MinIO 默认情况下，具有标准存储类的对象的奇偶校验设置为 N/2，具有减少冗余存储类对象的对象的奇偶校验设置为 2。
KEY: storage_class define object level redundancy 定义对象级冗余 ARGS: standard (string) set the parity count for default standard storage class e.g. "EC:4" 设置默认标准存储类的奇偶校验计数 rrs (string) set the parity count for reduced redundancy storage class e.g. "EC:2" 为减少的冗余存储类设置奇偶校验计数 comment (sentence) optionally add a comment to this setting
通过修改 .minio.sys/config/config.json 文件来实现，如下：
{
//...
"storage_class": {
"_": [{
"key": "rrs",
"value": "EC:2"
},{
"key": "standard",
"value": "EC:4"
}]
},
//...
}当然，也可以通过环境变量进行控制。如下：
KEY: storage_class define object level redundancy 定义对象级冗余 ARGS: MINIO_STORAGE_CLASS_STANDARD (string) set the parity count for default standard storage class e.g. "EC:4" MINIO_STORAGE_CLASS_RRS (string) set the parity count for reduced redundancy storage class e.g. "EC:2" MINIO_STORAGE_CLASS_COMMENT (sentence) optionally add a comment to this setting
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