influxdb 反对将时序数据导出到文件，而后再将文件导入到数据库中，以此实现数据的迁徙。
导出
导出命令的语法格局：
# influx_inspect export --help
Exports TSM files into InfluxDB line protocol format.
Usage: influx_inspect export [flags]
-compress
Compress the output
-database string
Optional: the database to export
-datadir string
Data storage path (default "/root/.influxdb/data")
-end string
Optional: the end time to export (RFC3339 format)
-out string
Destination file to export to (default "/root/.influxdb/export")
-retention string
Optional: the retention policy to export (requires -database)
-start string
Optional: the start time to export (RFC3339 format)
-waldir string
WAL storage path (default "/root/.influxdb/wal")数据导出 demo：
influx_inspect export -datadir "/var/lib/influxdb/data" -waldir "/var/lib/influxdb/wal" -out "influxdb_dump_out" -database "opsultra" -start "2021-09-10T00:00:00Z"
其中：datadir: influxdb 的数据寄存地位
waldir: influxdb 的 wal 目录
out: 输入文件
database: 导出的 db 名称
start: 从什么工夫导出 导入
导入的命令语法：
# influx -import --help
Usage of influx:
-version
Display the version and exit.
-host 'host name'
Host to connect to.
-port 'port #'
Port to connect to.
-socket 'unix domain socket'
Unix socket to connect to.
-database 'database name'
Database to connect to the server.
-password 'password'
Password to connect to the server. Leaving blank will prompt for password (--password '').
-username 'username'
Username to connect to the server.
-ssl
Use https for requests.
-unsafeSsl
Set this when connecting to the cluster using https and not use SSL verification.
-execute 'command'
Execute command and quit.
-format 'json|csv|column'
Format specifies the format of the server responses: json, csv, or column.
-precision 'rfc3339|h|m|s|ms|u|ns'
Precision specifies the format of the timestamp: rfc3339, h, m, s, ms, u or ns.
-consistency 'any|one|quorum|all'
Set write consistency level: any, one, quorum, or all
-pretty
Turns on pretty print for the json format.
-import
Import a previous database export from file
-pps
How many points per second the import will allow. By default it is zero and will not throttle importing.
-path
Path to file to import
-compressed
Set to true if the import file is compressed
Examples:
# Use influx in a non-interactive mode to query the database "metrics" and pretty print json:
$ influx -database 'metrics' -execute 'select * from cpu' -format 'json' -pretty
# Connect to a specific database on startup and set database context:
$ influx -database 'metrics' -host 'localhost' -port '8086'将下面导出的文件导入：
# influx -import -path=/root/influxdb_dump_out -precision=ns
其中：import: 标识导入
path: 导入文件
precision: 导入的数据工夫精度