WAL en · NOUN Meanings (abbreviation, acronym, alt-of, uncountable) Acronym of write-ahead logging. alt of write-ahead logging (abbreviation, acronym, alt-of, countable) Acronym of write-ahead log. alt of write-ahead log In HBase, logs are appended to the WAL before any edit operations (put and increment) are persisted to disk. 2012, Eric Redmond, Jim Wilson, edited by Jacquelyn Carter, Seven Databases in Seven Weeks, Pragmatic Bookshelf, →ISBN: Forms SpellingFeaturesLabelsSource WALs Number=Plur lexicographic