swapping LVs about

[Alexander Skwar]

· Gabriel M Dragffy <dragffy at yandex.ru>:

> I don't understand quite exactly. Am I right in thinking that if I
> create a snapshot volume it will gradually grow larger as I make changes
> to the volume it is partitioning?

No. Gradually, the assigned space will be used. In the beginning,
the assigned space is unused, as no changes need to be noted. The
assigned space is used to store the changed "blocks" from the
original LV.

> In this case how do I know when the 
> snapshot volume it running out of space?

lvdisplay shows how much space is used. Compare the output of
a snapshot lv and a normal lv.

> And also doesn't this affect 
> performance since you are simultaneously writing changes to a volume and
> it's snapshot...?

I haven't checked, but I'd very much suspect so, yes.

Alexander Skwar
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