# mc replicate backlog
LLMS index: [llms.txt](/llms.txt)
---
> [!NOTE]
> **Changed: mc.RELEASE.2023-07-18T21-05-38Z**
>
> `mc replicate diff` has been renamed `mc replicate backlog`. No functionality has changed.
## Description {#description}
The [`mc replicate backlog`](#command-mc.replicate.backlog) shows a list of unreplicated new or deleted objects.
You can list the replication status of objects for a particular remote target. To do so, you must have the ARN of the remote target. You can use [retrieve the remote targets configured for a bucket](/reference/deprecated/mc-admin-bucket-remote/#minio-retrieve-remote-bucket-targets) to find the ARN.
## Syntax {#syntax}
**EXAMPLE**
The following command shows new or deleted objects in the `notes` bucket of the `teamorange/projects` prefix on the `myminio` alias that have not yet replicated to a specific remote target bucket. The remote target’s ARN is `arn:minio:replication::3bb8c736-4014-42c5-b3cb-d64e3ebaa75e:notes`.
```shell
mc replicate backlog myminio/notes/teamorange/projects --arn arn:minio:replication::3bb8c736-4014-42c5-b3cb-d64e3ebaa75e:notes
```
If any new or deleted objects have not yet replicated, the command outputs something similar to the following:
```shell
[0001-01-01 00:00:00 UTC] [2022-10-06 17:18:59 UTC] 478efe49-aa9d-46ab-8268-45b70cc4c341 PUT agenda.docx
[0001-01-01 00:00:00 UTC] [2022-10-06 17:18:15 UTC] b283bf43-319f-455a-a779-3c2e669fad88 PUT budget-meeting.docx
```
In the output, `PUT` corresponds to a new object. Deleted objects or versions would show `DEL`.
**SYNTAX**
The command has the following syntax:
```shell
mc [GLOBALFLAGS] replicate backlog \
[--arn "string"] \
TARGET
```
- Brackets `[]` indicate optional parameters.
- Parameters sharing a line are mutually dependent.
- Parameters separated using the pipe `|` operator are mutually exclusive.
Copy the example to a text editor and modify as-needed before running the command in the terminal/shell.
### Parameters {#parameters}
##### `TARGET` {#mc.replicate.backlog.TARGET}
*mc-cmd*
*Required*
The path to the alias, prefix, or object.
##### `arn` {#mc.replicate.backlog.arn}
*mc-cmd*
*Optional*
The ARN of the remote bucket to check for new or deleted objects that have not yet replicated.
When specified, the command returns a list of any new or deleted objects that have not replicated to the remote target. If not specified, the command returns a list of new or deleted objects on the source deployment that have not replicated to any remote target.
### Global Flags {#global-flags}
This command supports any of the [global flags](/reference/minio-mc/#minio-mc-global-options).
## Examples {#examples}
### View Unreplicated Versions of Objects at a Prefix {#view-unreplicated-versions-of-objects-at-a-prefix}
Display unreplicated `PUT` and `DELETE` actions for a prefix:
```shell
mc replicate backlog myminio/mybucket/path/to/prefix
```
- Replace `myminio/mybucket` with the [`ALIAS`](/reference/minio-mc/mc-replicate-add/#mc.replicate.add.ALIAS) and full bucket path for which to create the replication configuration.
- Replace `path/to/prefix` with the prefix or object to use for the request.
If unreplicated objects exist, the output returns a list of the actions that created or removed objects at the prefix that have not replicated to a remote target:
```shell
[0001-01-01 00:00:00 UTC] [2022-10-06 17:18:59 UTC] 478efe49-aa9d-46ab-8268-45b70cc4c341 PUT agenda.docx
[0001-01-01 00:00:00 UTC] [2022-10-06 17:18:15 UTC] b283bf43-319f-455a-a779-3c2e669fad88 PUT budget-meeting.docx
```
### View Unreplicated Objects at a Specific Remote Target {#view-unreplicated-objects-at-a-specific-remote-target}
The following [`mc replicate backlog`](#command-mc.replicate.backlog) command shows unreplicated objects at an alias/bucket/prefix path for a specific remote target:
```shell
mc replicate backlog myminio/mybucket/path/to/prefix --arn
```
- Replace `myminio/mybucket` with the [`ALIAS`](/reference/minio-mc/mc-replicate-add/#mc.replicate.add.ALIAS) and full bucket path for which to show unreplicated objects.
- Replace the `path/to/prefix` with the desired prefix or object path.
- Replace `` with the resource number for a specific remote target.
If unreplicated objects exist, the output returns a list of the actions that created or removed objects that have not replicated to the remote target:
```shell
[0001-01-01 00:00:00 UTC] [2022-10-06 17:18:59 UTC] 478efe49-aa9d-46ab-8268-45b70cc4c341 PUT agenda.docx
[0001-01-01 00:00:00 UTC] [2022-10-06 17:18:15 UTC] b283bf43-319f-455a-a779-3c2e669fad88 PUT budget-meeting.docx
```
### S3 Compatibility {#s3-compatibility}
SILO is the supported server for PGSTY mcli; compatibility with upstream MinIO and other S3 services is [best effort](/reference/minio-mc/#command-mc).