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Ozone/HDDS
https://ozone.apache.org/docs/1.2.1/index.html

分布式存储

兼容S3对象存储API
兼容HDFS
使用RAFT协议

概念：
Ozone consists of volumes, buckets, and keys.
namespace:

  • Volumes are similar to user accounts. used to store buckets. Only administrators can create or delete volumes.
  • Buckets are similar to directories. A bucket can contain any number of keys, but buckets - cannot contain other buckets.
  • Keys are similar to files.

namespace is managed by a daemon called Ozone Manager (OM)
block space is managed by Storage Container Manager (SCM).