Remove disk storages

CHANGELOG.md

@@ -6,7 +6,6 @@
 
 - Adds command buffers support for deferred structural operations (#670).
 - Adds the possibility to specify that a query column is read-only (#677).
-- Adds `DiskVector` and `DiskStructArray` to use the disk for components in very large simulations (#656).
 - Adds `GPUVector{:CPU}` and `GPUStructArray{:CPU}` to use a GPU storage on devices
   which do not have a GPU (#701).
 - Adds the `boxed` keyword argument to the world constructor, which cuts the compilation cost of Ark, at the price of some slowdown in performance.

Project.toml

@@ -6,9 +6,7 @@ authors = ["Martin Lange <martin_lange_@gmx.net>", "Adriano Meligrana <adriano.m
 [deps]
 Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
 FieldViews = "ff5a1669-b1f2-423e-bbd7-b7fa0f7e0224"
-FileWatching = "7b1f6079-737a-58dc-b8bc-7a2ca5c1b5ee"
 FunctionWrappers = "069b7b12-0de2-55c6-9aab-29f3d0a68a2e"
-Mmap = "a63ad114-7e13-5084-954f-fe012c677804"
 PrecompileTools = "aea7be01-6a6a-4083-8856-8a6e6704d82a"
 Preferences = "21216c6a-2e73-6563-6e65-726566657250"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
@@ -37,10 +35,8 @@ Adapt = "4"
 AMDGPU = "2"
 CUDA = "5, 6"
 FieldViews = "0.3.2"
-FileWatching = "1"
 FunctionWrappers = "1"
 Metal = "1"
-Mmap = "1"
 Mooncake = "0.4, 0.5"
 oneAPI = "2"
 OpenCL = "0.10"

docs/src/api.md

@@ -64,8 +64,6 @@ set_relations!
 ```@docs
 Storage
 StructArray
-DiskVector
-DiskStructArray
 GPUVector
 GPUStructArray
 ```

docs/src/manual/components.md

@@ -140,23 +140,6 @@ For these columns, Ark offers storage types for both CPU anf GPU computing by de
   - ≈10-20% runtime overhead for component operations and entity creation.
   - Slower component access with [get_components](@ref get_components(::World, ::Entity, ::Tuple)) and [set_components!](@ref set_components!(::World, ::Entity, ::Tuple)).
 
-#### Disk-Backed Storages
-
-- **[DiskVector](@ref) storage** stores components in temporary memory-mapped files on disk.
-  It can be useful for large component columns that cannot be backed by ordinary
-  Julia heap arrays. [DiskVector](@ref) is working storage, not persistent world serialization:
-  files are managed by Ark and removed automatically when the storage is garbage-collected.
-  [DiskVector](@ref) storage has some limitations:
-  - Only allowed for isbits component types.
-  - Not allowed for zero-size component types, like label components.
-
-- **[DiskStructArray](@ref) storage** stores components in an SoA data structure like
-  [StructArray](@ref), with each field vector backed by a [DiskVector](@ref).
-  It combines the field-vector access of [StructArray](@ref) storage in [queries](@ref Queries)
-  with the out-of-core storage of [DiskVector](@ref).
-  The limitations of both [StructArray](@ref) and [DiskVector](@ref) storage apply,
-  with the isbits and nonzero-size requirements holding for each field of the component.
-
 ### GPU Storages
 
 #### Unified Memory Storages
@@ -174,7 +157,7 @@ The storage mode can be selected per component type by using the [Storage](@ref)
 world = World(
     Position => Storage{Vector},
     Velocity => Storage{StructArray},
-    Health => Storage{DiskVector},
+    Health,
 )
 
 # output

src/Ark.jl

@@ -2,15 +2,12 @@ module Ark
 
 using Adapt
 using FieldViews
-using FileWatching
-using Mmap
 using Preferences
 using StaticArrays
 using FunctionWrappers: FunctionWrapper
 using Random
 
 const THREAD_SAFE_LOCK = @load_preference("THREAD_SAFE_LOCK", default = "true")
-const TMP_ARK_DIR = @load_preference("TMP_ARK_DIR", default = joinpath(@__DIR__, "tmp_ark"))
 
 isdefined(@__MODULE__, :Memory) || const Memory = Vector # Compat for Julia < 1.11
 
@@ -22,8 +19,6 @@ include("collections.jl")
 include("structarray.jl")
 include("gpu_vector.jl")
 include("gpu_structarray.jl")
-include("disk_vector.jl")
-include("disk_structarray.jl")
 include("structarray_interface.jl")
 include("fieldsview.jl")
 include("entity.jl")
@@ -53,11 +48,6 @@ include("unchecked.jl")
 include("command_buffer.jl")
 !_is_testing() && include("precompile.jl")
 
-function __init__()
-    _sweep_stale_ark_sessions!()
-    return nothing
-end
-
 #include("docs.jl") # doctest setup
 
 export World
@@ -96,6 +86,6 @@ export SetComponentsCommand, SetRelationsCommand
 
 export Relation
 
-export Storage, StructArray, GPUStructArray, GPUVector, DiskVector, DiskStructArray
+export Storage, StructArray, GPUStructArray, GPUVector
 
 end

src/abstract.jl

@@ -28,8 +28,8 @@ struct Relation{T} end
     Storage{T}
 
 Marks component types for using `T` as a [storage](@ref component-storages) in the
-world constructor. Built-in storages include `Vector`, `StructArray`, `DiskVector`,
-`DiskStructArray`, `GPUVector` and `GPUStructArray`.
+world constructor. Built-in storages include `Vector`, `StructArray`, `GPUVector`
+and `GPUStructArray`.
 
 If, during world construction, the storage mode is not specified, it defaults to `Storage{Vector}`.