# MinIO Server Limits Per Tenant

For optimal production setup MinIO recommends Linux kernel version 4.x and later.

## Erasure Code (Multiple Drives / Servers)

| Item                                                            | Specification |
|:----------------------------------------------------------------|:--------------|
| Maximum number of servers per cluster                           | no-limit      |

NOTE:

- `timeToFirstByte` and `timeToResponse` will be expressed in Nanoseconds.
- Additionally in the case of the erasure coded setup `tags.objectLocation` provides per object details about
  - Pool number the object operation was performed on.
  - Set number the object operation was performed on.

## Explore Further

- [The MinIO documentation website](https://docs.min.io/community/minio-object-store/index.html)
- [MinIO Erasure Code Overview](https://docs.min.io/community/minio-object-store/operations/concepts/erasure-coding.html)
- [Use `mc` with MinIO Server](https://docs.min.io/community/minio-object-store/reference/minio-mc.html)

		t.Fatal("Unexpected object layer initialization error", err)
	}

	_, ok := obj.(*erasureServerPools)
	if !ok {
		t.Fatal("Unexpected object layer detected", reflect.TypeOf(obj))
	}

	// Tests for Erasure object layer initialization.

	// Create temporary backend for the test server.
	nDisks = 16
	disks, err = getRandomDisks(nDisks)
	if err != nil {
		t.Fatal("Failed to create drives for the backend")
	}

package cmd

import (
	"net/http"

	"github.com/minio/minio/internal/grid"
	"github.com/minio/mux"
)

// Composed function registering routers for only distributed Erasure setup.
func registerDistErasureRouters(router *mux.Router, endpointServerPools EndpointServerPools) {
	var (
		lockGrid   = globalLockGrid.Load()
		commonGrid = globalGrid.Load()
	)

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"bytes"
	"context"
	"testing"
)

// Wrapper for calling GetObjectInfo tests for both Erasure multiple disks and single node setup.
func TestGetObjectInfo(t *testing.T) {
	ExecObjectLayerTest(t, testGetObjectInfo)
}

// Testing GetObjectInfo().

- All versions, including delete-markers should be deleted before deleting a bucket.
- **Versioning feature is only available in erasure coded and distributed erasure coded setups**.

## How to configure versioning on a bucket

Each bucket created has a versioning configuration associated with it. By default bucket is unversioned as shown below

```

To verify the above sample alert follow below steps

1. Start a distributed MinIO instance (4 nodes setup)
2. Start Prometheus server and AlertManager
3. Bring down couple of MinIO instances to bring down the Erasure Set tolerance to -1 and verify the same with `mc admin prometheus metrics ALIAS | grep minio_cluster_health_erasure_set_status`

`bucket1.domain.com` will point to IP address set in `MINIO_PUBLIC_IPS`.

- This field is mandatory for standalone and erasure code MinIO server deployments, to enable federated mode.
- This field is optional for distributed deployments. If you don't set this field in a federated setup, we use the IP addresses of

### Additional notes

Tiering and lifecycle transition are applicable only to erasure/distributed MinIO.

## Explore Further

- [MinIO | Golang Client API Reference](https://docs.min.io/community/minio-object-store/developers/go/API.html#SetBucketLifecycle)