1.CouchBase是什么
2.CouchBase的特点
- Cluster支持完善度不够或者直接没有Cluster
- 没有良好的高可用性机制，持久化支持的亦不是很完善
- 扩容和故障恢复能操作维护复杂
- 其他
而CouchBase则对上面的一些缺点都有着良好的支持。或者说
CouchBase所提供的任何单一功能，在市面上基本上都能找到一款数据库能够满足。但是这些数据库实际使用的话总是会有各种各样的妥协，性能很好的话，扩展性可能很差之类的。而CouchBase的目标就是建立一个大一统，各种功能都包含可用，所谓接近完美的数据库。
3.CouchBase版本
Data access | Community Edition | Enterprise Edition |
| Key-value interface (read/write) |  |  |
| N1QL (SQL-based queries) |  |  |
| N1QL for Analytics (SQL++ queries) |  |  |
| Full-Text Search (FTS) |  |  |
| Global Secondary Indexes (GSI) |  |  |
| MapReduce views |  |  |
| Tunable query consistency |  |  |
| Tunable durability |  |  |
| Development and administration tools | Community Edition | Enterprise Edition |
| Web-based UI |  |  |
| Graphical explain plan |  |  |
| Built-in query editor |  |  |
| Built-in schema browser |  |  |
| Query monitoring |  |  |
| REST API |  |  |
| Command line tools |  |  |
| Import and export tools |  |  |
| ANSI Joins support in N1QL |  |  |
| Couchbase Eventing |  |  |
| High availability and disaster recovery | Community Edition | Enterprise Edition |
| Intra-cluster replication |  |  |
| Automatic failover |  |  |
| Online rebalancing |  |  |
| Index replicas and swap rebalance |  |  |
| Cross Datacenter Replication (XDCR) |  |  |
| XDCR filtering and throttling |  |  |
| XDCR timestamp-based conflict resolution |  |  |
| Rack/availability zone awareness |  |  |
| Standard backup and restore tools |  |  |
| High performance enterprise backup and restore tools |  | |
| Full, incremental, and cumulative backups |  |  |
| Automatic failover of disk failures, multi-nodes and server group |  |  |
| Security | Community Edition | Enterprise Edition |
| Authentication |  |  |
| Authorization |  |  |
| Role-Based Access Control (RBAC) |  |  |
| LDAP integration |  |  |
| Encrypted network access |  |  |
| x.509 CA certificates for TLS |  |  |
| x.509 CA certificates for data service authentication |  |  |
| Auditing |  |  |
| N1QL request auditing |  |  |
| Log redactions |  |  |
| Client-side field-level encryption |  |  |
| IPv6 support |  |  |
| Performance and scaling | Community Edition | Enterprise Edition |
| Unlimited query concurrency |  |  |
| Memory-optimized indexes |  |  |
| Homogenous scaling (by node) |  |  |
| Multi-Dimensional Scaling (MDS) |  |  |
| Plasma – high performance storage engine for indexes |  |  |
| Fast failover |  |  |
| Ephemeral buckets |  | |
| Ephemeral buckets with Query, Search, XDCR |  |  |
| Index pushdown |  | |
| Index partitioning |  |  |
| N1QL aggregate pushdown |  |  |
| End-to-end compression (client to server and XDCR) |  |  |
| Adaptive indexes |  |  |
| Container management and orchestration | Community Edition | Enterprise Edition |
| Autonomous Operator for Kubernetes |  |  |
| Openshift integration |  |  |
