Rebuild a Volume: Rawx


Find information about the service you want to rebuild. By running openio cluster list rawx you will get a list of all rawx service IDs accompanied by their volume paths.

Verify that the service was automatically scored to zero by running openio cluster list rawx.

If not, lock the score of the targeted rawx service to zero by running openio cluster lock rawx <RAWX_ID>, where RAWX_ID is the network address of the service (ip:port). This will prevent the service from receiving upload requests, and will reduce the number of download requests.

Set the incident date

Set an incident on the target rawx service by running the openio volume admin command:

# openio volume admin incident <RAWX_ID>

| Volume         |       Date |
| | 1537262799 |

By default, the incident date is the current timestamp. You can change this incident date by using the parameter --date <TIMESTAMP>.

Check that the incident date is correctly set:

# openio volume admin show <RAWX_ID>

| Field         | Value          |
| volume        | |
| incident_date | 1537262799     |

Launch rebuilding

You can now launch the rebuild by using the oio-blob-rebuilder tool:

# oio-blob-rebuilder <NAMESPACE> --volume <RAWX_ID>

25661 7FCEB9EC7EB0 log INFO START volume= last_report=2018-09-27T12:17:46 0.00s chunks=0 0.00/s bytes=0 0.00B/s errors=0 0.00% start_time=2018-09-27T12:17:46 0.00s total_chunks=0 0.00/s total_bytes=0 0.00B/s total_errors=0 0.00% progress=0/1490 0.00%
25661 7FCEB90F22D0 log INFO RUN volume= last_report=2018-09-27T12:17:46 10.09s chunks=275 27.25/s bytes=184766464 18307632.15B/s errors=0 0.00% start_time=2018-09-27T12:17:46 10.09s total_chunks=275 27.25/s total_bytes=184766464 18307628.26B/s total_errors=0 0.00% progress=275/1490 18.46%
25661 7FCEB90F20F0 log INFO RUN volume= last_report=2018-09-27T12:18:27 10.29s chunks=271 26.34/s bytes=189318144 18402483.44B/s errors=0 0.00% start_time=2018-09-27T12:17:46 51.25s total_chunks=1374 26.81/s total_bytes=956872704 18671525.55B/s total_errors=0 0.00% progress=1374/1490 92.21%
25661 7FCEB9EC7EB0 log INFO DONE volume= last_report=2018-09-27T12:18:38 4.11s chunks=116 28.20/s bytes=79408128 19306981.87B/s errors=0 0.00% start_time=2018-09-27T12:17:46 55.36s total_chunks=1490 26.91/s total_bytes=1036280832 18718735.70B/s total_errors=0 0.00% progress=1490/1490 100.00%

Clear the incident date

After the rebuilding and if there were no errors, you can clear the incident.

# openio volume admin clear --before-incident <RAWX_ID>

| Volume         | Success | Message                                    |
| | True    | {'removed': 0, 'repaired': 0, 'errors': 0} |

# openio volume admin show <RAWX_ID>

| Field  | Value          |
| volume | |

Distribute rebuilding

To distribute, we use the Master/Slave model. The broken chunks are sent to beanstalkd tubes and the slave rebuilders listen to these beanstalkd tubes.

You can start a slave:

# oio-blob-rebuilder <NAMESPACE> --beanstalkd <SLAVE1_IP:SLAVE1_PORT>

You can start the master:

# oio-blob-rebuilder <NAMESPACE> --volume <RAWX_ID> --distributed <SLAVE1_IP:SLAVE1_PORT;SLAVE2_IP:SLAVE2_PORT;...> --beanstalkd <MASTER_IP:MASTER_PORT> --beanstalkd-tube oio-rebuilt

The slaves must be started before the master.