---
metadata:
  - name: generator
    content: Diplodoc Platform v5.50.6
alternate:
  - https://ydb.tech/docs/en/reference/configuration/blob_storage_config.md
  - https://ydb.tech/docs/ru/reference/configuration/blob_storage_config.md
sourcePath: en/core/reference/configuration/blob_storage_config.md
---
> **Documentation Index:** Fetch the complete configuration index at https://ydb.tech/docs/en/llms.txt

# blob_storage_config

The `blob_storage_config` section specifies a static cluster group's configuration. A static group is necessary for the operation of the basic cluster tablets, including `Hive`, `SchemeShard`, and `BlobstorageController`. As a rule, these tablets do not store a lot of data, so we don't recommend creating more than one static group.

For a static group, specify the disks and nodes that the static group will be placed on. For example, a configuration for the `erasure: none` model can be as follows:

```bash
blob_storage_config:
  service_set:
    groups:
    - erasure_species: none
      rings:
      - fail_domains:
        - vdisk_locations:
          - node_id: 1
            path: /dev/disk/by-partlabel/ydb_disk_ssd_02
            pdisk_category: SSD
....
```

For a configuration located in 3 availability zones, specify 3 rings. For a configuration within a single availability zone, specify exactly one ring.