3 ms·

I've seen L2ARC (and SLOGs too) die before, and ZFS kept on working. Just expect a hit on performance if your workload leans heavily on the L2ARC. Also, in my

by dmpk2k 11y ago

I've seen L2ARC (and SLOGs too) die before, and ZFS kept on working. Just expect a hit on performance if your workload leans heavily on the L2ARC. Also, in my experience, L2ARC is a lot less useful than a lot of people think; doing some workload characterisation is an interesting and informative exercise. As an aside: an SLOG is usually useful. Unless your workload is effectively read-only, a SLOG can make a pool perform close to SSD levels for most workloads on the cheap. Just be careful to get a quality SSD for the SLOG.

voltagex_ 11y ago
Bah, every time I think I've got a handle on ZFS I learn something new that tells me I haven't configured my system properly. I've got 2 mirrored vdevs and a 120GB SSD as L2ARC - I'm not sure I'd get much more of a benefit from SLOG, although it might speed up some jails. CIFS transfers are going at 800 - 900 megabits, and moving to 10GBe isn't feasible yet ;). OT: Anyone seen behaviour like this? https://lists.freebsd.org/pipermail/freebsd-net/2016-February/044619.html https://lists.freebsd.org/pipermail/freebsd-net/2016-Februar...