[OmniOS-discuss] ZFS snapshot overhead

[Peter Tribble]

Does anyone know what the overhead of a zfs snapshot is?

I'm not talking about the data, I'm talking about whatever space
zfs needs to allocate internally for housekeeping.

A quick estimate indicates something around 2M of overhead.

(I've just deleted ~35k snapshots on a system, each taking no space.
I was a little surprised - although pleased - to get ~70G of space back
in the pool.)

-- 
-Peter Tribble
http://www.petertribble.co.uk/ - http://ptribble.blogspot.com/
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