集群产品线Cluster Product Line
HGDB HA CLUSTER V4.2

瀚高高可用集群软件 V4.2 Highgo High-Availability Cluster Software V4.2

基于 WAL 日志流复制技术，实现主库故障自动检测与秒级切换，支持一主多备架构，RPO = 0，保障核心业务 7×24 不间断运行。 WAL log streaming replication with automatic primary failure detection and second-level switchover. One-primary multi-standby, RPO = 0, for uninterrupted 7×24 core business operations.

<30s
RTO
≈ 0
RPO
7×24
连续运行Uptime
1+N
主备架构Architecture
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核心功能Core Functions

企业级高可用
集群架构Enterprise-Grade
HA Cluster Architecture

WAL 流复制 · RPO = 0WAL Streaming · Zero RPO
基于 PostgreSQL WAL 日志同步复制，同步模式下主库提交即备库确认，数据零丢失（RPO=0）。
PostgreSQL WAL log synchronous replication — primary commits only after standby confirms. Zero data loss (RPO = 0) in synchronous mode.
VIP 漂移 · 业务透明切换VIP Failover · Transparent Switchover
虚拟 IP 自动漂移至新主库，应用无需修改连接串，业务感知时间 <30 秒。
Virtual IP automatically migrates to new primary. No application connection changes — business downtime under 30 seconds.
脑裂防护 · 自动仲裁Split-Brain Protection & Arbitration
内置脑裂检测与自动降级机制，防止双主写入数据冲突，集群仲裁机制保证数据一致性。
Built-in split-brain detection and automatic demotion prevents dual-primary write conflicts. Quorum arbitration ensures data consistency.
同步/异步复制自动切换Auto Sync/Async Mode Switching
网络抖动时自动降级为异步复制，保证主库写入不被阻塞；网络恢复后自动升级回同步模式。
Automatically degrades to async replication during network instability to prevent primary blocking; auto-upgrades back to sync when network recovers.
一键安装 · REST APIOne-Click Install & REST API
图形化一键部署，支持在线集群扩展与节点伸缩，REST API 开放集群管理接口，便于自动化运维集成。
Graphical one-click deployment with online cluster expansion. REST API exposes cluster management for automation and DevOps integration.
HGHAC v4.2 — Cluster Status
$ hghac cluster status   + Cluster: hgdb-ha-cluster (7823419832) +--+-----------+----+---------+---------+ | | Member | IP | Role | State | +--+-----------+----+---------+---------+ |*| node-1 | .1 | Leader | running | | | node-2 | .2 | Replica | running | | | node-3 | .3 | Replica | running | +--+-----------+----+---------+---------+   Replication lag: 0 ms (sync) VIP: 10.0.0.100 → node-1 ✓ RPO: 0 bytes | RTO: 28s
// SUPPORTED DBs
✓ HGDB V9.0
✓ HGDB Security V4.5
✓ PostgreSQL 9.3+
// NETWORKING
✓ IPv4 / IPv6
✓ SSL/TLS
✓ SM3 / MD5

让核心业务永不停机Keep Mission-Critical Systems Always On

瀚高高可用集群，秒级切换，数据零丢失，一键部署，立即体验。 Second-level switchover, zero data loss, one-click deployment — try it now.

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