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For RHEL7, XFS is the recommended filesystem. It has a lot of backports so don't be fooled by the 3.10 kernel version---but not CoW. Btrfs is not mature enoug

by bonzini 10y ago

For RHEL7, XFS is the recommended filesystem. It has a lot of backports so don't be fooled by the 3.10 kernel version---but not CoW. Btrfs is not mature enough. ZFS-on-linux is not supported and I've never seen a customer using it.