2.10 The Zettabyte FilesystemThe Zettabyte filesystem (ZFS) is in a class of filesystems that never overwrite existing data. This type of filesystem design was pioneered at Berkeley and a production-capable implementation was released as the log-structured filesystem in 4.4BSD.The idea of a non-overwriting filesystem is sound and was picked up and greatly enhanced by Sun Microsystems, which rele..

2.5 Security The FreeBSD security model has been developed over 40 years of evolving application needs. The key insight is that security must be part of system design; it cannot be successfully added later. The model addresses many different goals:Support authenticated local and remote access by multiple users, as well as integration with distributed authentication and directory servicesAllow us..