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Don't do *Solaris, go with FreeBSD if you really don't trust Linux ZFS.

I used to administrate a Solaris box using ZFS. I'm still missing organs from those days (required for sacrifices to tentacled horrors).

Also I was initially confused by your desire to use ZFS with a database until I saw the "OLAP".

Godspeed.

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So far I find ZFS "sensible", considering I am no LVM expert.

So far volume creation and snapshots seem straightforward, and it only took a bit of research to find the page size and ARC limits that so far are giving me better than XFS on CentOS.

What future pitfalls am I looking forward to?

I run FreeBSD and Postgres on ZFS. It's been an entirely painless experience. No pitfalls to look out for from where I sit. Your use-case and results may differ.

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