Options:

• Threads & threads::shared.

  Relatively speed efficient, but somewhat memory hungry.

• forks & Forks::shared.

  Horribly (speed) inefficient -- reads, writes, updated, deletes, locks, signals et al. are communicated between processes via serialisation and sockets to implement a client/server architecture.

• Sys::Mmap

  Only does strings. You need to implement structures (hashes or arrays) on top of that module. Perhaps via tie.