Module `Lmdb.Env`

Collection of maps stored in a single memory-mapped file.

type t

module Flags = Mdb.EnvFlags

val create : _ perm -> ?⁠max_readers:int -> ?⁠map_size:int -> ?⁠max_maps:int -> ?⁠flags:Flags.t -> ?⁠mode:int -> string -> t

create perm path creates an environment with Ro or Rw permissions with data and lock files in the already existing directory path. If no separate directory is desired, Flags.no_subdir can be passed.

The returned handle is not garbage collected and should be closed explicitely to free locks and prevent corruption on async environments.

parameter map_size: Size of the memory map. Limited by the virtual address space.

parameter max_readers: Maximum number of threads/reader slots.

parameter max_maps: Maximum number of named maps.

parameter mode: The UNIX permissions to set on created files and semaphores. Default is 0o644.

val sync : ?⁠force:bool -> t -> unit
val close : t -> unit
val copy : ?⁠compact:bool -> t -> string -> unit
val copyfd : ?⁠compact:bool -> t -> Unix.file_descr -> unit
val set_flags : t -> Flags.t -> bool -> unit
val flags : t -> Flags.t
val set_map_size : t -> int -> unit
val path : t -> string
val fd : t -> Unix.file_descr
val stat : t -> Mdb.stat
val info : t -> Mdb.envinfo
val max_readers : t -> int
val max_keysize : t -> int
val reader_list : t -> string list
val reader_check : t -> int