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QoS RSE Configuration

QoS RSE Configuration​

The following steps show how to configure an RSE to use the Rucio storage-managed QoS feature (with two classes, disk-buffer and tape). Rucio now supports a site's ability to set how long data lives on a tape or disk-buffer at the RSE level. Data is pinned with a value (in seconds) at the time of injection/creation/buffering allowing data site operators to better tune data persistence and movement.

How to Configure an RSE for QoS​

  1. Set the following RSE attributes:

    staging_required: True
    maximum_pin_lifetime: 345600 (in seconds)
    staging_buffer: {{value}} # this value can be the name of the RSE.

Upon executing rucio-admin rse info <RSE> command one should see something like the following in settings:

```bash
                                .
                                .
Attributes:
===========
  maximum_pin_lifetime: 345600
  staging_buffer: <RSE>
  staging_required: True
                                .
                                .
```
  1. Either values of DISK or TAPE are supported for the RSE setting rse_type. However workflows using PanDA job brokerage require this value to be DISK.

Upon executing rucio-admin rse info <RSE> command one should see something like the following in settings:

```bash
                                .
                                .
Settings:
=========
  rse: <RSE>
  rse_type: DISK
                                .
                                .
```