Database-Backed Model Repository

Create a model repository object as shown:

opg4j> var mr = analyst.modelRepository().db().open()
mr ==> oracle.pgx.api.mllib.DbModelRepository@5aac6f9f

DbModelRepository mr = analyst.modelRepository().db().open();

>>> mr = analyst.model_repository().db()
>>> mr
<pypgx.api.mllib._model_repo.ModelRepository object at 0x7f637496df60>

The preceding example assumes that you are creating the model repository from the current logged in database. If you must create the repository in a different database, then refer to the following example:

opg4j> var mr = analyst.modelRepository().db(). 
...>                          username("<username>").   // DB user to use for storing the model
...>                          password("<password>").   // password of the DB user
...>                          jdbcUrl("<jdbcUrl>").     // jdbc url to the DB
...>                          open()

DbModelRepository mr = analyst.modelRepository().db() 
                               .username("<username>")   // DB user to use for storing the model
                               .password("<password>")  // password of the DB user
                               .jdbcUrl("<jdbcUrl>")   // jdbc url to the DB
                               .open();

>>> mr = analyst.model_repository().db(username = "<username>", # DB user to use for storing the model
...                               password = "<password>", # password of the DB user
...                               jdbc_url = "<jdbc_url>") # jdbc url to the DB

Create a model store as shown:

opg4j> var modelstore = "modelstore"
modelstore ==> "modelstore"
opg4j> mr.create(modelstore)

String modelstore = "modelstore";
mr.create(modelstore);

>>> mr.create("modelstore")

List the model store as shown and verify that the model store is empty:

opg4j> mr.listModelStoresNames()
$4 ==> [DW, deepwalk_model, modelstore, modelstoretablename]
opg4j> mr.listModelStoresNamesMatching(modelstore)
$5 ==> [modelstore, modelstoretablename]
opg4j> mr.listModels(modelstore)
$6 ==> []

mr.listModelStoresNames();
mr.listModelStoresNamesMatching(modelstore);
mr.listModels(modelstore);

>>> mr.list_model_stores_names()
>>> mr.list_model_stores_names_matching("modelstore")
>>> mr.list_models("modelstore")

Create and fit a DeepWalk model as shown:

opg4j> var walkLength = 5
opg4j> var walksPerVertex = 4
opg4j> var embeddingSize = 20
opg4j> var batchSize = 128
opg4j> var model = analyst.deepWalkModelBuilder()
                          .setLayerSize(embeddingSize)
                          .setWalkLength(walkLength)
                          .setWalksPerVertex(walksPerVertex)
                          .setValidationFraction(1)
                          .setBatchSize(batchSize).build()
model ==> oracle.pgx.api.mllib.DeepWalkModel@34be7efb
opg4j> var smallGraphDeepWalk = session.readGraphByName("<graph_name>",GraphSource.PG_VIEW)
smallGraphDeepWalk ==> PgxGraph[name=BANK_GRAPH_VIEW_2,N=1000,E=5001,created=1649075718843]
opg4j> model.fit(smallGraphDeepWalk)

import oracle.pgx.api.mllib.DeepWalkModel;
int walkLength = 5;
int walksPerVertex = 4;
int embeddingSize = 20;
int batchSize = 128;
DeepWalkModel model = analyst.deepWalkModelBuilder()
                          .setLayerSize(embeddingSize)
                          .setWalkLength(walkLength)
                          .setWalksPerVertex(walksPerVertex)
                          .setValidationFraction(1)
                          .setBatchSize(batchSize).build();
PgxGraph smallGraphDeepWalk = session.readGraphByName("<graph_name>",GraphSource.PG_VIEW);
model.fit(smallGraphDeepWalk);

>>> model = analyst.deepwalk_builder(window_size=3,walks_per_vertex=6,walk_length=4)
graph = session.read_graph_by_name("<graph_name>", 'pg_view')
>>> model.fit(graph)

Store the trained model in the model store as shown:

opg4j> var modelName = "DeepWalkModel"
opg4j> var modelStorer = model.export().db()
modelStorer ==> oracle.pgx.api.mllib.DbModelStorer@1e86b2d1
opg4j> modelStorer.modelstore(modelstore)
                  .overwrite(true).modelname(modelName)
                  .description("DeepWalk: model desc")
                  .store()

import oracle.pgx.api.mllib.DbModelStorer;
import oracle.pgx.api.mllib.DbModelLoader;

String modelName = "DeepWalkModel";
DbModelStorer<DeepWalkModel> modelStorer = model.export().db();
modelStorer.modelstore(modelstore)
           .overwrite(true).modelname(modelName)
           .description("DeepWalk: model desc")
           .store();

>>> model.export().db(model_store = "modelstore", model_name = "DeepWalkModel",
...                model_description = "DeepWalk model description")

Verify that the model is now stored in the model store as shown:

opg4j> mr.listModels(modelstore)
$11 ==> [DeepWalkModel]

mr.listModels(modelstore);

>>> mr.list_models("modelstore")

Load the model from the model store as shown:

opg4j> var modelLoader = analyst.loadDeepWalkModel().db()
opg4j> var reloadedModel = modelLoader.
                                 modelstore(modelstore).
                                 modelname(modelName).
                                 load()
reloadedModel ==> oracle.pgx.api.mllib.DeepWalkModel@4248608d

DbModelLoader<DeepWalkModel> modelLoader = analyst.loadDeepWalkModel().db();
DeepWalkModel reloadedModel = modelLoader.modelstore(modelstore)
                                         .modelname(modelName)
                                         .load();

>>> analyst.get_deepwalk_model_loader().db(model_store = "modelstore",
                                   model_name = "DeepWalkModel")
DeepWalkModel

The preceding example assumes that you are loading the model from the current logged in database. If you must load the model from a different database then refer to the example in Loading a Pre-Trained Model From Another Database.

Get the model description from the model store as shown:

opg4j> mr.getModelDescription(modelstore,modelName)
$14 ==> "DeepWalk: model desc"

mr.getModelDescription(modelstore,modelName);

>>> mr.get_model_description("modelstore","DeepWalkModel")
'DeepWalk model description'

Delete the model from the model store as shown:

opg4j> mr.deleteModel(modelstore,modelName)

mr.deleteModel(modelstore,modelName);

>>> mr.delete_model("modelstore","DeepWalkModel")

Delete the model store as shown:

opg4j> mr.deleteModelStore(modelstore)

mr.deleteModelStore(modelstore);

>>>     ("modelstore")