The ZFS Intent Log ("ZIL") is a mechanism that gathers together in memory transactions of writes, and is flushed onto disk when synchronous semantics is necessary. In the event of crash or power failure, the log is examined and the uncommitted transaction would be replayed to maintain the synchronous semantics.

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BIND 9 is an implementation of the Domain Name System (DNS) protocols. The named(8) daemon is an Internet Domain Name Server.

DNS Security Extensions (DNSSEC) provides data integrity, origin authentication and authenticated denial of existence to resolvers.

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