## Sample `POST` Request

```

## Enabling Parquet Format

Parquet is DISABLED by default since hostile crafted input can easily crash the server.

If you are in a controlled environment where it is safe to assume no hostile content can be uploaded to your cluster you can safely enable Parquet.
To enable Parquet set the environment variable `MINIO_API_SELECT_PARQUET=on`.

## Example using Python API

### 1. Prerequisites

Subnet Health

Subnet Health diagnostics help ensure that the underlying infrastructure that runs MinIO is configured correctly, and is functioning properly. This test is one-shot long running one, that is recommended to be run as soon as the cluster is first provisioned, and each time a failure scenario is encountered. Note that the test incurs majority of the available resources on the system. Care must be taken when using this to debug failure scenario, so as to prevent larger outages. Health...

 stanConnection, _ = stan.Connect("test-cluster", "test-client", stan.NatsURL("nats://yourusername:yoursecret@0.0.0.0:4222"), stan.SetConnectionLostHandler(func(c stan.Conn, _ error) {
  go func() {
   for {
    // Reconnect if the connection is lost.
    if stanConnection == nil || stanConnection.NatsConn() == nil ||  !stanConnection.NatsConn().IsConnected() {

	b.caches = make(map[string]metacache, 10)
	b.cachesRoot = make(map[string][]string, 10)
}

// deleteCache will delete a specific cache and all files related to it across the cluster.
func (b *bucketMetacache) deleteCache(id string) {
	b.mu.Lock()
	c, ok := b.caches[id]
	if ok {
		// Delete from root map.
		list := b.cachesRoot[c.root]
		for i, lid := range list {
			if id == lid {

	LastFailedCount uint64 `json:"failedCount_last5min"`
	// Count of unreplicated entries that were dropped after MRF retry limit reached since cluster start.
	TotalDroppedCount uint64 `json:"droppedCount_since_uptime"`
	// Bytes of unreplicated entries that were dropped after MRF retry limit reached since cluster start.
	TotalDroppedBytes uint64 `json:"droppedBytes_since_uptime"`
}

// SMA struct for calculating simple moving average

	ObjectsTotalSize uint64                           `json:"objectsTotalSize"`
	ReplicationInfo  map[string]BucketTargetUsageInfo `json:"objectsReplicationInfo"`

	// Total number of buckets in this cluster
	BucketsCount uint64 `json:"bucketsCount"`

	// Buckets usage info provides following information across all buckets
	// - total size of the bucket
	// - total objects in a bucket
	// - object size histogram per bucket

**NOTE**: When configuring multiple OpenID based authentication providers on a MinIO cluster, any number of Role Policy based providers may be configured, and at most one JWT Claim based provider may be configured.

<details><summary>Example 1: Two role policy providers</summary>

Sample environment variables:

    public void addUpdateConfigListener(final String name, final Supplier<String> listener) {
        updateConfigListenerMap.put(name, listener);
    }

    /**
     * Checks if the cluster state has changed.
     *
     * @param status The current cluster status.
     * @return true if the state has changed, false otherwise.
     */
    public boolean isChangedClusterState(final int status) {

shred -s 500M /tmp/data/custpartsize
echo "done"

# Add replication site
./mc admin replicate add minio1 minio2 --insecure
# sleep for replication to complete
sleep 30

# Create bucket in source cluster
echo "Create bucket in source MinIO instance"
./mc mb minio1/test-bucket --insecure

# Load objects to source site
echo "Loading objects to source MinIO instance"
set -x