Additionally Optane is more organized like RAM. If you really need small random read write performance you do not have an alternative. While on most workloads you will not see much difference as most workloads are more sequential or the RAM takes the load some are different. Ultra critical or performance sensitive workloadsĬompared to a fast NVMe it reduces latency from 30us down to 10us and increases iops from 80k to 500k. Powerloss protection when you want sync write.Ĥ. A dedicated Slog is not needed but prefer SSDs with Critical workloads (many user, many random data) Such a combination can be nearly as fast as a pure SSD pool at a fraction of the cost with higher capacity.Įven an SMB filer with a secure write behaviour (sync-write=always) is now possible as a 4 x HGST HE8 disks in a Raid-0 + an Optane 900P offered 1.6 GB/s sync write performance on Solaris and 380GB/s on OmniOSģ. The huge fallback when using sync-write can be nearly eleminated by a fast Optane Slog like the 900P. As long as you can process your workload mainly from RAM, it is tremendous fast. In my tests I used a pool from 4 x HGST HE8 disks with a combined sequential read/write performance of more than 1000 MB/s. Even a pure HD pool can be nearly as fast as a NVMe pool. Ifyou have a faster network (10/40G) add more RAM and use 32-64G and more.Ģ. In a homeserver/ mediaserver/ SoHo filer environment with a few users and 1G networks 4-8GB RAM is ok.In a multiuser environment or with large amount of random data (VMs, larger databases) use 16-32GB RAM. If your workload exceed your RAM capabilities or cannot use the RAM like with sync-write performance canĭramatically go down.
![zfs vs openzfs zfs vs openzfs](https://i.ytimg.com/vi/GhDXv4DfiQg/maxresdefault.jpg)
Write cache (OmniOS default: 10% of RAM, max 4GB) and add the RAM that you want as readcache. Whenever your workload can be mainly processed within your RAM, even a slow HD pool is nearly asįast as an ultimate Optane pool. If you want to build a ZFS system this may help to optimize.
Zfs vs openzfs free#
The effect of RAM and the difference between native ZFS in Oracle Solaris v.37 vs OpenZFS in the free This benchmark sequence was intended to answer some basic questions about disks, ssds, NVMe/Optane,