![quota](https://raw.githubusercontent.com/minio/minio/master/docs/bucket/quota/bucketquota.png)

Buckets can be configured to have `Hard` quota - it disallows writes to the bucket after configured quota limit is reached.

## Prerequisites

### 1. Fetch the root identity

As the initial step, fetch the private key and certificate of the root identity:

```sh
curl -sSL --tlsv1.2 \
     -O 'https://raw.githubusercontent.com/minio/kes/master/root.key' \
     -O 'https://raw.githubusercontent.com/minio/kes/master/root.cert'
```

### 2. Set the MinIO-KES configuration

```sh
export MINIO_KMS_KES_ENDPOINT=https://play.min.io:7373

getdeps: ## fetch necessary dependencies
	@mkdir -p ${GOPATH}/bin
	@echo "Installing golangci-lint" && curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(GOLANGCI_DIR)
	@echo "Installing msgp" && go install -v github.com/tinylib/msgp@v1.1.10-0.20240227114326-6d6f813fff1b

Refer to the dashboard [json file here](https://raw.githubusercontent.com/minio/minio/master/docs/metrics/prometheus/grafana/minio-dashboard.json).

![Grafana](https://raw.githubusercontent.com/minio/minio/master/docs/metrics/prometheus/grafana/grafana-minio.png)

```sh
minio server --address :9001 /data/tenant1
minio server --address :9002 /data/tenant2
minio server --address :9003 /data/tenant3
```

![Example-1](https://github.com/minio/minio/blob/master/docs/screenshots/Example-1.jpg?raw=true)

### 1.2 Host Multiple Tenants on Multiple Drives (Erasure Code)

Use the following commands to host 3 tenants on multiple drives:

```sh
minio server --address :9001 /disk{1...4}/data/tenant1

live in containers and are managed by orchestration platforms. MinIO brings robust, scalable, AWS S3 compatible object storage to the lot.

![Cloud-native](https://github.com/minio/minio/blob/master/docs/screenshots/Minio_Cloud_Native_Arch.jpg?raw=true)...

![Erasure](https://github.com/minio/minio/blob/master/docs/screenshots/erasure-code.jpg?raw=true)

## What is Bit Rot protection?

| `minio_cluster_health_nodes_online_count`          | `gauge` | Count of online nodes in the cluster           |        |
| `minio_cluster_health_capacity_raw_total_bytes`    | `gauge` | Total cluster raw storage capacity in bytes    |        |
| `minio_cluster_health_capacity_raw_free_bytes`     | `gauge` | Total cluster raw storage free in bytes        |        |

Each header contains a mspg array (tuple) encoded object:

xlHeaderVersion version == 1:

```
//msgp:tuple xlMetaV2VersionHeader
type xlMetaV2VersionHeader struct {
 VersionID [16]byte  // Version UUID, raw.
 ModTime   int64     // Unix nanoseconds.
 Signature [4]byte   // Signature of metadata.
 Type      uint8     // Type if the version
 Flags     uint8
}
```

The following flags are defined:

```

|:---------------------------------------------|:---------------------------------------------------------------|
| `minio_cluster_capacity_raw_free_bytes`      | Total free capacity online in the cluster.                     |
| `minio_cluster_capacity_raw_total_bytes`     | Total capacity online in the cluster.                          |