[linux-lvm] copy lv from lv?
Ray Morris
support at bettercgi.com
Tue Mar 29 17:48:14 UTC 2011
> if lvm do not support lv copy? it is better copy on write.
> dd takes long time.
For a complete copy the only thing faster than "dd" is two
copies of "dd" piped together. dd is basically limited by
the speed of the physical disks, assuming proper arguments
to dd. For a copy on write, that's called a snapshot. LVM
COULD beused to copy, by making and splitting a mirror, but
that's going to be a lot slower than dd. (Though a mirror and
split can be used on a live filesystem, wth it unmounted only
for an instant during the split).
--
Ray Morris
support at bettercgi.com
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On Tue, 29 Mar 2011 20:53:37 +0800 (CST)
yue <ooolinux at 163.com> wrote:
> if lvm do not support lv copy? it is better copy on write.
> dd takes long time.
>
> thanks
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