aidp-object-storage — OCI Object Storage native (oci://)

Read and write Object Storage data directly from Spark. The AIDP cluster's IAM identity is used automatically — no OCI_CONFIG, no API keys, no inline PEM.

When to use

• Land or read CSV / Parquet / JSON / Avro / Delta files in an OCI bucket from Spark.
• Register an External Volume (/Volumes/...) backed by an OCI bucket.
• Define an External Table (USING CSV/PARQUET/...) over an oci:// path.
• Mentioned: "oci://", "Object Storage bucket", "external volume", "external table".

When NOT to use

• For Iceberg tables on OCI Object Storage → use aidp-iceberg.
• For AWS S3 → use aidp-aws-s3.
• For Azure ADLS Gen2 → use aidp-azure-adls.

URI form

oci://<bucket>@<namespace>/<path>

The namespace is the tenancy's Object Storage namespace (OCI Console > Object Storage > Bucket Details).

Direct read/write

oci_path = "oci://my-bucket@mynamespace/folder/file"

# Write
df.write.mode("overwrite").option("header", True).format("csv").save(oci_path)

# Read
df_read = spark.read.option("header", True).format("csv").load(oci_path)
df_read.show()

Same pattern with format("parquet"), format("json"), format("delta").

External Volume (DDL)

Mount a bucket once, reference by Volume path forever:

CREATE EXTERNAL VOLUME IF NOT EXISTS default.default.ext_volume
LOCATION 'oci://my-bucket@mynamespace/';

Then:

volume_path = "/Volumes/default/default/ext_volume/folder/file"
df.write.format("csv").option("header", True).save(volume_path)
spark.read.option("header", True).format("csv").load(volume_path).show()

Drop with DROP VOLUME default.default.ext_volume.

External Table (DDL)

Register a table whose data lives in oci://:

CREATE TABLE IF NOT EXISTS default.default.ext_table (name STRING, age INT)
USING CSV
OPTIONS (path='oci://my-bucket@mynamespace/folder/file', delimiter=',', header='true');

Query like any Spark table:

spark.sql("SELECT * FROM default.default.ext_table").show()

Drop with DROP TABLE default.default.ext_table.

Gotchas

• Auth is implicit — the AIDP cluster's IAM identity is used. The user never types OCI keys. If reads fail with 404/403, the workspace identity lacks bucket privileges; fix in OCI IAM.
• Namespace ≠ tenancy name. The Object Storage namespace is a separate, immutable string. Find it in OCI Console > Profile > Tenancy: <tenancy_name> — the object_storage_namespace field.
• External volume path is /Volumes/<catalog>/<schema>/<volume>/..., NOT oci://.... Once a volume is registered, address files via the Volume path.
• External table path option uses oci:// directly, not the Volume path. Both work; choose based on whether you want a re-mountable abstraction (Volume) or a simple direct reference (Table).
• /Workspace/... is NOT for data. It's a FUSE-mounted file system intended for notebooks/configs. For data files use oci:// or /Volumes/....

References

• Official sample: oracle-samples/oracle-aidp-samples → getting-started/Access_Object_Storage_Data.ipynb