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Using Object Storage in Yandex Managed Service for Apache Spark™

Written by
Updated at September 23, 2025

In Yandex Object Storage buckets, you can store both files required to run jobs in a Yandex Managed Service for Apache Spark™ cluster and the results of those jobs.

To use Object Storage in Managed Service for Apache Spark™:

  1. Set up your infrastructure.
  2. Prepare a PySpark job.
  3. Check the result.

If you no longer need the resources you created, delete them.

The support cost for this solution includes:

Set up the infrastructure

  1. Create a service account named spark-agent for the Apache Spark™ cluster and assign it the managed-spark.integrationProvider role to enable the Apache Spark™ cluster to interact with other resources.

  2. Create buckets:

    • <bucket_for_PySpark_job_source_code>.
    • <bucket_for_PySpark_job_output_data>.

  3. Grant permissions to the spark-agent service account for the created buckets:

    • <bucket_for_PySpark_job_source_code>: READ permission.
    • <bucket_for_PySpark_job_output_data>: READ and WRITE permission.

  4. Create a cloud network named spark-network.

    This will automatically create three subnets in different availability zones.

  5. Create a Managed Service for Apache Spark™ cluster with the following parameters:

    • Service account: spark-agent
    • Network: spark-network
    • Subnet: spark-network-ru-central1-a

Prepare a PySpark job

For a PySpark job, we will use a Python script that is stored in the Object Storage bucket and creates a table named table_1 in database_1. Prepare a script file:

  1. Create a local file named job_save_table.py and paste the following script to it:

    job_save_table.py
    import random
import sys
from pyspark.sql import SparkSession


def prepare_table(spark, database, table):
    create_database_sql = "create database if not exists {database}"
    create_table_sql = """
    create table if not exists {database}.{table} (
        id int,
        value double
    )
    """
    truncate_table_sql = "truncate table {database}.{table}"

    spark.sql(create_database_sql.format(database=database))
    spark.sql(create_table_sql.format(database=database, table=table))
    spark.sql(truncate_table_sql.format(database=database, table=table))


def write_data(spark, database, table):
    data = [(i, random.random()) for i in range(100_000)]
    # Creating a dataframe
    df = spark.createDataFrame(data, schema=['id', 'value'])
    table_full_name = "{database}.{table}".format(database=database, table=table)
    df.write.mode('overwrite').format('json').saveAsTable(table_full_name)


def main():
    # Creating a Spark session
    spark = (
        SparkSession
        .builder
        .appName('job_save_table')
        .config('spark.executor.instances', 1)
        .config('spark.sql.warehouse.dir', sys.argv[1])
        .config('spark.sql.catalogImplementation', 'hive')
        .getOrCreate()
    )
    database, table = 'database_1', 'table_1'
    prepare_table(spark, database, table)
    write_data(spark, database, table)


if __name__ == '__main__':
    if len(sys.argv) != 2:
        print("Usage: job-save-table s3a://<bucket>/<folder>", file=sys.stderr)
        sys.exit(-1)
    main()

  2. In <bucket_for_PySpark_job_source_code>, create a folder named scripts and upload the job_save_table.py file to it.

  3. Create a job with the following settings:

    • Job type: PySpark
    • Main python file: s3a://<bucket_for_PySpark_job_source_code>/scripts/job_save_table.py
    • Arguments: s3a://<bucket_for_PySpark_job_output_data>/warehouse

Check the result

  1. Navigate to the folder dashboard and select Managed Service for Apache Spark™.
  2. Click the name of your cluster and open the Jobs tab.
  3. Wait for the PySpark job you created to change its status to Done.
  4. Make sure the warehouse folder in <bucket_for_PySpark_job_output_data> now contains database_1. The data from the new DB is now stored in the Object Storage bucket in JSON format.

Delete the resources you created

Some resources are not free of charge. Delete the resources you no longer need to avoid paying for them:

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