name: CubeFS Vocabulary
description: >-
  Controlled terms used across the CubeFS distributed file system covering
  cluster, volume, partition, node, and access protocols.
terms:
  - term: Cluster
    definition: A CubeFS deployment composed of a master, data nodes, meta nodes, and ObjectNodes.
  - term: Master
    definition: Control-plane process responsible for metadata coordination and cluster management.
  - term: DataNode
    definition: Storage process that hosts data partitions and serves read/write to clients.
  - term: MetaNode
    definition: Storage process that hosts meta partitions and serves filesystem metadata operations.
  - term: ObjectNode
    definition: Gateway process that exposes the S3-compatible API for object storage clients.
  - term: Volume
    definition: A logical filesystem unit on the cluster with quota, replication, and partition layout.
  - term: DataPartition
    definition: A unit of data placement on data nodes; replication factor applies per partition.
  - term: MetaPartition
    definition: A unit of metadata placement on meta nodes; carries inode and dentry data.
  - term: ErasureCoding
    definition: Storage mode trading replication for parity-coded data placement to reduce overhead.
  - term: Tenant
    definition: An isolated user/owner namespace with policies and quota.
  - term: AccessKey
    definition: S3-style identifier used to sign requests against the ObjectNode.
  - term: SecretKey
    definition: S3-style secret paired with an access key to compute request signatures.
  - term: PosixClient
    definition: FUSE-based client mounting a CubeFS volume as a POSIX filesystem.
  - term: HdfsClient
    definition: HDFS-protocol client accessing CubeFS for analytics workloads.