[Discuss] Backing up the entire filesystem

[Dan Ritter]

On Fri, Oct 26, 2018 at 01:55:57PM -0400, Shirley Márquez Dúlcey wrote:
> Another thing to keep in mind is that ZFS does have one flaw; it's a
> memory hog. If you have a large ZFS filesystem you will need a LOT of
> RAM to get acceptable performance. But it does represent the current
> state of the art for file system data integrity.


It only looks like a memory hog. ZFS correctly marks all of it's ARC as
cache, so it's mostly available when something else asks for it.

If you feel concerned, you can limit usage with with

options zfs zfs_arc_max=8589934592

(or however many bytes you want to limit it to)

-dsr-