## What is Erasure Code?

## Architecture

Expansion of ellipses and choice of erasure sets based on this expansion is an automated process in MinIO. Here are some of the details of our underlying erasure coding behavior.

- Erasure coding used by MinIO is [Reed-Solomon](https://github.com/klauspost/reedsolomon) erasure coding scheme, which has a total shard maximum of 256 i.e 128 data and 128 parity. MinIO design goes beyond this limitation by doing some practical architecture choices.

//
// You can use returned dial function for `http.Transport.DialContext`.
//
// In this function, it uses functions from `rand` package. To make it really random,
// you MUST call `rand.Seed` and change the value from the default in your application
func DialContextWithLookupHost(lookupHost LookupHost, baseDialCtx DialContext) DialContext {
	if lookupHost == nil {
		lookupHost = net.DefaultResolver.LookupHost
	}

# Path Operation Advanced Configuration

## OpenAPI operationId

!!! warning
    If you are not an "expert" in OpenAPI, you probably don't need this.

You can set the OpenAPI `operationId` to be used in your *path operation* with the parameter `operation_id`.

You would have to make sure that it is unique for each operation.

```Python hl_lines="6"
{!../../../docs_src/path_operation_advanced_configuration/tutorial001.py!}
```

	shardSize := int(e.ShardSize())
	if cap(b) < len(readers)*shardSize {
		// We should always have enough capacity, but older objects may be bigger.
		globalBytePoolCap.Load().Put(b)
		b = nil
	} else {
		// Seed the buffers.
		for i := range bufs {
			bufs[i] = b[i*shardSize : (i+1)*shardSize]
		}
	}

	return &parallelReader{
		readers:       readers,
		orgReaders:    readers,
		dataBlocks:    e.dataBlocks,

		} else { // part of header can be accommodated
			r.opts.HeaderSize -= b - 1
			need = 1 // to ensure we read at least one byte for every Read
			tokens = b
		}
	} else { // all tokens go towards payload
		need = int(math.Min(float64(b), float64(need)))
		tokens = need
	}

	err = r.throttle.WaitN(r.ctx, tokens)
	if err != nil {
		return
	}

	n, err = r.r.Read(buf[:need])
	if err != nil {

  }

  private final boolean hasSeed;
  private final long seed;

  public SpecialRandom() {
    this.hasSeed = false;
    this.seed = 0;
  }

  public SpecialRandom(long seed) {
    super(seed);
    this.hasSeed = true;
    this.seed = seed;
  }

  @Override
  public String toString() {
    return hasSeed ? "(seed:" + seed : "(default seed)";
  }

  private static final long serialVersionUID = 0;

  }

  private final boolean hasSeed;
  private final long seed;

  public SpecialRandom() {
    this.hasSeed = false;
    this.seed = 0;
  }

  public SpecialRandom(long seed) {
    super(seed);
    this.hasSeed = true;
    this.seed = seed;
  }

  @Override
  public String toString() {
    return hasSeed ? "(seed:" + seed : "(default seed)";
  }

  private static final long serialVersionUID = 0;

func (r *lockedRandSource) Int63() (n int64) {
	r.lk.Lock()
	n = r.src.Int63()
	r.lk.Unlock()
	return
}

// Seed uses the provided seed value to initialize the generator to a
// deterministic state.
func (r *lockedRandSource) Seed(seed int64) {
	r.lk.Lock()
	r.src.Seed(seed)
	r.lk.Unlock()

  chmod +x "/usr/local/bin/bazel"
fi

# "TFCI_MACOS_UPGRADE_PYENV_ENABLE" is used to decide if we need to upgrade the
# Pyenv version. We enable this for macOS x86 builds as the default Pyenv on
# those VMs does not support installing Python 3.12 and above which we need
# for running smoke tests in nightly/release wheel builds.
if [[ "${TFCI_MACOS_UPGRADE_PYENV_ENABLE}" == 1 ]]; then