This LZO issue is something that might crop up again and again in different shapes. If ZFS is being adopted on different operating systems, people might start cooking their own soups.
What are the plans to keep this under control? What if Unix Variant/Clone X suddenly decides their ZFS code needs to support three new compression schemes as well two new hashes? Disregarding that there doesn't seem to be much merit to that (though LZO seems promising), this could hinder interoperability. Now lets consider a worse case, what if Unix Variant Y thinks it figured out some nice performance tweaks, but requires changes to the on-disk layout? I'm just saying this, because OpenSolaris is the smaller player at the table. Going with the hypothetical scenario where OpenSolaris goes GPLv3 and Linux merging ZFS into the kernel, they could just bully in changes. Maybe I'm just being paranoid, but the point still stands. The filesystem isn't that widely established, so one could be tempted to break things. -mg
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