# Erasure code sizing guide

## Toy Setups

Capacity constrained environments, MinIO will work but not recommended for production.

| servers | drives (per node) | stripe_size | parity chosen (default) | tolerance for reads (servers) | tolerance for writes (servers) |
|--------:|------------------:|------------:|------------------------:|------------------------------:|-------------------------------:|

    border-radius: 4px;
    padding: 75px 45px 35px;
    position: relative;
    -webkit-box-sizing: border-box;
            box-sizing: border-box;
    /* Custom line-height */
    line-height: 1.2;
}

[data-termynal]:before {
    content: '';
    position: absolute;
    top: 15px;
    left: 15px;

*/

.screenshot {
  display: block;
  background-color: #d3e0de;
  border-radius: 4px;
  padding: 45px 5px 5px;
  position: relative;
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
}

.screenshot img {
  display: block;
  border-radius: 2px;
}

.screenshot:before {
  content: '';
  position: absolute;
  top: 15px;
  left: 15px;

Refer to the sizing guide with details on the default parity count chosen for different erasure stripe sizes [here](https://github.com/minio/minio/blob/master/docs/distributed/SIZING.md)

MinIO places new objects in server pools based on proportionate free space, per pool. Following pseudo code demonstrates this behavior.

     */
    protected int length = 0;
    /**
     * The call ID for matching requests and responses
     */
    protected int call_id = 0;
    /**
     * The allocation hint for buffer sizing
     */
    protected int alloc_hint = 0;
    /**
     * The result code of the DCERPC operation
     */
    protected int result = 0;

    /**
     * Checks if a specific flag is set

## List of Amazon S3 APIs not supported on MinIO

Refer to sizing guide for more understanding on default values chosen depending on your erasure stripe size [here](https://github.com/minio/minio/blob/master/docs/distributed/SIZING.md). Parity settings can be changed using [storage classes](https://github.com/minio/minio/tree/master/docs/erasure/storage-class).

     */
    protected int length = 0;
    /**
     * The call ID for matching requests and responses
     */
    protected int call_id = 0;
    /**
     * The allocation hint for buffer sizing
     */
    protected int alloc_hint = 0;
    /**
     * The result code of the DCERPC operation
     */
    protected int result = 0;

    /**
     * Gets the packet type of this DCERPC message

   */
  public static String join(String separator, byte... array) {
    checkNotNull(separator);
    if (array.length == 0) {
      return "";
    }

    // For pre-sizing a builder, just get the right order of magnitude
    StringBuilder builder = new StringBuilder(array.length * 5);
    builder.append(array[0]);
    for (int i = 1; i < array.length; i++) {
      builder.append(separator).append(array[i]);
    }

|------------------|-----------------------|
| 5 or fewer       |                 EC:2  |
| 6-7              |                 EC:3  |
| 8 or more        |                 EC:4  |

For more complete documentation on Erasure Set sizing, see the [MinIO Documentation on Erasure Sets](https://docs.min.io/community/minio-object-store/operations/concepts/erasure-coding.html#erasure-sets).

### Allowed values for REDUCED_REDUNDANCY storage class