ZFS: How to enable cache and logs.

[Daniel Kalchev]

On 12.05.11 11:02, Šimun Mikecin wrote:
>
> You will not find a rotating hard drive that has a write latency anything near the write latency of even a slowest SSD you can find on the market.
>
Cheap SSDs do not have acceptable latency, when saturated with writes. 
Not to speak of throughput.

Truth is, SLOG should be on write-optimized SLC SSD. Any tricks, such as 
compression, manufacturers make with consumer products do influence 
Windows benchmarks, but are unlikely to change laws of physics.

For most small installs, using rotating magnetic media (cheap!) as SLOG, 
can have dramatic performance improvement compared to not using any SLOG.

Daniel