We couldn't be happier with how our platform works and people who need to zfs send to the cloud have been very happy as well. We did consider transitioning to Oracle back in 2011/2012 for ZFS support and I am glad we did not. They were quickly solved and I don't think you would ever run into them as they arose from circumstances that were fairly -specific. It has been over six years now, across 4 versions of FreeBSD and 3 internal hardware platform models and we've not lost one bit of data and I can only think of two or three performance issues that we had to bring in consultation for (from ZFS contributors/coders). I don't know how reassuring or actionable this is for you, but for what it's worth, transitioned from UFS2 to ZFS in late 2012 and have hundreds of zpools deployed all over the world - for ourselves and for our customers who 'zfs send' to us. Oracle no longer cares about Solaris and fired most of the people it inherited from Sun years ago. Features of ZFS include: pooled storage (integrated volume management zpool), Copy-on-write, snapshots, data integrity verification and automatic repair (scrubbing), RAID-Z, a maximum 16 exabyte file size, and a maximum 256 quadrillion zettabyte storage with no. There are a number of active academic and commercial contributors to OpenZFS, and it is used as one of the two main file system for the FreeBSD operating system. ZFS is an advanced filesystem created by Sun Microsystems (now owned by Oracle) and released for OpenSolaris in November 2005. OpenZFS probably receives more coding activity than Oracle's ZFS. "just as good" is a kind of abstract term, it is not exactly clear what you are trying to ask, but I would say by most metrics OpenZFS is a better product than Oracle's ZFS. However, Oracle cannot take away your right to use the software as granted to you under the original terms of the CDDL. Oracle can relicence the current OpenZFS projects (including other people's contributions to it) under an additional, new licence if they wish through article 4 of the CDDL. It is not developed or supported by Oracle. Oracle continues to maintain the original ZFS code in house and charges for it today, in several different products, including Solaris 11.
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