# Copy UFS Data

## Copy UFS Data

Distributed copy allows users to efficiently copy data from one UFS to another UFS. This can be used for data relocation and synchronization between two UFS.

### Usage

There are two recommended ways to trigger distributed load:

#### job copy CLI

The CLI sends a copy request to the Alluxio coordinator, which subsequently distributes the copy operation to all worker nodes.

```shell
bin/alluxio job copy [flags]
```

* Operate a copy task:

```shell
$ {ALLUXIO_HOME}/bin/alluxio job copy --src s3://bucket/src --dst s3://bucket/dst --[submit|progress|stop]

$ {ALLUXIO_HOME}/bin/alluxio job copy --local-index-file /indexfile --[submit|progress|stop]

$ {ALLUXIO_HOME}/bin/alluxio job copy --ufs-index-file s3://bucket/indexfile --[submit|progress|stop]
```

## Example output

```
Progress for jobId 1c849041-ef26-4ed7-a932-2af5549754d7 copying path '/src' to '/dst':
        Settings: "check-content: false"
        Job Submitted: 2023-06-30 12:30:45.0
        Job Id: 111111
        Job State: RUNNING
        Files qualified so far: 1, 826.38MB
        Files Failed: 0
        Files Skipped: 0
        Files Succeeded: 1
        Bytes Copied: 826.38MB
        Throughput: 1621.09KB/s
        Files failure rate: 0.00%
```

For detailed usage of CLI, please refer to the [job copy](/ee-ai-en/ai-3.5/reference/user-cli.md) documentation。

#### REST API

Similar to the CLI, the REST API can also be used to copy data. Requests are sent directly to the coordinator.

```shell
curl -H "Content-Type: application/json"  -v -X POST http://coordinator_host:19999/api/v1/master/submit_job/copy -d '{
  "src": "s3://alluxiow/testm/dir-1/dir1",
  "dst": "s3://alluxiow/testm/dir-1/dir2",
  "options": {
    "batchSize": "300",
    "check_content": "true"
  }
}'
```

Progress can be checked by sending a GET request with the same path.

```shell
curl -H "Content-Type: application/json"  -v -X GET http://coordinator_host:19999/api/v1/master/progress_job/copy -d '{
  "src": "s3://alluxiow/testm/dir-1/dir1",
  "dst": "s3://alluxiow/testm/dir-1/dir2",
  "format": "TEXT[default] | JSON",
  "verbose": "true"
}'
```

The copy operation can be terminated by sending a POST request.

```shell
curl -H "Content-Type: application/json"  -v -X POST http://coordinator_host:19999/api/v1/master/stop_job/copy -d '{
  "src": "s3://alluxiow/testm/dir-1/dir1",
  "dst": "s3://alluxiow/testm/dir-1/dir2"
}'
```

The copy jobs can be list by sending a POST request. The results only include copy tasks within seven days. The residence time of historical tasks can be configured through `alluxio.job.retention.time`.

```shell
curl http://coordinator_host:19999/api/v1/master/list_job?[job-type=COPY[&job-state=[RUNNING|VERIFYING|STOPPED|SUCCEEDED|FAILED|ALL]]
```


---

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