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Fix STANDARD defaults, point to new docs site. (#11800)

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Ravind Kumar 2021-03-16 15:04:28 -04:00 committed by GitHub
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docs/erasure/storage-class/README.md
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MinIO server supports storage class in erasure coding mode. This allows configurable data and parity disks per object.
This page is intended as a summary of MinIO Erasure Coding. For a more complete explanation, see https://docs.min.io/minio/baremetal/concepts/erasure-coding.html.
## Overview
MinIO supports two storage classes, Reduced Redundancy class and Standard class. These classes can be defined using environment variables
@ -43,7 +45,16 @@ You can calculate _approximate_ storage usage ratio using the formula - total dr
Parity blocks can not be higher than data blocks, so `STANDARD` storage class parity can not be higher than N/2. (N being total number of disks)
Default value for `STANDARD` storage class is `N/2` (N is the total number of drives).
The default value for the `STANDARD` storage class depends on the number of volumes in the erasure set:
| Erasure Set Size | Default Parity (EC:N) |
|------------------|-----------------------|
| 5 or fewer | EC:2 |
| 6-7 | EC:3 |
| 8 or more | EC:4 |
Prior to the ``RELEASE.2021-01-30T00-20-58Z`` MinIO release, the default `STANDARD` value was `EC(N/2)` where `N` was the number of erasure set drives.
For more complete documentation on Erasure Set sizing, see the [MinIO Documentation on Erasure Sets](https://docs.min.io/minio/baremetal/concepts/erasure-coding.html#erasure-sets).
### Allowed values for REDUCED_REDUNDANCY storage class