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ZFS High Availability with Asynchronous Replication and zrep (klarasystems.com)

submitted 4 months ago by [email protected] to c/[email protected]

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Describes the zrep script that uses zfs send and receive over network to keep a read-only copy of snapshots up-to-date.

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[–] [email protected] 1 points 4 months ago* (last edited 4 months ago) (2 children)

I've been hearing about ZFS and its beneficial features for years now, but mainstream Linux installers don't seem to support it, and I can't be bothered to switch filesystems after installing.

Out of curiosity - can anyone tell, what might be blocking them?

Edit: answering my own question: legal issues. Licenses "potentially aren't compatible".

Due to potential legal incompatibilities between the CDDL and GPL, despite both being OSI-approved free software licenses which comply with DFSG, ZFS development is not supported by the Linux kernel. ZoL is a project funded by the Lawrence Livermore National Laboratory to develop a native Linux kernel module for its massive storage requirements and super computers.

Source: https://wiki.debian.org/ZFS

[–] [email protected] 4 points 4 months ago

Apart from the license incompatibility (which doesn't stop it from being used by distros, as Ubuntu has shown): While it's a fantastic filesystem for servers, it is also resource hungry and not suitable for small or portable systems.

[–] [email protected] 2 points 4 months ago

By default it consumes 30% of RAM as cache (ARC). And, we have btrfs now, which is a huge contender "CoW" filesystem for desktop.