Way to prune/limit the ZFS zpool history?
gfritz at gmail.com
Tue Jan 20 16:16:55 PST 2009
I've been experimenting with a series scripts that takes ZFS snapshots every
minute, eventually destroying the oldest so that only so many remain available
for a given window of time.
This may seem a trivial concern with hard drive sizes being what they are
these days, but after running a "zpool history" I started thinking that a ZFS
create and destroy being performed every minute would add up to a lot over
the course of a few years (current estimate is 62MB/year for the naming scheme
of my snapshots).
>From what I understand, ZFS compresses metadata by default, so this history
probbaly won't take up much space in the grand scheme of things. However, I
was curious just the same about wether or not there was a way to prune down,
or limit the size of, the zpool history.
Also, is there any substantial performance penalty to having a huge history?
Thanks for any pointers.
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