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by ryao 3677 days ago
btrfs development started in 2007 while ZFS development started in 2001. If you want to do a point in time comparison, look at how ZFS was in 2010. You can get the last copy of OpenSolaris for the comparison. It would need to be done on physical hardware due to poor support for virtualization back then.

By the way, ZFS was deemed production ready after 4 years of development.
1 comments
tete 3677 days ago
That's true. One quick side note though: BTRFS actually had a fairly long "draft period" (multiple years) of design. I have no clue how long that was on ZFS. I just know that the original author mentioned that somewhere.
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ryao 3677 days ago
If you have time, you can watch this video where Jeff Bonwick describes the birth of ZFS:

http://m.youtube.com/watch?v=dcV2PaMTAJ4

I am the guy who asked the LZJB question. To summarize my recollection, formal design work on ZFS started in 2001 when Matthew Ahrens started working at Sun. Jeff Bonwick had promised Matthew Ahrens a job at Sun making a filesystem a 6 months to a year before then when Matt was still in college. I am sure that both Jeff and Matt had some thoughts on it during that time, but there was no formal effort until Matt's employment started.

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