If the deal to buy Sun goes through, I highly doubt MySQL, Solaris, or ZFS will die. Why? Because they allow Oracle to become the next IBM. They will have full control over the entire computing experience, from the hardware, to the OS, to the storage stack, to the software.
You want to run a storage server? Solaris + ZFS.
Want to run an enterprise database server? Solaris + ZFS + Oracle DB.
Want to run a non-enterprise database server? Solaris + ZFS + MySQL.
Want to run an enterprise web server? Solaris + ZFS + Java middleware + Oracle DB.
And so on.
The only bit that may be dropped in the merger would be SPARC. Everything is heading toward 64-bit x86 hardware. Which is kind of sad considering the technology in the T1/T2 line, especially for web servers.
MySQL will become the entry-level Oracle DB, with a migration path available into the full Oracle.
Btrfs is still a good 3-5 years until it's ready for enterprise storage uses. And the UI for it is just horrible (they're still trying to figure out how to make df work on a btrfs). Not to mention the horrible management tools for it (the "filesystem" is the lowest layer in the stack? Really? With RAID done as part of the filesystem? And the filesystem split into sub-volumes? All managed via mount?). Development won't stop, but it's nowhere near a ZFS-level solution.
ZFS has been under development and in use for 10 years now, and is still under heavy development. It's still receiving features that Btrfs doesn't even have on the radar (dedupe just went in last week, over-the-wire dedupe went in, triple-parity (RAID7?) went in before that with a goal of having N-parity support in the future, encryption is almost ready to go int, etc). ZFS development won't be stopping anytime soon. And even if Oracle tries to drop it, it's open-source, and I highly doubt that the heavy-coders for it are going to just stop working on it.
IOW, Oko, you really need to turn down your hatred toward Oracle and Sun. If anything, you should be railing against the EU for slowing things down to the point that the merger has become a battle of attrition, by which I mean that there won't be anything left of Sun's customer base by the time the EU realises that there's nothing to worry about.
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