Ceph 各版本特性对比与演进分析 本文档详细分析了Ceph从Nautilus (v14)到最新Squid (v19)版本的主要特性演进，为选择合适版本和

Ceph Monitor Architecture Analysis Monitor Overall Architecture Overview Core Functional Positioning Ceph Monitor serves as the control plane of the cluster, primarily responsible for the following core duties: Cluster Map Maintenance: Managing key mapping information including MonitorMap, OSDMap, CRUSHMap, MDSMap, PGMap, etc. Status Monitoring & Health Checks: Real-time monitoring of cluster status and generating health reports Distributed Consistency Guarantee: Ensuring cluster metadata consistency across all nodes based on Paxos algorithm Authentication & Authorization: Managing CephX authentication system and user permissions Election & Arbitration: Maintaining Monitor quorum and handling failure recovery Monitor Architecture Diagram 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 graph TB subgraph "Ceph Monitor Core Architecture" A[Monitor Daemon] --> B[MonitorStore] A --> C[Paxos Engine] A --> D[Election Module] A --> E[Health Module] A --> F[Config Module] A --> G[Auth Module] B --> B1[ClusterMap Storage] B --> B2[Configuration DB] B --> B3[Transaction Log] C --> C1[Proposal Processing] C --> C2[Leader Election] C --> C3[Consensus Coordination] D --> D1[Connectivity Strategy] D --> D2[Quorum Management] D --> D3[Split-brain Prevention] E --> E1[Health Checks] E --> E2[Status Reporting] E --> E3[Alert Generation] F --> F1[Config Key-Value Store] F --> F2[Runtime Configuration] F --> F3[Config Distribution] G --> G1[CephX Authentication] G --> G2[User Management] G --> G3[Capability Control] end subgraph "External Interactions" H[OSD Daemons] --> A I[MDS Daemons] --> A J[Client Applications] --> A K[Admin Tools] --> A L[Dashboard/Grafana] --> A end Monitor Core Submodule Analysis MonitorStore Storage Engine Functional Overview: MonitorStore is the persistent storage engine of Monitor, implemented based on RocksDB, responsible for storing all critical cluster metadata.

Ceph Monitor 架构解析 Monitor总体架构概览 核心功能定位 Ceph Monitor作为集群的控制平面，主要承担以下核心职责： 集群映射维护：管理Monitor

Vision and Objectives Core Goal: Optimize I/O performance for Erasure Coded pools to be similar to Replicated Pools Primary Objectives: Lower Total Cost of Ownership (TCO) Make Erasure Coded pools viable for use with block and file storage Enabling “Optimised” EC Important Considerations Default State: All optimizations are turned off by default Per-Pool Configuration: Optimizations can be enabled for each pool individually ⚠️ Irreversible Operation: OPTIMIZATIONS CANNOT BE SWITCHED OFF once enabled Version Requirements: All OSDs, MONs, and MGRs must be upgraded to Tentacle or later Backward Compatibility: Compatible with old clients Configuration Methods Enable optimizations for a specific pool 1 ceph osd pool set <pool_name> allow_ec_optimizations true Enable optimizations by default for new pools 1 2 [mon] osd_pool_default_flag_ec_optimizations = true Key Technical Features Previously Implemented Core Features Partial Reads Partial Writes Note: Partial metadata – unwritten shards have no processing Parity Delta Writes Per-IO auto-switch between write methods Larger Default Chunk Size Direct Read Direct Write New Important Features 1.

分布式文件系统 (DFS) 完整指南 来源: WEKA - Distributed File Systems Guide 日期: April 27, 2021 目录 DFS命名空间 分布式文件系统架构 分布式文件系统特性 现代分布式文件系统的特征 分布式文