Module Nn_blockmap

module Nn_blockmap: sig .. end

Already allocated blocks of this inode. This list should only include blocks of the range immediately preceding the newly allocated range. The algorithm looks then for free blocks in the vicinity.

exception Inactive

type reserve_info = {

ri_blocks : Nn_db.allocinfo list; (* Already allocated blocks of this inode. This list should only include blocks of the range immediately preceding the newly allocated range. The algorithm looks then for free blocks in the vicinity. *)

}

Optional information for block reservations

val create_reserve_info : ?blocks:Nn_db.allocinfo list -> unit -> reserve_info

Creates a reserve_info record

type triv_range = int64 * int64

(startblock, number)

val string_of_trl : triv_range list -> string

For debugging

type owner

val create_owner : unit -> owner

The owner is an opaque ID which is guaranteed to be unique in the whole Netplex system

val string_of_owner : owner -> string

debug string

class type blockmap_t = object .. end

block maps are in-memory representation of the per-datastore bitmaps whether blocks are used or free.

class blockmap : id:int -> identity:string -> size:int64 -> blockmap_t

Create a blockmap for DB row id and datastore identity, with an initial size.

val blockmap_from_db_e : id:int ->
       identity:string ->
       size:int64 ->
       Pfs_db.ro_async_connection ->
       Unixqueue.event_system -> blockmap_t Uq_engines.engine

Create a blockmap object, and initialize it from the blockalloc db table

val fill_blockmap : blockmap_t -> unit

Fills the blockmap from db (synchronous)

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