Oracle Object Storage

Oracle Object Storage Overview

Oracle Object Storage FAQ

Paths are specified as remote:bucket (or remote: for the lsd command.) You may put subdirectories in too, e.g. remote:bucket/path/to/dir.


Here is an example of making an oracle object storage configuration. rclone config walks you through it.

Here is an example of how to make a remote called remote. First run:

 rclone config

This will guide you through an interactive setup process:

n) New remote
d) Delete remote
r) Rename remote
c) Copy remote
s) Set configuration password
q) Quit config
e/n/d/r/c/s/q> n

Enter name for new remote.
name> remote

Option Storage.
Type of storage to configure.
Choose a number from below, or type in your own value.
XX / Oracle Cloud Infrastructure Object Storage
   \ (oracleobjectstorage)
Storage> oracleobjectstorage

Option provider.
Choose your Auth Provider
Choose a number from below, or type in your own string value.
Press Enter for the default (env_auth).
 1 / automatically pickup the credentials from runtime(env), first one to provide auth wins
   \ (env_auth)
   / use an OCI user and an API key for authentication.
 2 | you’ll need to put in a config file your tenancy OCID, user OCID, region, the path, fingerprint to an API key.
   | https://docs.oracle.com/en-us/iaas/Content/API/Concepts/sdkconfig.htm
   \ (user_principal_auth)
   / use instance principals to authorize an instance to make API calls. 
 3 | each instance has its own identity, and authenticates using the certificates that are read from instance metadata. 
   | https://docs.oracle.com/en-us/iaas/Content/Identity/Tasks/callingservicesfrominstances.htm
   \ (instance_principal_auth)
 4 / use resource principals to make API calls
   \ (resource_principal_auth)
 5 / no credentials needed, this is typically for reading public buckets
   \ (no_auth)
provider> 2

Option namespace.
Object storage namespace
Enter a value.
namespace> idbamagbg734

Option compartment.
Object storage compartment OCID
Enter a value.
compartment> ocid1.compartment.oc1..aaaaaaaapufkxc7ame3sthry5i7ujrwfc7ejnthhu6bhanm5oqfjpyasjkba

Option region.
Object storage Region
Enter a value.
region> us-ashburn-1

Option endpoint.
Endpoint for Object storage API.
Leave blank to use the default endpoint for the region.
Enter a value. Press Enter to leave empty.

Option config_file.
Path to OCI config file
Choose a number from below, or type in your own string value.
Press Enter for the default (~/.oci/config).
 1 / oci configuration file location
   \ (~/.oci/config)
config_file> /etc/oci/dev.conf

Option config_profile.
Profile name inside OCI config file
Choose a number from below, or type in your own string value.
Press Enter for the default (Default).
 1 / Use the default profile
   \ (Default)
config_profile> Test

Edit advanced config?
y) Yes
n) No (default)
y/n> n

Configuration complete.
- type: oracleobjectstorage
- namespace: idbamagbg734
- compartment: ocid1.compartment.oc1..aaaaaaaapufkxc7ame3sthry5i7ujrwfc7ejnthhu6bhanm5oqfjpyasjkba
- region: us-ashburn-1
- provider: user_principal_auth
- config_file: /etc/oci/dev.conf
- config_profile: Test
Keep this "remote" remote?
y) Yes this is OK (default)
e) Edit this remote
d) Delete this remote
y/e/d> y

See all buckets

rclone lsd remote:

Create a new bucket

rclone mkdir remote:bucket

List the contents of a bucket

rclone ls remote:bucket
rclone ls remote:bucket --max-depth 1

Modified time

The modified time is stored as metadata on the object as opc-meta-mtime as floating point since the epoch, accurate to 1 ns.

If the modification time needs to be updated rclone will attempt to perform a server side copy to update the modification if the object can be copied in a single part. In the case the object is larger than 5Gb, the object will be uploaded rather than copied.

Note that reading this from the object takes an additional HEAD request as the metadata isn't returned in object listings.

Multipart uploads

rclone supports multipart uploads with OOS which means that it can upload files bigger than 5 GiB.

Note that files uploaded both with multipart upload and through crypt remotes do not have MD5 sums.

rclone switches from single part uploads to multipart uploads at the point specified by --oos-upload-cutoff. This can be a maximum of 5 GiB and a minimum of 0 (ie always upload multipart files).

The chunk sizes used in the multipart upload are specified by --oos-chunk-size and the number of chunks uploaded concurrently is specified by --oos-upload-concurrency.

Multipart uploads will use --transfers * --oos-upload-concurrency * --oos-chunk-size extra memory. Single part uploads to not use extra memory.

Single part transfers can be faster than multipart transfers or slower depending on your latency from oos - the more latency, the more likely single part transfers will be faster.

Increasing --oos-upload-concurrency will increase throughput (8 would be a sensible value) and increasing --oos-chunk-size also increases throughput (16M would be sensible). Increasing either of these will use more memory. The default values are high enough to gain most of the possible performance without using too much memory.

Standard options

Here are the Standard options specific to oracleobjectstorage (Oracle Cloud Infrastructure Object Storage).


Choose your Auth Provider


  • Config: provider
  • Type: string
  • Default: "env_auth"
  • Examples:
    • "env_auth"
      • automatically pickup the credentials from runtime(env), first one to provide auth wins
    • "user_principal_auth"
    • "instance_principal_auth"
    • "resource_principal_auth"
      • use resource principals to make API calls
    • "no_auth"
      • no credentials needed, this is typically for reading public buckets


Object storage namespace


  • Config: namespace
  • Type: string
  • Required: true


Object storage compartment OCID


  • Config: compartment
  • Provider: !no_auth
  • Type: string
  • Required: true


Object storage Region


  • Config: region
  • Type: string
  • Required: true


Endpoint for Object storage API.

Leave blank to use the default endpoint for the region.


  • Config: endpoint
  • Type: string
  • Required: false


Path to OCI config file


  • Config: config_file
  • Provider: user_principal_auth
  • Type: string
  • Default: "~/.oci/config"
  • Examples:
    • "~/.oci/config"
      • oci configuration file location


Profile name inside the oci config file


  • Config: config_profile
  • Provider: user_principal_auth
  • Type: string
  • Default: "Default"
  • Examples:
    • "Default"
      • Use the default profile

Advanced options

Here are the Advanced options specific to oracleobjectstorage (Oracle Cloud Infrastructure Object Storage).


Cutoff for switching to chunked upload.

Any files larger than this will be uploaded in chunks of chunk_size. The minimum is 0 and the maximum is 5 GiB.


  • Config: upload_cutoff
  • Type: SizeSuffix
  • Default: 200Mi


Chunk size to use for uploading.

When uploading files larger than upload_cutoff or files with unknown size (e.g. from "rclone rcat" or uploaded with "rclone mount" or google photos or google docs) they will be uploaded as multipart uploads using this chunk size.

Note that "upload_concurrency" chunks of this size are buffered in memory per transfer.

If you are transferring large files over high-speed links and you have enough memory, then increasing this will speed up the transfers.

Rclone will automatically increase the chunk size when uploading a large file of known size to stay below the 10,000 chunks limit.

Files of unknown size are uploaded with the configured chunk_size. Since the default chunk size is 5 MiB and there can be at most 10,000 chunks, this means that by default the maximum size of a file you can stream upload is 48 GiB. If you wish to stream upload larger files then you will need to increase chunk_size.

Increasing the chunk size decreases the accuracy of the progress statistics displayed with "-P" flag.


  • Config: chunk_size
  • Type: SizeSuffix
  • Default: 5Mi


Concurrency for multipart uploads.

This is the number of chunks of the same file that are uploaded concurrently.

If you are uploading small numbers of large files over high-speed links and these uploads do not fully utilize your bandwidth, then increasing this may help to speed up the transfers.


  • Config: upload_concurrency
  • Type: int
  • Default: 10


Cutoff for switching to multipart copy.

Any files larger than this that need to be server-side copied will be copied in chunks of this size.

The minimum is 0 and the maximum is 5 GiB.


  • Config: copy_cutoff
  • Type: SizeSuffix
  • Default: 4.656Gi


Timeout for copy.

Copy is an asynchronous operation, specify timeout to wait for copy to succeed


  • Config: copy_timeout
  • Type: Duration
  • Default: 1m0s


Don't store MD5 checksum with object metadata.

Normally rclone will calculate the MD5 checksum of the input before uploading it so it can add it to metadata on the object. This is great for data integrity checking but can cause long delays for large files to start uploading.


  • Config: disable_checksum
  • Type: bool
  • Default: false


The encoding for the backend.

See the encoding section in the overview for more info.


  • Config: encoding
  • Type: MultiEncoder
  • Default: Slash,InvalidUtf8,Dot


If true avoid calling abort upload on a failure, leaving all successfully uploaded parts on S3 for manual recovery.

It should be set to true for resuming uploads across different sessions.

WARNING: Storing parts of an incomplete multipart upload counts towards space usage on object storage and will add additional costs if not cleaned up.


  • Config: leave_parts_on_error
  • Type: bool
  • Default: false


If set, don't attempt to check the bucket exists or create it.

This can be useful when trying to minimise the number of transactions rclone does if you know the bucket exists already.

It can also be needed if the user you are using does not have bucket creation permissions.


  • Config: no_check_bucket
  • Type: bool
  • Default: false

Backend commands

Here are the commands specific to the oracleobjectstorage backend.

Run them with

rclone backend COMMAND remote:

The help below will explain what arguments each command takes.

See the backend command for more info on how to pass options and arguments.

These can be run on a running backend using the rc command backend/command.


change the name of an object

rclone backend rename remote: [options] [<arguments>+]

This command can be used to rename a object.

Usage Examples:

rclone backend rename oos:bucket relative-object-path-under-bucket object-new-name


List the unfinished multipart uploads

rclone backend list-multipart-uploads remote: [options] [<arguments>+]

This command lists the unfinished multipart uploads in JSON format.

rclone backend list-multipart-uploads oos:bucket/path/to/object

It returns a dictionary of buckets with values as lists of unfinished multipart uploads.

You can call it with no bucket in which case it lists all bucket, with a bucket or with a bucket and path.

  "test-bucket": [
                    "namespace": "test-namespace",
                    "bucket": "test-bucket",
                    "object": "600m.bin",
                    "uploadId": "51dd8114-52a4-b2f2-c42f-5291f05eb3c8",
                    "timeCreated": "2022-07-29T06:21:16.595Z",
                    "storageTier": "Standard"


Remove unfinished multipart uploads.

rclone backend cleanup remote: [options] [<arguments>+]

This command removes unfinished multipart uploads of age greater than max-age which defaults to 24 hours.

Note that you can use -i/--dry-run with this command to see what it would do.

rclone backend cleanup oos:bucket/path/to/object
rclone backend cleanup -o max-age=7w oos:bucket/path/to/object

Durations are parsed as per the rest of rclone, 2h, 7d, 7w etc.


  • "max-age": Max age of upload to delete