On Mon, Jan 18, 2010 at 3:49 PM, Richard Elling <richard.ell...@gmail.com>wrote:
> On Jan 18, 2010, at 7:55 AM, Jesus Cea wrote: > > zpool and zfs report different free space because zfs takes into account > > an internal reservation of 32MB or 1/64 of the capacity of the pool, > > what is bigger. > > This space is also used for the ZIL. > > > So in a 2TB Harddisk, the reservation would be 32 gigabytes. Seems a bit > > excessive to me... > > Me too. Before firing off an RFE, what would be a reasonable upper > bound? A percentage? > -- richard > > > Not being intimate with the guts of ZFS, it would seem to me that a percentage would be the best choice. I'll make the (perhaps incorrect) assumption that as disks grow, if you have a set amount of free space (say 5g), it becomes harder and harder to find/get to that free space resulting in performance tanking. Where as we can expect linear performance if it's a percentage. No? -- --Tim
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