Re: [zfs-discuss] sizing for L2ARC and dedup...

2010-03-01 Thread Daniel Carosone
On Mon, Mar 01, 2010 at 09:22:38AM -0800, Richard Elling wrote: > > Once again, I'm assuming that each DDT entry corresponds to a > > record (slab), so to be exact, I would need to know the number of > > slabs (which doesn't currently seem possible). I'd be satisfied > > with a guesstimate bas

Re: [zfs-discuss] sizing for L2ARC and dedup...

2010-03-01 Thread Richard Elling
On Feb 28, 2010, at 11:04 PM, Erik Trimble wrote: > Richard Elling wrote: >> On Feb 28, 2010, at 7:11 PM, Erik Trimble wrote: >> >>> I'm finally at the point of adding an SSD to my system, so I can get >>> reasonable dedup performance. >>> >>> The question here goes to sizing of the SSD for us

Re: [zfs-discuss] sizing for L2ARC and dedup...

2010-02-28 Thread Erik Trimble
Richard Elling wrote: On Feb 28, 2010, at 7:11 PM, Erik Trimble wrote: I'm finally at the point of adding an SSD to my system, so I can get reasonable dedup performance. The question here goes to sizing of the SSD for use as an L2ARC device. Noodling around, I found Richard's old posing on

Re: [zfs-discuss] sizing for L2ARC and dedup...

2010-02-28 Thread Richard Elling
On Feb 28, 2010, at 7:11 PM, Erik Trimble wrote: > I'm finally at the point of adding an SSD to my system, so I can get > reasonable dedup performance. > > The question here goes to sizing of the SSD for use as an L2ARC device. > > Noodling around, I found Richard's old posing on ARC->L2ARC memo

[zfs-discuss] sizing for L2ARC and dedup...

2010-02-28 Thread Erik Trimble
I'm finally at the point of adding an SSD to my system, so I can get reasonable dedup performance. The question here goes to sizing of the SSD for use as an L2ARC device. Noodling around, I found Richard's old posing on ARC->L2ARC memory requirements, which is mighty helpful in making sure I d