Re: [Libguestfs] Question about "btrfs send/receive" cmd
On Tue, Jun 23, 2015 at 02:57:30PM +0800, Cao jin wrote:
Hi,
I am considering implement "btrfs send/receive" API in
libguestfs. But seems its usual condition is incremental backup
which is pretty complicated (see 5.7.1:
http://docs.oracle.com/cd/E37670_01/E37355/html/ol_sendrecv_btrfs.html)
and not suitable for implementation as I think.
So I am considering, does it make sense to implement a simplest form:
$ btrfs send -f sent_file subvol
$ btrfs receive -f sent_file mountpoint
which just backup a subvolume and restore it.
Anyone have suggestions?
The natural way would be to map this to FileIn/FileOut so that the
input/output can be streamed to the client. Compare the tar-in and
tar-out APIs:
https://github.com/libguestfs/libguestfs/blob/master/daemon/tar.c
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-df lists disk usage of guests without needing to install any
software inside the virtual machine. Supports Linux and Windows.
http://people.redhat.com/~rjones/virt-df/