}...) {
				return 0, err
			}
		}

		eof := err == io.EOF || err == io.ErrUnexpectedEOF
		if n == 0 && total != 0 {
			// Reached EOF, nothing more to be done.
			break
		}

		// We take care of the situation where if n == 0 and total == 0 by creating empty data and parity files.
		blocks, err = e.EncodeData(ctx, buf[:n])
		if err != nil {
			return 0, err
		}

No, an upgrade should not cause any downtime. However, on the first startup -
since MinIO will attempt to migrate any existing IAM data - the boot process may
take slightly longer, but may not be visibly noticeable. Once the migration has

```
sudo pip install yq
alias kv-pairify='yq ".configuration[]" | jq ".[]" | jq -r ".name + \"=\" + .value"'
```

For active-active replication, automatic failover occurs on `GET/HEAD` operations if object or object version requested qualifies for replication and is missing on one site, but present on the other. This allows the applications to take full advantage of two-way replication even before the two sites get fully synced.

Also note that `mc` version `RELEASE.2021-09-02T09-21-27Z` or older supports only a single remote target per bucket. To take advantage of multiple destination replication, use the latest version of `mc`

```sh
firewall-cmd --zone=public --add-port=9000/tcp --permanent
```

Note that `permanent` makes sure the rules are persistent across firewall start, restart or reload. Finally reload the firewall for changes to take effect.

```sh
firewall-cmd --reload
```

### iptables

				skipReplicate = obj.IsDeleteMarker && s3Type
			}
			if skipReplicate {
				continue
			}

			wk.Take()
			go func() {
				defer wk.Give()
				stopFn := globalBatchJobsMetrics.trace(batchJobMetricReplication, job.ID, attempts)
				success := true
				if err := r.ReplicateFromSource(ctx, api, core, oi, retry); err != nil {

// listPathRaw will list a path on the provided drives.
// See listPathRawOptions on how results are delivered.
// Directories are always returned.
// Cache will be bypassed.
// Context cancellation will be respected but may take a while to effectuate.
func listPathRaw(ctx context.Context, opts listPathRawOptions) (err error) {
	disks := opts.disks
	if len(disks) == 0 {
		return fmt.Errorf("listPathRaw: 0 drives provided")
	}

// collected in errs slice and returned by Wait().
func (g *NotificationGroup) Go(ctx context.Context, f func() error, index int, addr xnet.Host) {
	r := rand.New(rand.NewSource(time.Now().UnixNano()))

	g.workers.Take()

	go func() {
		defer g.workers.Give()

		g.errs[index] = NotificationPeerErr{
			Host: addr,
		}
		for i := 0; i < g.retryCount; i++ {
			g.errs[index].Err = nil
			if err := f(); err != nil {

			hr := healResp{respBytes, apiErr, errMsg}
			respCh <- hr
		}()
	}

	// Due to the force-starting functionality, the Launch
	// call above can take a long time - to keep the
	// connection alive, we start sending whitespace
	keepConnLive(w, r, respCh)
}

// getAggregatedBackgroundHealState returns the heal state of disks.