// diskFillFraction is the fraction of a disk we allow to be filled.
	diskFillFraction = 0.99

	// diskReserveFraction is the fraction of a disk where we will fill other server pools first.
	// If all pools reach this, we will use all pools with regular placement.
	diskReserveFraction = 0.15

	// diskAssumeUnknownSize is the size to assume when an unknown size upload is requested.
	diskAssumeUnknownSize = 1 << 30

Por exemplo, se o cliente tentar enviar um cabeçalho `tool` com o valor `plumbus`, ele irá receber uma resposta de **erro** informando que o parâmetro do cabeçalho `tool` não é permitido:

```json
{
    "detail": [
        {
            "type": "extra_forbidden",
            "loc": ["header", "tool"],
            "msg": "Extra inputs are not permitted",
            "input": "plumbus",

        password("env.ORG_GRADLE_PROJECT_gradleS3SecretKey", "%gradleS3SecretKey%")
        password("env.ORG_GRADLE_PROJECT_artifactoryUserPassword", "%gradle.internal.repository.build-tool.publish.password%")
        password("env.DOTCOM_DEV_DOCS_AWS_ACCESS_KEY", "%dotcomDevDocsAwsAccessKey%")
        password("env.DOTCOM_DEV_DOCS_AWS_SECRET_KEY", "%dotcomDevDocsAwsSecretKey%")

        "/items/", headers=[("save-data", "true"), ("tool", "plumbus")]
    )
    assert response.status_code == 422, response.text
    assert response.json() == snapshot(
        {
            "detail": [
                IsDict(
                    {
                        "type": "extra_forbidden",
                        "loc": ["header", "tool"],
                        "msg": "Extra inputs are not permitted",

- MinIO also supports expansion of existing clusters in server pools. Each pool is a self contained entity with same SLA's (read/write quorum) for each object as original cluster. By using the existing namespace for lookup validation MinIO ensures conflicting objects are not created. When no such object exists then MinIO simply uses the least used pool to place new objects.

### There are no limits on how many server pools can be combined

```

org.apache.maven.di.tool.DiIndexProcessor...

package main

import (
	"flag"
	"fmt"
	"log"
	"os"
	"strings"

	"cmd/internal/buildid"
	"cmd/internal/telemetry/counter"
)

func usage() {
	fmt.Fprintf(os.Stderr, "usage: go tool buildid [-w] file\n")
	flag.PrintDefaults()
	os.Exit(2)
}

var wflag = flag.Bool("w", false, "write build ID")

func main() {
	log.SetPrefix("buildid: ")
	log.SetFlags(0)
	counter.Open()

	consolePort="$((s3Port + 1000))"

	cat <<EOF >/tmp/minio.configfile.$i
version: v1
address: ':${s3Port}'
console-address: ':${consolePort}'
rootUser: 'minr0otUS2r'
rootPassword: 'pBU94AGAY85e'
pools: # Specify the nodes and drives with pools
  -
     - 'http://localhost:9001/tmp/xl/node9001/mnt/disk{1...4}/'
     - 'http://localhost:9002/tmp/xl/node9002/mnt/disk{1,2,3,4}/'
  -
     - 'http://localhost:9003/tmp/xl/node9003/mnt/disk{1...4}/'

const (
	poolIDL = "pool_id"
	setIDL  = "set_id"
)

var (
	erasureSetOverallWriteQuorumMD = NewGaugeMD(erasureSetOverallWriteQuorum,
		"Overall write quorum across pools and sets")
	erasureSetOverallHealthMD = NewGaugeMD(erasureSetOverallHealth,
		"Overall health across pools and sets (1=healthy, 0=unhealthy)")
	erasureSetReadQuorumMD = NewGaugeMD(erasureSetReadQuorum,
		"Read quorum for the erasure set in a pool", poolIDL, setIDL)

	os.Setenv("GO_ADDR2LINETEST_IS_ADDR2LINE", "1") // Set for subprocesses to inherit.
	os.Exit(m.Run())
}

func loadSyms(t *testing.T, dbgExePath string) map[string]string {
	cmd := testenv.Command(t, testenv.GoToolPath(t), "tool", "nm", dbgExePath)
	out, err := cmd.CombinedOutput()
	if err != nil {
		t.Fatalf("%v: %v\n%s", cmd, err, string(out))
	}
	syms := make(map[string]string)
	scanner := bufio.NewScanner(bytes.NewReader(out))