82 lines
1.4 KiB
Markdown
82 lines
1.4 KiB
Markdown
# 备份与恢复
|
|
|
|
## 在线快照
|
|
|
|
BaraDB 支持在线快照，无需停止服务器。快照使用 MVCC 捕获一致的时间点视图。
|
|
|
|
### 创建快照
|
|
|
|
```nim
|
|
import barabadb/core/backup
|
|
|
|
var bm = newBackupManager()
|
|
bm.createSnapshot("/backup/baradb_2025-01-15")
|
|
```
|
|
|
|
### 通过 CLI
|
|
|
|
```bash
|
|
./build/baradadb --snapshot --output=/backup/snapshot.db
|
|
```
|
|
|
|
### 通过 HTTP API
|
|
|
|
```bash
|
|
curl -X POST http://localhost:9470/api/backup \
|
|
-d '{"destination": "/backup/snapshot.db"}'
|
|
```
|
|
|
|
### 自动备份
|
|
|
|
```bash
|
|
0 2 * * * /usr/local/bin/baradadb --snapshot --output=/backup/baradb_$(date +\%Y\%m\%d).db
|
|
find /backup -name "baradb_*.db" -mtime +7 -delete
|
|
```
|
|
|
|
## 时间点恢复 (PITR)
|
|
|
|
### 从快照 + WAL 恢复
|
|
|
|
```bash
|
|
./build/baradadb --recover \
|
|
--checkpoint=/backup/snapshot.db \
|
|
--wal-dir=/backup/wal
|
|
```
|
|
|
|
### 通过 SQL 恢复
|
|
|
|
```sql
|
|
RECOVER TO TIMESTAMP '2026-05-07T12:00:00';
|
|
```
|
|
|
|
## 灾难恢复场景
|
|
|
|
### 场景 1：文件损坏
|
|
|
|
```bash
|
|
cp /backup/sstables/000012.sst ./data/sstables/
|
|
./build/baradadb --rebuild-index
|
|
```
|
|
|
|
### 场景 2：完全数据丢失
|
|
|
|
```bash
|
|
cp /backup/snapshot.db ./data/
|
|
./build/baradadb --recover --wal-dir=/backup/wal
|
|
```
|
|
|
|
### 场景 3：集群节点故障
|
|
|
|
```bash
|
|
BARADB_RAFT_NODE_ID=newnode \
|
|
BARADB_RAFT_PEERS=node1:9001,node2:9001 \
|
|
./build/baradadb
|
|
```
|
|
|
|
## 最佳实践
|
|
|
|
1. 定期测试恢复
|
|
2. 将备份存储在场外
|
|
3. 加密备份
|
|
4. 监控备份作业
|
|
5. 记录 RTO/RPO |