![]() Zfs scrub checks the existing data on a pool and rewrites any corrupted copies if there is sufficient redundancy to have a good copy that matches the checksum.if not, it just warns of the un-correctable error. See man zfs and search for zfs send for more details. This is why ZFS uses lz4 compression for all of its own metadata and for the L2ARC (level 2 adaptive replacement cache). Note: you can not do this with zfs send's -R ( -replicate) option because that also turns on send's -p ( -props) option. With lz4’s early abort feature, the worst case is only a few milliseconds slower than opting out of compression, but the benefits are usually quite significant. In addition, native properties are either editable or read-only. Native properties either export internal statistics or control ZFS behavior. a backup pool), destroy the dataset from the original pool (or destroy the pool and re-create it), and then zfs send it back. zfsprops native and user-defined properties of ZFS datasets DESCRIPTION Properties are divided into two types, native properties and user-defined (or 'user') properties. It is fast and gives a decent am tradeoff to get substantial gains. This will, of course, break any connection to any prior snapshots of the same filename (and also to any hard links to the file as the inode will be different).Īlternatively, to apply such changes to an entire pool or dataset, you could zfs send a snapshot to a different pool (e.g. For many ZFS environments, lz4 compression is the go-to solution. To apply changes like this to existing files, you would need to copy them and mv them over the original. Changing dataset properties like compression and copies only affects files written after the change. OpenZFS recommends using device IDs when creating ZFS storage pools of less than 10 devices.
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