I'm using Ubuntu 11.10 Desktop x64 with Native ZFS using a mirrored pool of 2x2 TB 6.0 Gbps hard drives. My issue is that I'm only getting about 30 Mb/s read/write at any time, I would think my system could perform faster.
There are some limitations though:
I'm using an Asus E350M1-I Deluxe Fusion which is a 1.6 Ghz processor and a maximum of 8 Gb ram, which I got. I didn't know about ZFS when I bought the system and these days I would've selected a system capable of more ram.
My pool has about 15% free space, but performance wasn't that much better when I had more than 50% free space.
When the processor is very busy the read/write performance seems to decrease, so it may very well be the processor that is the bottle neck.
I've read the other posts on this site about using an SSD as a log cache device which is what I'm thinking of doing, considering I don't have that much ram.
Do you think adding a SSD as log cache device will improve performance?
Should I instead get another 2 TB hard drive and make a RAID-Z pool instead? (I'm gonna need the space eventually, however the price is still high on mechanical drives) Would this increase performance?
Sell my system and go for an Intel i3 instead?
Thanks for your time!