[livueta]

> Enable lz4 compression everywhere

Is the perf penalty low enough now that it just doesn't matter? I've always disabled compression on datasets I know are going to store only high-entropy data, like encoded video, that has a poor compression ratio.

I second the hot spare recommendation many times over. It can save your bacon.

[simcop2387]

It's generally the other way around actually, aside from storing already highly compressed datasets (e.g. video). The compression from lz4 will get you better effective performance because of the lower amount of io that has to be done, both in throughput and latency on zfs. This is because your CPU can usually do lz4 at hundreds of gb/s compared to the dozen you might get on your spinning rust disks.

[livueta]

Neat! Makes sense.