Haskell database library with ACID guarantees - GHC libraries

 AcidState is a Haskell library to store serializable Haskell
 structures, guaranteeing that transactions support the ACID
 semantic. That is, they must be atomic (a transaction must be
 completely saved or completely rolled back), consistent (after each
 transaction the state of the database must be valid), isolated (two
 parallel transaction must not interfere with each other) and durable
 (a successful transaction must be reliably stored to a persistent
 memory).
 .
 This library supports both storing data on the local disk and via a
 network server.
 .
 This package provides a library for the Haskell programming language.
 See http://www.haskell.org/ for more information on Haskell. It
 obsoletes the package haskell-happstack-state.