Asynchronous Optimization via Grid Search
Source:R/OptimizerAsyncGridSearch.R
mlr_optimizers_async_grid_search.RdOptimizerAsyncGridSearch class that implements a grid search.
The grid is constructed as a Cartesian product over discretized values per parameter, see paradox::generate_design_grid().
The points of the grid are evaluated in a random order.
Source
Bergstra J, Bengio Y (2012). “Random Search for Hyper-Parameter Optimization.” Journal of Machine Learning Research, 13(10), 281–305. https://jmlr.csail.mit.edu/papers/v13/bergstra12a.html.
Dictionary
This Optimizer can be instantiated via the dictionary
mlr_optimizers or with the associated sugar function opt():
Super classes
bbotk::Optimizer -> bbotk::OptimizerAsync -> OptimizerAsyncGridSearch
Methods
Inherited methods
Examples
# example only runs if a Redis server is available
if (mlr3misc::require_namespaces(c("rush", "redux", "mirai"), quietly = TRUE) &&
redux::redis_available()) {
# define the objective function
fun = function(xs) {
list(y = - (xs[[1]] - 2)^2 - (xs[[2]] + 3)^2 + 10)
}
# set domain
domain = ps(
x1 = p_dbl(-10, 10),
x2 = p_dbl(-5, 5)
)
# set codomain
codomain = ps(
y = p_dbl(tags = "maximize")
)
# create objective
objective = ObjectiveRFun$new(
fun = fun,
domain = domain,
codomain = codomain,
properties = "deterministic"
)
# start workers
rush::rush_plan(worker_type = "mirai")
mirai::daemons(1)
# initialize instance
instance = oi_async(
objective = objective,
terminator = trm("evals", n_evals = 20)
)
# load optimizer
optimizer = opt("async_grid_search", resolution = 10)
# trigger optimization
optimizer$optimize(instance)
# all evaluated configurations
instance$archive
# best performing configuration
instance$archive$best()
# covert to data.table
as.data.table(instance$archive)
}
#> state x1 x2 y timestamp_xs
#> <char> <num> <num> <num> <POSc>
#> 1: finished -10.000000 -5.0000000 -138.00000 2026-04-10 10:49:09
#> 2: finished -10.000000 -3.8888889 -134.79012 2026-04-10 10:49:09
#> 3: finished -10.000000 -2.7777778 -134.04938 2026-04-10 10:49:09
#> 4: finished -10.000000 -1.6666667 -135.77778 2026-04-10 10:49:09
#> 5: finished -10.000000 -0.5555556 -139.97531 2026-04-10 10:49:09
#> 6: finished -10.000000 0.5555556 -146.64198 2026-04-10 10:49:09
#> 7: finished -10.000000 1.6666667 -155.77778 2026-04-10 10:49:09
#> 8: finished -10.000000 2.7777778 -167.38272 2026-04-10 10:49:09
#> 9: finished -10.000000 3.8888889 -181.45679 2026-04-10 10:49:09
#> 10: finished -10.000000 5.0000000 -198.00000 2026-04-10 10:49:09
#> 11: finished -7.777778 -5.0000000 -89.60494 2026-04-10 10:49:09
#> 12: finished -7.777778 -3.8888889 -86.39506 2026-04-10 10:49:09
#> 13: finished -7.777778 -2.7777778 -85.65432 2026-04-10 10:49:09
#> 14: finished -7.777778 -1.6666667 -87.38272 2026-04-10 10:49:09
#> 15: finished -7.777778 -0.5555556 -91.58025 2026-04-10 10:49:09
#> 16: finished -7.777778 0.5555556 -98.24691 2026-04-10 10:49:09
#> 17: finished -7.777778 1.6666667 -107.38272 2026-04-10 10:49:09
#> 18: finished -7.777778 2.7777778 -118.98765 2026-04-10 10:49:09
#> 19: finished -7.777778 3.8888889 -133.06173 2026-04-10 10:49:09
#> 20: finished -7.777778 5.0000000 -149.60494 2026-04-10 10:49:09
#> 21: failed 10.000000 5.0000000 NA 2026-04-10 10:49:09
#> 22: failed 10.000000 3.8888889 NA 2026-04-10 10:49:09
#> 23: failed 10.000000 2.7777778 NA 2026-04-10 10:49:09
#> 24: failed 10.000000 1.6666667 NA 2026-04-10 10:49:09
#> 25: failed 10.000000 0.5555556 NA 2026-04-10 10:49:09
#> 26: failed 10.000000 -0.5555556 NA 2026-04-10 10:49:09
#> 27: failed 10.000000 -1.6666667 NA 2026-04-10 10:49:09
#> 28: failed 10.000000 -2.7777778 NA 2026-04-10 10:49:09
#> 29: failed 10.000000 -3.8888889 NA 2026-04-10 10:49:09
#> 30: failed 10.000000 -5.0000000 NA 2026-04-10 10:49:09
#> 31: failed 7.777778 5.0000000 NA 2026-04-10 10:49:09
#> 32: failed 7.777778 3.8888889 NA 2026-04-10 10:49:09
#> 33: failed 7.777778 2.7777778 NA 2026-04-10 10:49:09
#> 34: failed 7.777778 1.6666667 NA 2026-04-10 10:49:09
#> 35: failed 7.777778 0.5555556 NA 2026-04-10 10:49:09
#> 36: failed 7.777778 -0.5555556 NA 2026-04-10 10:49:09
#> 37: failed 7.777778 -1.6666667 NA 2026-04-10 10:49:09
#> 38: failed 7.777778 -2.7777778 NA 2026-04-10 10:49:09
#> 39: failed 7.777778 -3.8888889 NA 2026-04-10 10:49:09
#> 40: failed 7.777778 -5.0000000 NA 2026-04-10 10:49:09
#> 41: failed 5.555556 5.0000000 NA 2026-04-10 10:49:09
#> 42: failed 5.555556 3.8888889 NA 2026-04-10 10:49:09
#> 43: failed 5.555556 2.7777778 NA 2026-04-10 10:49:09
#> 44: failed 5.555556 1.6666667 NA 2026-04-10 10:49:09
#> 45: failed 5.555556 0.5555556 NA 2026-04-10 10:49:09
#> 46: failed 5.555556 -0.5555556 NA 2026-04-10 10:49:09
#> 47: failed 5.555556 -1.6666667 NA 2026-04-10 10:49:09
#> 48: failed 5.555556 -2.7777778 NA 2026-04-10 10:49:09
#> 49: failed 5.555556 -3.8888889 NA 2026-04-10 10:49:09
#> 50: failed 5.555556 -5.0000000 NA 2026-04-10 10:49:09
#> 51: failed 3.333333 5.0000000 NA 2026-04-10 10:49:09
#> 52: failed 3.333333 3.8888889 NA 2026-04-10 10:49:09
#> 53: failed 3.333333 2.7777778 NA 2026-04-10 10:49:09
#> 54: failed 3.333333 1.6666667 NA 2026-04-10 10:49:09
#> 55: failed 3.333333 0.5555556 NA 2026-04-10 10:49:09
#> 56: failed 3.333333 -0.5555556 NA 2026-04-10 10:49:09
#> 57: failed 3.333333 -1.6666667 NA 2026-04-10 10:49:09
#> 58: failed 3.333333 -2.7777778 NA 2026-04-10 10:49:09
#> 59: failed 3.333333 -3.8888889 NA 2026-04-10 10:49:09
#> 60: failed 3.333333 -5.0000000 NA 2026-04-10 10:49:09
#> 61: failed 1.111111 5.0000000 NA 2026-04-10 10:49:09
#> 62: failed 1.111111 3.8888889 NA 2026-04-10 10:49:09
#> 63: failed 1.111111 2.7777778 NA 2026-04-10 10:49:09
#> 64: failed 1.111111 1.6666667 NA 2026-04-10 10:49:09
#> 65: failed 1.111111 0.5555556 NA 2026-04-10 10:49:09
#> 66: failed 1.111111 -0.5555556 NA 2026-04-10 10:49:09
#> 67: failed 1.111111 -1.6666667 NA 2026-04-10 10:49:09
#> 68: failed 1.111111 -2.7777778 NA 2026-04-10 10:49:09
#> 69: failed 1.111111 -3.8888889 NA 2026-04-10 10:49:09
#> 70: failed 1.111111 -5.0000000 NA 2026-04-10 10:49:09
#> 71: failed -1.111111 5.0000000 NA 2026-04-10 10:49:09
#> 72: failed -1.111111 3.8888889 NA 2026-04-10 10:49:09
#> 73: failed -1.111111 2.7777778 NA 2026-04-10 10:49:09
#> 74: failed -1.111111 1.6666667 NA 2026-04-10 10:49:09
#> 75: failed -1.111111 0.5555556 NA 2026-04-10 10:49:09
#> 76: failed -1.111111 -0.5555556 NA 2026-04-10 10:49:09
#> 77: failed -1.111111 -1.6666667 NA 2026-04-10 10:49:09
#> 78: failed -1.111111 -2.7777778 NA 2026-04-10 10:49:09
#> 79: failed -1.111111 -3.8888889 NA 2026-04-10 10:49:09
#> 80: failed -1.111111 -5.0000000 NA 2026-04-10 10:49:09
#> 81: failed -3.333333 5.0000000 NA 2026-04-10 10:49:09
#> 82: failed -3.333333 3.8888889 NA 2026-04-10 10:49:09
#> 83: failed -3.333333 2.7777778 NA 2026-04-10 10:49:09
#> 84: failed -3.333333 1.6666667 NA 2026-04-10 10:49:09
#> 85: failed -3.333333 0.5555556 NA 2026-04-10 10:49:09
#> 86: failed -3.333333 -0.5555556 NA 2026-04-10 10:49:09
#> 87: failed -3.333333 -1.6666667 NA 2026-04-10 10:49:09
#> 88: failed -3.333333 -2.7777778 NA 2026-04-10 10:49:09
#> 89: failed -3.333333 -3.8888889 NA 2026-04-10 10:49:09
#> 90: failed -3.333333 -5.0000000 NA 2026-04-10 10:49:09
#> 91: failed -5.555556 5.0000000 NA 2026-04-10 10:49:09
#> 92: failed -5.555556 3.8888889 NA 2026-04-10 10:49:09
#> 93: failed -5.555556 2.7777778 NA 2026-04-10 10:49:09
#> 94: failed -5.555556 1.6666667 NA 2026-04-10 10:49:09
#> 95: failed -5.555556 0.5555556 NA 2026-04-10 10:49:09
#> 96: failed -5.555556 -0.5555556 NA 2026-04-10 10:49:09
#> 97: failed -5.555556 -1.6666667 NA 2026-04-10 10:49:09
#> 98: failed -5.555556 -2.7777778 NA 2026-04-10 10:49:09
#> 99: failed -5.555556 -3.8888889 NA 2026-04-10 10:49:09
#> 100: failed -5.555556 -5.0000000 NA 2026-04-10 10:49:09
#> state x1 x2 y timestamp_xs
#> <char> <num> <num> <num> <POSc>
#> worker_id timestamp_ys keys
#> <char> <POSc> <char>
#> 1: sinking_raccoon 2026-04-10 10:49:10 6912aa8a-8a13-480f-a128-e1320f95de4f
#> 2: sinking_raccoon 2026-04-10 10:49:10 79ec7fdc-6e56-48ae-9783-bbf0970cae49
#> 3: sinking_raccoon 2026-04-10 10:49:10 6d3b1117-3670-4d11-b6c4-5f101d47e185
#> 4: sinking_raccoon 2026-04-10 10:49:10 9d3a0e24-1c35-4576-9d91-464b6275fa0f
#> 5: sinking_raccoon 2026-04-10 10:49:10 3a1f4188-b54f-41b7-9aba-18712efdcd7c
#> 6: sinking_raccoon 2026-04-10 10:49:10 0648d2ae-dc45-4fa0-847b-ed81301a407e
#> 7: sinking_raccoon 2026-04-10 10:49:10 8dec0f61-06b5-449d-bba7-4c564d8d85bb
#> 8: sinking_raccoon 2026-04-10 10:49:10 7aa74f38-f52c-4fd0-be20-c98bf7fcde55
#> 9: sinking_raccoon 2026-04-10 10:49:10 2c6028e9-03e0-499b-b5bf-6a5dfc9c1ca7
#> 10: sinking_raccoon 2026-04-10 10:49:10 8f9737f5-adfc-42fd-b5e4-332386b7ec9f
#> 11: sinking_raccoon 2026-04-10 10:49:10 aa9e7bae-0cdf-4af9-979d-4379187be0a6
#> 12: sinking_raccoon 2026-04-10 10:49:10 46cbbe1a-7592-4fa0-b324-adafb4982fca
#> 13: sinking_raccoon 2026-04-10 10:49:10 69a33d36-5c13-4aee-a8d3-3c4038fd9cd3
#> 14: sinking_raccoon 2026-04-10 10:49:10 2a3a708a-3d89-494b-81c7-77683efaa627
#> 15: sinking_raccoon 2026-04-10 10:49:10 1e27cd9b-045f-4b00-82e0-f851455cee34
#> 16: sinking_raccoon 2026-04-10 10:49:10 8a5cdb9c-cac9-4d4d-a345-9e1f5e114fa3
#> 17: sinking_raccoon 2026-04-10 10:49:10 604e7b5e-15a4-4505-bf95-5507a9aa5621
#> 18: sinking_raccoon 2026-04-10 10:49:10 4637a7ee-000e-4722-a244-081144cc461d
#> 19: sinking_raccoon 2026-04-10 10:49:10 c7981691-4b30-4163-9eaf-211c386a1cf3
#> 20: sinking_raccoon 2026-04-10 10:49:10 b36f45d0-c457-4fe0-913b-4ce391d8db1c
#> 21: <NA> <NA> 05ccabac-0acd-492c-b14f-3eccef0d8d39
#> 22: <NA> <NA> 999f9a1f-708b-4bf8-a165-9f1506597897
#> 23: <NA> <NA> d8513c60-afb9-4bc8-9a3a-4b30d7d0fb2f
#> 24: <NA> <NA> 42a68f24-b01e-4168-95d6-cedbec590314
#> 25: <NA> <NA> fec90d38-4832-479d-a829-8488ff6bfa20
#> 26: <NA> <NA> ca030c05-a8f2-46c5-837d-829ff4222a0c
#> 27: <NA> <NA> 44adc4bf-0683-4222-8478-f5a37486808c
#> 28: <NA> <NA> 4f738eaf-523b-444e-a301-611e4e4d737c
#> 29: <NA> <NA> 7cd63e6c-c44b-44be-bb11-b90885c58376
#> 30: <NA> <NA> bcc38761-df6c-4e68-beee-89d9d6f26d73
#> 31: <NA> <NA> cf094aa0-49ec-4674-9af2-a449193a99cc
#> 32: <NA> <NA> 449b1e1b-1ffc-4212-a7bf-245b76f7edc2
#> 33: <NA> <NA> 8a9d72fa-3268-48c7-a4c7-8d410bec7caa
#> 34: <NA> <NA> d02acadf-f773-44d2-941d-64e712e847a9
#> 35: <NA> <NA> 57e086f6-c9d3-4aa1-b987-d6ad79667865
#> 36: <NA> <NA> 95aea5be-d64c-45ab-9041-67f2db7e143a
#> 37: <NA> <NA> 5c3291c4-8939-444a-b733-fbc7825938fd
#> 38: <NA> <NA> 18b17afb-526d-43ed-b7cd-ad3694a5938b
#> 39: <NA> <NA> 82927b95-1555-4e5d-b783-157f0319256d
#> 40: <NA> <NA> 2c8431aa-c298-45a4-ae2f-468bda7782e6
#> 41: <NA> <NA> 8675609e-a844-4ad2-97cd-d4236f9b9a25
#> 42: <NA> <NA> 4438837f-814f-40d8-acfa-aae8510117b6
#> 43: <NA> <NA> 17ce2893-f072-4f98-9500-c388cc0bd790
#> 44: <NA> <NA> ea8aa338-5473-4d70-a104-612e610674a0
#> 45: <NA> <NA> 1a41146d-ae28-4d92-abc0-4e38f00da9e1
#> 46: <NA> <NA> a6e520e0-d1a9-4b48-9ecb-283396333129
#> 47: <NA> <NA> 66c865bc-c6ef-4b90-bcfb-64daf368ede6
#> 48: <NA> <NA> 4c7d6f54-ff4e-4b96-b361-102c081f7746
#> 49: <NA> <NA> 10343b96-a425-4bb7-937c-a01d47e5a7b4
#> 50: <NA> <NA> 159dd9a3-16ee-45b2-8d34-3c54c6d86559
#> 51: <NA> <NA> 0c1777ba-8a3f-40c6-8424-f19c70d3026a
#> 52: <NA> <NA> 17382f6f-490f-4aac-9af5-8a279a3dca14
#> 53: <NA> <NA> 267a872c-20f1-4f0e-a4e0-604b4d6363a5
#> 54: <NA> <NA> 4b9858da-7de4-45ee-8ead-c90e55101678
#> 55: <NA> <NA> bd54e18b-b8df-4f15-9f22-8b9801f3d78c
#> 56: <NA> <NA> 325fca6d-a844-4bb4-8a2c-47bcce8d97c1
#> 57: <NA> <NA> 70e034da-72de-4723-b19a-5d8180485ab4
#> 58: <NA> <NA> 8fbf56d3-59e7-4d63-802e-5227a4d37906
#> 59: <NA> <NA> 7fd4b6d7-7f4c-4aba-b947-8aa3d30c811b
#> 60: <NA> <NA> 35fe77a5-ae07-490a-9678-f442c3152703
#> 61: <NA> <NA> 7b2d04a1-3c97-4695-8ba7-b3987ee798b4
#> 62: <NA> <NA> f6c46cce-57aa-4906-98b6-e8aa9babdc5a
#> 63: <NA> <NA> f2c9bd1a-1342-49fa-8f87-357c51b1ae45
#> 64: <NA> <NA> 809bd1cd-8f71-4107-852c-0305d8ff877e
#> 65: <NA> <NA> b28285d6-4659-433d-8079-bfab93fd26a4
#> 66: <NA> <NA> cade9be1-8d7a-491a-9971-4d8db60a8f74
#> 67: <NA> <NA> e7339762-422a-4162-b4c7-2ec2693bc137
#> 68: <NA> <NA> 5684b22e-cdc3-4e27-8f34-b08bb915833e
#> 69: <NA> <NA> 3e3b6648-e049-44f7-9856-b0a6565a1b70
#> 70: <NA> <NA> 04ee513f-bb8a-44c1-b3af-1de090b3fc72
#> 71: <NA> <NA> 0bfe6752-b0bb-4905-80d4-909c517c150d
#> 72: <NA> <NA> 8a214f8d-f987-43ce-b8f2-050b6a636b0f
#> 73: <NA> <NA> 3b7da4e6-9390-4cb0-84f0-d587326aee86
#> 74: <NA> <NA> 0ccd9494-60d1-486c-bffd-636fce69aeed
#> 75: <NA> <NA> 165c961a-3612-4595-b2ff-f86a06cd203c
#> 76: <NA> <NA> 99b3403d-504d-4545-be56-4a2a3ce3af1c
#> 77: <NA> <NA> 5d5a0018-b660-473f-8b53-78e3bc95e6b3
#> 78: <NA> <NA> 47ca0e23-d825-43d3-a46e-75d39baaaf2d
#> 79: <NA> <NA> 7ab014e2-14be-47dd-88c4-31d958649382
#> 80: <NA> <NA> c2220277-17e4-418c-9c58-f58c123da734
#> 81: <NA> <NA> b54b650d-85d6-4f32-a30f-a5b559d38f6f
#> 82: <NA> <NA> cdfc8eae-5ed3-41a7-bd5c-b0ea4c0921df
#> 83: <NA> <NA> 1a99a6d5-aa70-4e7f-9fbe-d6b0317925c6
#> 84: <NA> <NA> 20f9eb14-528f-48d0-bd4f-278e418b42c0
#> 85: <NA> <NA> b3280dd1-e36b-40e2-828a-41935f88a8e9
#> 86: <NA> <NA> bc50400b-60d5-42ca-9870-02a9e92e00e0
#> 87: <NA> <NA> fc89c75d-5a80-40f8-9309-bdd03f537166
#> 88: <NA> <NA> f4b4049f-d3ee-4acf-a88d-81b77dbeef3b
#> 89: <NA> <NA> a3456286-2967-43bd-84da-8a92f7e8601a
#> 90: <NA> <NA> d146268f-0d1d-430c-ae89-29eb6febc6cf
#> 91: <NA> <NA> 2d824f1b-4763-4edd-962b-f235541ea3d6
#> 92: <NA> <NA> 77b83b19-7549-451e-9970-a2c46b8f811d
#> 93: <NA> <NA> b8b567bf-5f6f-4726-b983-0b4d18aa9869
#> 94: <NA> <NA> 6f87f222-34c1-4067-a3ce-3ecb926d852a
#> 95: <NA> <NA> 1d12dd77-5074-4c1f-b9d2-b575be53d1f9
#> 96: <NA> <NA> f67fc17f-8daf-42e0-a494-0186eb49b6dc
#> 97: <NA> <NA> 264769cb-91e9-40ce-aab2-225a1cb43443
#> 98: <NA> <NA> 9043805b-dffd-4148-a2a6-58b95ee36884
#> 99: <NA> <NA> 7e7738bf-60b5-4a24-be5c-26fc7d302811
#> 100: <NA> <NA> d9ebd7fd-9f47-4732-bfdf-d579e92582d6
#> worker_id timestamp_ys keys
#> <char> <POSc> <char>
#> message x_domain_x1 x_domain_x2
#> <char> <num> <num>
#> 1: <NA> -10.000000 -5.0000000
#> 2: <NA> -10.000000 -3.8888889
#> 3: <NA> -10.000000 -2.7777778
#> 4: <NA> -10.000000 -1.6666667
#> 5: <NA> -10.000000 -0.5555556
#> 6: <NA> -10.000000 0.5555556
#> 7: <NA> -10.000000 1.6666667
#> 8: <NA> -10.000000 2.7777778
#> 9: <NA> -10.000000 3.8888889
#> 10: <NA> -10.000000 5.0000000
#> 11: <NA> -7.777778 -5.0000000
#> 12: <NA> -7.777778 -3.8888889
#> 13: <NA> -7.777778 -2.7777778
#> 14: <NA> -7.777778 -1.6666667
#> 15: <NA> -7.777778 -0.5555556
#> 16: <NA> -7.777778 0.5555556
#> 17: <NA> -7.777778 1.6666667
#> 18: <NA> -7.777778 2.7777778
#> 19: <NA> -7.777778 3.8888889
#> 20: <NA> -7.777778 5.0000000
#> 21: Optimization terminated NA NA
#> 22: Optimization terminated NA NA
#> 23: Optimization terminated NA NA
#> 24: Optimization terminated NA NA
#> 25: Optimization terminated NA NA
#> 26: Optimization terminated NA NA
#> 27: Optimization terminated NA NA
#> 28: Optimization terminated NA NA
#> 29: Optimization terminated NA NA
#> 30: Optimization terminated NA NA
#> 31: Optimization terminated NA NA
#> 32: Optimization terminated NA NA
#> 33: Optimization terminated NA NA
#> 34: Optimization terminated NA NA
#> 35: Optimization terminated NA NA
#> 36: Optimization terminated NA NA
#> 37: Optimization terminated NA NA
#> 38: Optimization terminated NA NA
#> 39: Optimization terminated NA NA
#> 40: Optimization terminated NA NA
#> 41: Optimization terminated NA NA
#> 42: Optimization terminated NA NA
#> 43: Optimization terminated NA NA
#> 44: Optimization terminated NA NA
#> 45: Optimization terminated NA NA
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