@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 majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
[prev in list] [next in list] [prev in thread] [next in thread]