A lot has changed. Well - one thing actually: you no longer lose your ZFS pool if your dedicated ZIL log (called a SLOG) dies.<p>Here is some info on ZIL vs SLOG:
<a href="http:&#x2F;&#x2F;www.freenas.org&#x2F;blog&#x2F;zfs-zil-and-slog-demystified&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.freenas.org&#x2F;blog&#x2F;zfs-zil-and-slog-demystified&#x2F;</a>