influxdb如何配置数据持久化

InfluxDB的数据持久化方式可以在配置文件中进行设置。以下是配置文件中设置数据持久化的示例：

1. 内存缓存：

[storage]
engine = "inmem"

2. 磁盘存储：

[storage]
engine = "tsm1"
dir = "/var/lib/influxdb/data"

3. 备份和恢复：

[meta]
dir = "/var/lib/influxdb/meta"
[data]
dir = "/var/lib/influxdb/data"
wal-dir = "/var/lib/influxdb/wal"

[[snapshot]]
name = "backup1"
out = "/var/backups/influxdb/backup1"

4. 高可用性集群：

[meta]
dir = "/var/lib/influxdb/meta"

[data]
dir = "/var/lib/influxdb/data"
wal-dir = "/var/lib/influxdb/wal"
query-log-enabled = false

[retention]
enabled = true
check-interval = "30m"

[shard-precreation]
enabled = true
anticipation-window = "1h"

[cluster]
write-timeout = "10s"
shard-writer-timeout = "5s"
shard-mapper-timeout = "5s"
snapshot-interval = "10s"
snapshot-outgoing-timeout = "30s"
snapshot-incoming-timeout = "30s"
max-snapshot-build-time = "1h"
max-snapshot-size = 0
max-wal-size = 0
max-series-per-database = 1000000
max-values-per-tag = 100000
max-concurrent-queries = 0

以上示例中的配置项可以根据实际情况进行修改。其中，`dir`属性表示数据文件的存储目录，`wal-dir`属性表示WAL文件的存储目录，`out`属性表示备份文件的输出目录，`snapshot`表示备份文件的名称，`cluster`表示集群相关的配置信息。