3 ms·
Frankly, I suspect the ZFS community is in denial, or optimizing for cost. I got what I think is a correctly configured ZFS system and its getting the same spe
by frozenport 9y ago
Frankly, I suspect the ZFS community is in denial, or optimizing for cost.
I got what I think is a correctly configured ZFS system and its getting the same speeds as most people report online.
NOW the thing is that the ZFS system doing about 2x worse for the dense sequential write workloads compared to the RAID6 HW solution. Not to mention eating a dozen or so GBs of RAM.
- olavgg 9y agoZFS autotunes memory allocation based on how much ram you have, if you have 128GB ram free, ZFS will use that. In fact all operating systems eat GB's of free RAM just like ZFS. Software raid has a larger write penalty, that is why you see slower write performance versus using hardware raid. As I said earlier, writing directly to memory helps. Recommended read: http://rickardnobel.se/raid-5-write-penalty/ http://rickardnobel.se/raid-5-write-penalty/
- frozenport 9y agoSo, basically, if you're building a $15,000 storage box, cough up $500 for a hardware RAID solution.