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1 Exabyte capacity (2^60 = 1 million terrabytes).
Fine-grained, live-view history retention for snapshots and undo.
Fast crash recovery on mount via UNDO FIFO.
Non-queued mirroring, master-to-many-slaves, slave-to-many-slaves.
64 bit inodes, 2^63 byte file size limit. Stable inode numbers (never reused).
Data and meta-data CRCs, non-recursive.
Pseudo-filesytems with independent inode numbering spaces.
(For export, backup, mirroring, sub-mounts, and snapshot management).
HAMMER Quick Feature List