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docs: Fix admin/settings/leo_storage
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yosukehara committed Mar 22, 2017
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## Prior Knowledge

!!! note ""
You cannot modify the following LeoStorage's configurations after launched a LeoFS system because the algorithm of retrieving objects depends on their configurations, that means LeoStorage cannot access objects.
!!! note "Note: Configuration"
LeoStroage's features depend on its configuration. If once a LeoFS system is launched, you cannot modify the following LeoStorage's configurations because the algorithm of the data operation strictly adheres to the configurations.

#### NOT able to change items:

- LeoStorage Basic
- `obj_containers.path`
- `obj_containers.num_of_containers`
- `obj_containers.metadata_storage`
- `num_of_vnodes`
#### Irrevocable and Attention Required Items:

| Item | Irrevocable? | Description |
|----------------------------------------|----------------|------------------------------------------|
| **LeoStorage Basic** |
| obj_containers.path | Modifiable with condition | Able to change the directory of the container(s) but not able to add or remove the directory(s). You need to move the data files which are `<obj\_containers.path>/avs/object` and `<obj\_containers.path>/avs/metadata`, which adhere to this configuration. |
| obj_containers.num\_of\_containers | Yes | Not able to change the configuration because LeoStorage cannot retrieve objects or metadatas. |
| obj_containers.metadata\_storage | Yes | As above |
| num_of_vnodes` | Yes | As above |
| **MQ** |
| mq.backend\_db | Modifiable with condition | Lose all the MQ's data after changing |
| mq.num\_of\_mq\_procs | Modifiable with condition | As above |
| **Replication and Recovery object(s)** |
| replication.rack_awareness.rack_id | Yes | Not able to change the configuration because LeoFS cannot retrieve objects or metadatas. |
| **Other Directories Settings** |
| queue_dir | Modifiable with condition | Able to change the MQ's directory but you need to move the MQ's data, which adhere to this configuration. |


## Configuration
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