Re: [zfs-discuss] Summary: Dedup and L2ARC memory requirements

2011-05-07 Thread Erik Trimble
On 5/7/2011 6:47 AM, Edward Ned Harvey wrote: See below. Right around 400,000 blocks, dedup is suddenly an order of magnitude slower than without dedup. 40 10.7sec 136.7sec143 MB 195 MB 80 21.0sec 465.6sec287 MB 391

Re: [zfs-discuss] Summary: Dedup and L2ARC memory requirements

2011-05-07 Thread Edward Ned Harvey
> See below. Right around 400,000 blocks, dedup is suddenly an order of > magnitude slower than without dedup. > > 4010.7sec 136.7sec143 MB 195 MB > 8021.0sec 465.6sec287 MB 391 MB The interesting thing is

Re: [zfs-discuss] Summary: Dedup and L2ARC memory requirements

2011-05-07 Thread Edward Ned Harvey
New problem: I'm following all the advice I summarized into the OP of this thread, and testing on a test system. (A laptop). And it's just not working. I am jumping into the dedup performance abyss far, far eariler than predicted... My test system is a laptop with 1.5G ram, c_min =150M, c_max