Index A | B | C | E | F | G | H | I | K | L | M | O | P | R | S | T | V | W | X A ACID B BASE Blob Branch C Cache CAP theorem Cassandra Clone Column Family Commit Consistency Consistent hash function CouchDB E Eventual Consistency F Fork G Git GitHub GitLab Graph model Graph partitioning Graph traversal H HBase HEAD Hypertable I Index K Key/value pair L Locking M MapReduce Merge request MongoDB MVCC – Multiversion Concurrency Control O Object Optimistic concurrency origin P Packfile Paxos Pessimistic locking PGM Property graph model Python Enhancement Proposals PEP 20 PEP 249 PEP 257 PEP 307 PEP 3154 PEP 503 PEP 557 PEP 574 PEP 621 PEP 639 PEP 643 PEP 658 PEP 659 PEP 799 R Redis Reference Reflog Remote repository RFC RFC 4122 RFC 4180 RFC 4506 RFC 6902 RFC 7158 Section 9 RFC 7159 RFC 8259 Riak S Semantic integrity Staging area T Tag object TBD Tree Trunk-Based Development Two-phase locking (2PL) V Vector clock W Working Tree X XPATH XQuery XSLT