### 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
minio server --address :9002 /disk{1...4}/data/tenant2
minio server --address :9003 /disk{1...4}/data/tenant3
```

![Example-2](https://github.com/minio/minio/blob/master/docs/screenshots/Example-2.jpg?raw=true)

## 2. Distributed Deployment

// (st_size, as made by say ftruncate(2)), would require a metadata flush.
//
// The aim of fdatasync() is to reduce disk activity for applications that
// do not require all metadata to be synchronized with the disk.
func Fdatasync(f *os.File) error {
	return syscall.Fdatasync(int(f.Fd()))
}

// FadviseDontNeed invalidates page-cache
func FadviseDontNeed(f *os.File) error {

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

package disk_test

import (
	"testing"

	"github.com/minio/minio/internal/disk"
)

func TestFree(t *testing.T) {
	di, err := disk.GetInfo(t.TempDir(), true)
	if err != nil {
		t.Fatal(err)
	}

	if di.FSType == "UNKNOWN" {
		t.Error("Unexpected FSType", di.FSType)
	}

	}
	sys.Unlock()
}

// RemoveStaleBuckets removes all stale buckets in memory that are not on disk.
func (sys *BucketMetadataSys) RemoveStaleBuckets(diskBuckets set.StringSet) {
	sys.Lock()
	defer sys.Unlock()

	for bucket := range sys.metadataMap {
		if diskBuckets.Contains(bucket) {
			continue
		} // doesn't exist on disk remove from memory.
		delete(sys.metadataMap, bucket)
		globalBucketMonitor.DeleteBucket(bucket)
	}

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

package ioutil

import (
	"io"
	"io/fs"
	"os"

	"github.com/minio/minio/internal/disk"
)

var (
	// OpenFileDirectIO allows overriding default function.
	OpenFileDirectIO = disk.OpenFileDirectIO
	// OsOpen allows overriding default function.
	OsOpen = os.Open
	// OsOpenFile allows overriding default function.
	OsOpenFile = os.OpenFile
)

// errErasureWriteQuorum - did not meet write quorum.
var errErasureWriteQuorum = errors.New("Write failed. Insufficient number of drives online")

// errNoHealRequired - returned when healing is attempted on a previously healed disks.

echo -n "Starting MinIO instances ..."
minio server --certs-dir /tmp/certs --address ":9001" --console-address ":10000" /tmp/minio1/{1...4}/disk{1...4} /tmp/minio1/{5...8}/disk{1...4} >/tmp/minio1_1.log 2>&1 &
minio server --certs-dir /tmp/certs --address ":9002" --console-address ":11000" /tmp/minio2/{1...4}/disk{1...4} /tmp/minio2/{5...8}/disk{1...4} >/tmp/minio2_1.log 2>&1 &
echo "done"

if [ ! -f ./mc ]; then
	echo -n "Downloading MinIO client ..."

        SmbShareInfo pipeShare = new SmbShareInfo("PIPE", 3, "A named pipe");
        assertEquals(SmbFile.TYPE_NAMED_PIPE, pipeShare.getType());

        // Test for TYPE_SHARE (disk share)
        SmbShareInfo diskShare = new SmbShareInfo("DISK", 0, "A disk share");
        assertEquals(SmbFile.TYPE_SHARE, diskShare.getType());

        // Test for another type that should default to TYPE_SHARE

	defer updateOSMetrics(osMetricOpen, name)(err)
	return os.Open(name)
}

// OpenFileDirectIO captures time taken to call disk.OpenFileDirectIO
func OpenFileDirectIO(name string, flag int, perm os.FileMode) (f *os.File, err error) {
	defer updateOSMetrics(osMetricOpenFileDirectIO, name)(err)
	return disk.OpenFileDirectIO(name, flag, perm)
}

// Lstat captures time taken to call os.Lstat

        // parent references child with artifactId (which is not directory name)
        // then relative path calculation will fail during build from disk but success when calculated from repo
        try {
            // build from disk expected to fail
            testInheritance("tricky-flat-artifactId-urls", false);
            // fail( "should have failed since module reference == artifactId != directory name" );