[libvirt] storage volume download/upload

[Vasiliy Tolstov]

As i see in some cases, for example in case of lvm storage pool
libvirt spawns libvirt_iohelper to upload or download data to volume.
But in case of big data contains zeroes this is wast bw of network.
May be we can use gzip or lz4 for compression stream?
How the best do this not breaking exiting software?
May be add new parameter to libvirt_iohelper with compression method
and compression level? In my cases of 20-160 Gb data and used only 4-5
Gb this provide major benefit....
Thanks!

-- 
Vasiliy Tolstov,
e-mail: v.tolstov at selfip.ru
jabber: vase at selfip.ru