A package for dynamically checkpointing program state
Author invenia
2 Stars
Updated Last
4 Months Ago
Started In
December 2020


stable build status coverage

Checkpoints.jl allows packages to register checkpoints which can serialize objects to disk during the execution of an application program, if the application program configures them.

A minimal working example consists of the package:

module MyPackage

using Checkpoints

MODULE = "MyPackage"

__init__() = Checkpoints.register(MODULE, ["foo", ])

function foo(x)
    with_checkpoint_tags(:foo1 => 1, :foo2 => 2) do
        checkpoint(MODULE, "foo", :data => 2x)
    return 2x


and the application program:

using Checkpoints

Checkpoints.config("", "./path/to/checkpoints")

for i in 1:2
    with_checkpoint_tags(:iteration => i) do

which results in recorded checkpoints at


You can use index_checkpoint_files to get an index of the files, which is a Tables.jl table and so can e.g. be passed to DataFrame (and then you can do things like groupby etc):

julia> using DataFrames

julia> DataFrame(index_checkpoint_files("./path/to/checkpoints/"))
2×6 DataFrame
 Row │ prefixes        checkpoint_name  iteration   foo1        foo2        checkpoint_path
     │ Tuple…          SubString…       SubString…  SubString…  SubString…  PosixPath…
   1 │ ("MyPackage",)  foo              1           1           2           ./path/to/checkpoints/iteration=2 │ ("MyPackage",)  foo              2           1           2           ./path/to/checkpoints/iteration=

or worked with directly:

julia> [checkpoint_path(out) for out in index_checkpoint_files("./path/to/checkpoints/") if out.iteration=="1"]
1-element Array{FilePathsBase.PosixPath,1}:

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