### Welcome to the InfluxDB configuration file.

 # The values in this file override the default values used by the system if

 # a config option is not specified. The commented out lines are the configuration

 # field and the default value used. Uncommenting a line and changing the value

 # will change the value used at runtime when the process is restarted.

 # Once every 24 hours InfluxDB will report usage data to usage.influxdata.com

 # The data includes a random ID, os, arch, version, the number of series and other

 # usage data. No data from user databases is ever transmitted.

 # Change this option to true to disable reporting.

 # 该选项用于上报influxdb的使用信息给InfluxData公司，默认值为false

 # reporting-disabled = false

 # Bind address to use for the RPC service for backup and restore.

 # 备份恢复时使用，默认值为8088

 # bind-address = "127.0.0.1:8088"

 ###

 ### [meta]

 ###

 ### Controls the parameters for the Raft consensus group that stores metadata

 ### about the InfluxDB cluster.

 ###

 [meta]

   # Where the metadata/raft database is stored

   # meta数据存放目录，默认值：/var/lib/influxdb/meta

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

   # Automatically create a default retention policy when creating a database.

   # 用于控制默认存储策略，数据库创建时，会自动生成autogen的存储策略，默认值：true

   # retention-autocreate = true

   # If log messages are printed for the meta service

   # 是否开启日志，默认值：true

   # logging-enabled = true

 ###

 ### [data]

 ###

 ### Controls where the actual shard data for InfluxDB lives and how it is

 ### flushed from the WAL. "dir" may need to be changed to a suitable place

 ### for your system, but the WAL settings are an advanced configuration. The

 ### defaults should work for most systems.

 ###

 [data]

   # The directory where the TSM storage engine stores TSM files.

   # 最终数据（TSM文件）存储目录，默认值：/var/lib/influxdb/data

   dir = "/var/lib/influxdb/data"

   # The directory where the TSM storage engine stores WAL files.

   # 预写日志存储目录，默认值：/var/lib/influxdb/wal

   wal-dir = "/var/lib/influxdb/wal"

   # The amount of time that a write will wait before fsyncing.  A duration

   # greater than 0 can be used to batch up multiple fsync calls.  This is useful for slower

   # disks or when WAL write contention is seen.  A value of 0s fsyncs every write to the WAL.

   # Values in the range of 0-100ms are recommended for non-SSD disks.

   # wal-fsync-delay = "0s"

   # The type of shard index to use for new shards.  The default is an in-memory index that is

   # recreated at startup.  A value of "tsi1" will use a disk based index that supports higher

   # cardinality datasets.

   # index-version = "inmem"

   # Trace logging provides more verbose output around the tsm engine. Turning

   # this on can provide more useful output for debugging tsm engine issues.

   # 是否开启trace日志，默认值： false

   # trace-logging-enabled = false

   # Whether queries should be logged before execution. Very useful for troubleshooting, but will

   # log any sensitive data contained within a query.

   # query-log-enabled = true

   # Validates incoming writes to ensure keys only have valid unicode characters.

   # This setting will incur a small overhead because every key must be checked.

   # validate-keys = false

   # Settings for the TSM engine

   # CacheMaxMemorySize is the maximum size a shard's cache can

   # reach before it starts rejecting writes.

   # Valid size suffixes are k, m, or g (case insensitive, 1024 = 1k).

   # Values without a size suffix are in bytes.

   # 用于限定shard最大值，大于该值时会拒绝写入，默认值：

   # DefaultCacheMaxMemorySize = 1024 * 1024 * 1024 // 1GB

   # cache-max-memory-size = "1g"

   # CacheSnapshotMemorySize is the size at which the engine will

   # snapshot the cache and write it to a TSM file, freeing up memory

   # Valid size suffixes are k, m, or g (case insensitive, 1024 = 1k).

   # Values without a size suffix are in bytes.

   # 用于设置快照大小，大于该值时数据会刷新到tsm文件，默认值：

   # DefaultCacheSnapshotMemorySize = 25 * 1024 * 1024 // 25MB

   # cache-snapshot-memory-size = "25m"

   # CacheSnapshotWriteColdDuration is the length of time at

   # which the engine will snapshot the cache and write it to

   # a new TSM file if the shard hasn't received writes or deletes

   # tsm1引擎 snapshot写盘延迟，默认值：10m

   # cache-snapshot-write-cold-duration = "10m"

   # CompactFullWriteColdDuration is the duration at which the engine

   # will compact all TSM files in a shard if it hasn't received a

   # write or delete

   #tsm文件在压缩前可以存储的最大时间，默认值：4h

   # compact-full-write-cold-duration = "4h"

   # The maximum number of concurrent full and level compactions that can run at one time.  A

   # value of 0 results in 50% of runtime.GOMAXPROCS(0) used at runtime.  Any number greater

   # than 0 limits compactions to that value.  This setting does not apply

   # to cache snapshotting.

   # max-concurrent-compactions = 0

   # CompactThroughput is the rate limit in bytes per second that we

   # will allow TSM compactions to write to disk. Note that short bursts are allowed

   # to happen at a possibly larger value, set by CompactThroughputBurst

   # compact-throughput = "48m"

   # CompactThroughputBurst is the rate limit in bytes per second that we

   # will allow TSM compactions to write to disk.

   # compact-throughput-burst = "48m"

   # If true, then the mmap advise value MADV_WILLNEED will be provided to the kernel with respect to

   # TSM files. This setting has been found to be problematic on some kernels, and defaults to off.

   # It might help users who have slow disks in some cases.

   # tsm-use-madv-willneed = false

   # Settings for the inmem index

   # The maximum series allowed per database before writes are dropped.  This limit can prevent

   # high cardinality issues at the database level.  This limit can be disabled by setting it to

   # 0.

   # 限制数据库的级数，该值为0时取消限制，默认值：1000000

   # max-series-per-database = 1000000

   # The maximum number of tag values per tag that are allowed before writes are dropped.  This limit

   # can prevent high cardinality tag values from being written to a measurement.  This limit can be

   # disabled by setting it to 0.

   # 一个tag最大的value数，0取消限制，默认值：100000

   # max-values-per-tag = 100000

   # Settings for the tsi1 index

   # The threshold, in bytes, when an index write-ahead log file will compact

   # into an index file. Lower sizes will cause log files to be compacted more

   # quickly and result in lower heap usage at the expense of write throughput.

   # Higher sizes will be compacted less frequently, store more series in-memory,

   # and provide higher write throughput.

   # Valid size suffixes are k, m, or g (case insensitive, 1024 = 1k).

   # Values without a size suffix are in bytes.

   # max-index-log-file-size = "1m"

   # The size of the internal cache used in the TSI index to store previously

   # calculated series results. Cached results will be returned quickly from the cache rather

   # than needing to be recalculated when a subsequent query with a matching tag key/value

   # predicate is executed. Setting this value to 0 will disable the cache, which may

   # lead to query performance issues.

   # This value should only be increased if it is known that the set of regularly used

   # tag key/value predicates across all measurements for a database is larger than 100. An

   # increase in cache size may lead to an increase in heap usage.

   series-id-set-cache-size = 100

 ###

 ### [coordinator]

 ###

 ### Controls the clustering service configuration.

 ###

 [coordinator]

   # The default time a write request will wait until a "timeout" error is returned to the caller.

   # 写操作超时时间，默认值： 10s

   # write-timeout = "10s"

   # The maximum number of concurrent queries allowed to be executing at one time.  If a query is

   # executed and exceeds this limit, an error is returned to the caller.  This limit can be disabled

   # by setting it to 0.

   # 最大并发查询数，0无限制，默认值： 0

   # max-concurrent-queries = 0

   # The maximum time a query will is allowed to execute before being killed by the system.  This limit

   # can help prevent run away queries.  Setting the value to 0 disables the limit.

   # 查询操作超时时间，0无限制，默认值：0s

   # query-timeout = "0s"

   # The time threshold when a query will be logged as a slow query.  This limit can be set to help

   # discover slow or resource intensive queries.  Setting the value to 0 disables the slow query logging.

   # 慢查询超时时间，0无限制，默认值：0s

   # log-queries-after = "0s"

   # The maximum number of points a SELECT can process.  A value of 0 will make

   # the maximum point count unlimited.  This will only be checked every second so queries will not

   # be aborted immediately when hitting the limit.

   # SELECT语句可以处理的最大点数（points），0无限制，默认值：0

   # max-select-point = 0

   # The maximum number of series a SELECT can run.  A value of 0 will make the maximum series

   # count unlimited.

   # SELECT语句可以处理的最大级数（series），0无限制，默认值：0

   # max-select-series = 0

   # The maximum number of group by time bucket a SELECT can create.  A value of zero will max the maximum

   # number of buckets unlimited.

   # SELECT语句可以处理的最大"GROUP BY time()"的时间周期，0无限制，默认值：0

   # max-select-buckets = 0

 ###

 ### [retention]

 ###

 ### Controls the enforcement of retention policies for evicting old data.

 ###

 [retention]

   # Determines whether retention policy enforcement enabled.

   # 是否启用该模块，默认值 ： true

   # enabled = true

   # The interval of time when retention policy enforcement checks run.

   # 检查时间间隔，默认值 ："30m"

   # check-interval = "30m"

 ###

 ### [shard-precreation]

 ###

 ### Controls the precreation of shards, so they are available before data arrives.

 ### Only shards that, after creation, will have both a start- and end-time in the

 ### future, will ever be created. Shards are never precreated that would be wholly

 ### or partially in the past.

 [shard-precreation]

   # Determines whether shard pre-creation service is enabled.

   # enabled = true

   # The interval of time when the check to pre-create new shards runs.

   # check-interval = "10m"

   # The default period ahead of the endtime of a shard group that its successor

   # group is created.

   # advance-period = "30m"

 ###

 ### Controls the system self-monitoring, statistics and diagnostics.

 ###

 ### The internal database for monitoring data is created automatically if

 ### if it does not already exist. The target retention within this database

 ### is called 'monitor' and is also created with a retention period of 7 days

 ### and a replication factor of 1, if it does not exist. In all cases the

 ### this retention policy is configured as the default for the database.

 [monitor]

   # Whether to record statistics internally.

   # 是否启用该模块，默认值 ：true

   # store-enabled = true

   # The destination database for recorded statistics

   # 默认数据库："_internal"

   # store-database = "_internal"

   # The interval at which to record statistics

   # 统计间隔，默认值："10s"

   # store-interval = "10s"

 ###

 ### [http]

 ###

 ### Controls how the HTTP endpoints are configured. These are the primary

 ### mechanism for getting data into and out of InfluxDB.

 ###

 [http]

   # Determines whether HTTP endpoint is enabled.

   # 是否启用该模块，默认值 ：true

    enabled = true

   # Determines whether the Flux query endpoint is enabled.

   # flux-enabled = false

   # Determines whether the Flux query logging is enabled.

   # flux-log-enabled = false

   # The bind address used by the HTTP service.

   # 绑定地址，默认值：":8086"

    bind-address = ":8086"

   # Determines whether user authentication is enabled over HTTP/HTTPS.

   # 是否开启认证，默认值：false

   # auth-enabled = false

   # The default realm sent back when issuing a basic auth challenge.

   # realm = "InfluxDB"

   # Determines whether HTTP request logging is enabled.

   # 是否开启日志，默认值：true

   # log-enabled = true

   # Determines whether the HTTP write request logs should be suppressed when the log is enabled.

   # suppress-write-log = false

   # When HTTP request logging is enabled, this option specifies the path where

   # log entries should be written. If unspecified, the default is to write to stderr, which

   # intermingles HTTP logs with internal InfluxDB logging.

   #

   # If influxd is unable to access the specified path, it will log an error and fall back to writing

   # the request log to stderr.

   # access-log-path = ""

   # Filters which requests should be logged. Each filter is of the pattern NNN, NNX, or NXX where N is

   # a number and X is a wildcard for any number. To filter all 5xx responses, use the string 5xx.

   # If multiple filters are used, then only one has to match. The default is to have no filters which

   # will cause every request to be printed.

   # access-log-status-filters = []

   # Determines whether detailed write logging is enabled.

   # 是否开启写操作日志，如果置成true，每一次写操作都会打日志，默认值：false

   # write-tracing = false

   # Determines whether the pprof endpoint is enabled.  This endpoint is used for

   # troubleshooting and monitoring.

   # 是否开启pprof，默认值：true

   # pprof-enabled = true

   # Enables a pprof endpoint that binds to localhost:6060 immediately on startup.

   # This is only needed to debug startup issues.

   # debug-pprof-enabled = false

   # Determines whether HTTPS is enabled.

   # 是否开启https，默认值：false

   # https-enabled = false

   # The SSL certificate to use when HTTPS is enabled.

   # 设置https证书路径，默认值："/etc/ssl/influxdb.pem"

   # https-certificate = "/etc/ssl/influxdb.pem"

   # Use a separate private key location.

   # 设置https私钥，无默认值

   # https-private-key = ""

   # The JWT auth shared secret to validate requests using JSON web tokens.

   # 用于JWT签名的共享密钥，无默认值

   # shared-secret = ""

   # The default chunk size for result sets that should be chunked.

   # 配置查询返回最大行数，默认值：0

   # max-row-limit = 0

   # The maximum number of HTTP connections that may be open at once.  New connections that

   # would exceed this limit are dropped.  Setting this value to 0 disables the limit.

   # 配置最大连接数，0无限制，默认值：0

   # max-connection-limit = 0

   # Enable http service over unix domain socket

   # unix-socket-enabled = false

   # The path of the unix domain socket.

   # unix-socket路径，默认值："/var/run/influxdb.sock"

   # bind-socket = "/var/run/influxdb.sock"

   # The maximum size of a client request body, in bytes. Setting this value to 0 disables the limit.

   # max-body-size = 25000000

   # The maximum number of writes processed concurrently.

   # Setting this to 0 disables the limit.

   # max-concurrent-write-limit = 0

   # The maximum number of writes queued for processing.

   # Setting this to 0 disables the limit.

   # max-enqueued-write-limit = 0

   # The maximum duration for a write to wait in the queue to be processed.

   # Setting this to 0 or setting max-concurrent-write-limit to 0 disables the limit.

   # enqueued-write-timeout = 0

 ###

 ### [logging]

 ###

 ### Controls how the logger emits logs to the output.

 ###

 [logging]

   # Determines which log encoder to use for logs. Available options

   # are auto, logfmt, and json. auto will use a more a more user-friendly

   # output format if the output terminal is a TTY, but the format is not as

   # easily machine-readable. When the output is a non-TTY, auto will use

   # logfmt.

   # format = "auto"

   # Determines which level of logs will be emitted. The available levels

   # are error, warn, info, and debug. Logs that are equal to or above the

   # specified level will be emitted.

   # level = "info"

   # Suppresses the logo output that is printed when the program is started.

   # The logo is always suppressed if STDOUT is not a TTY.

   # suppress-logo = false

 ###

 ### [subscriber]

 ###

 ### Controls the subscriptions, which can be used to fork a copy of all data

 ### received by the InfluxDB host.

 ###

 [subscriber]

   # Determines whether the subscriber service is enabled.

   # 是否启用该模块，默认值 ：true

   # enabled = true

   # The default timeout for HTTP writes to subscribers.

   # http超时时间，默认值："30s"

   # http-timeout = "30s"

   # Allows insecure HTTPS connections to subscribers.  This is useful when testing with self-

   # signed certificates.

   # 是否允许不安全的证书，当测试自己签发的证书时比较有用。默认值： false

   # insecure-skip-verify = false

   # The path to the PEM encoded CA certs file. If the empty string, the default system certs will be used

   # 设置CA证书，无默认值

   # ca-certs = ""

   # The number of writer goroutines processing the write channel.

   # 设置并发数目，默认值：40

   # write-concurrency = 40

   # The number of in-flight writes buffered in the write channel.

   # 设置buffer大小，默认值：1000

   # write-buffer-size = 1000

 ###

 ### [[graphite]]

 ###

 ### Controls one or many listeners for Graphite data.

 ###

 [[graphite]]

   # Determines whether the graphite endpoint is enabled.

   # 是否启用该模块，默认值 ：false

   # enabled = false

   # 数据库名称，默认值："graphite"

   # database = "graphite"

   # 存储策略，无默认值

   # retention-policy = ""

   # 绑定地址，默认值：":2003"

   # bind-address = ":2003"

   # 协议，默认值："tcp"

   # protocol = "tcp"

   # 一致性级别，默认值："one"

   # consistency-level = "one"

   # These next lines control how batching works. You should have this enabled

   # otherwise you could get dropped metrics or poor performance. Batching

   # will buffer points in memory if you have many coming in.

   # Flush if this many points get buffered

   # 批量size，默认值：5000

   # batch-size = 5000

   # number of batches that may be pending in memory

   # 配置在内存中等待的batch数，默认值：10

   # batch-pending = 10

   # Flush at least this often even if we haven't hit buffer limit

   # 超时时间，默认值："1s"

   # batch-timeout = "1s"

   # UDP Read buffer size, 0 means OS default. UDP listener will fail if set above OS max.

   # udp读取buffer的大小，0表示使用操作系统提供的值，如果超过操作系统的默认配置则会出错。 该配置的默认值：0

   # udp-read-buffer = 0

   ### This string joins multiple matching 'measurement' values providing more control over the final measurement name.

   #多个measurement间的连接符，默认值： "."

   # separator = "."

   ### Default tags that will be added to all metrics.  These can be overridden at the template level

   ### or by tags extracted from metric

   # tags = ["region=us-east", "zone=1c"]

   ### Each template line requires a template pattern.  It can have an optional

   ### filter before the template and separated by spaces.  It can also have optional extra

   ### tags following the template.  Multiple tags should be separated by commas and no spaces

   ### similar to the line protocol format.  There can be only one default template.

   # templates = [

   #   "*.app env.service.resource.measurement",

   #   # Default template

   #   "server.*",

   # ]

 ###

 ### [collectd]

 ###

 ### Controls one or many listeners for collectd data.

 ###

 [[collectd]]

   # 是否启用该模块，默认值 ：false

   # enabled = false

   # 绑定地址，默认值： ":25826"

   # bind-address = ":25826"

   # 数据库名称，默认值："collectd"

   # database = "collectd"

   # 存储策略，无默认值

   # retention-policy = ""

   #

   # The collectd service supports either scanning a directory for multiple types

   # db files, or specifying a single db file.

   # 路径，默认值："/usr/share/collectd/types.db"

   # typesdb = "/usr/local/share/collectd"

   #

   # security-level = "none"

   # auth-file = "/etc/collectd/auth_file"

   # These next lines control how batching works. You should have this enabled

   # otherwise you could get dropped metrics or poor performance. Batching

   # will buffer points in memory if you have many coming in.

   # Flush if this many points get buffered

   # batch-size = 5000

   # Number of batches that may be pending in memory

   # batch-pending = 10

   # Flush at least this often even if we haven't hit buffer limit

   # batch-timeout = "10s"

   # UDP Read buffer size, 0 means OS default. UDP listener will fail if set above OS max.

   # read-buffer = 0

   # Multi-value plugins can be handled two ways.

   # "split" will parse and store the multi-value plugin data into separate measurements

   # "join" will parse and store the multi-value plugin as a single multi-value measurement.

   # "split" is the default behavior for backward compatibility with previous versions of influxdb.

   # parse-multivalue-plugin = "split"

 ###

 ### [opentsdb]

 ###

 ### Controls one or many listeners for OpenTSDB data.

 ###

 [[opentsdb]]

   # 是否启用该模块，默认值：false

   # enabled = false

   # 绑定地址，默认值：":4242"

   # bind-address = ":4242"

   # 默认数据库："opentsdb"

   # database = "opentsdb"

   # 存储策略，无默认值

   # retention-policy = ""

   # 一致性级别，默认值："one"

   # consistency-level = "one"

   # 是否开启tls，默认值：false

   # tls-enabled = false

   # 证书路径，默认值："/etc/ssl/influxdb.pem"

   # certificate= "/etc/ssl/influxdb.pem"

   # Log an error for every malformed point.

   # 出错时是否记录日志，默认值：true

   # log-point-errors = true

   # These next lines control how batching works. You should have this enabled

   # otherwise you could get dropped metrics or poor performance. Only points

   # metrics received over the telnet protocol undergo batching.

   # Flush if this many points get buffered

   # batch-size = 1000

   # Number of batches that may be pending in memory

   # batch-pending = 5

   # Flush at least this often even if we haven't hit buffer limit

   # batch-timeout = "1s"

 ###

 ### [[udp]]

 ###

 ### Controls the listeners for InfluxDB line protocol data via UDP.

 ###

 [[udp]]

   # 是否启用该模块，默认值：false

   # enabled = false

   # 绑定地址，默认值：":8089"

   # bind-address = ":8089"

   # 数据库名称，默认值："udp"

   # database = "udp"

   # 存储策略，无默认值

   # retention-policy = ""

   # InfluxDB precision for timestamps on received points ("" or "n", "u", "ms", "s", "m", "h")

   # 时间精度，无默认值

   # precision = ""

   # These next lines control how batching works. You should have this enabled

   # otherwise you could get dropped metrics or poor performance. Batching

   # will buffer points in memory if you have many coming in.

   # Flush if this many points get buffered

   # batch-size = 5000

   # Number of batches that may be pending in memory

   # batch-pending = 10

   # Will flush at least this often even if we haven't hit buffer limit

   # batch-timeout = "1s"

   # UDP Read buffer size, 0 means OS default. UDP listener will fail if set above OS max.

   # udp读取buffer的大小，0表示使用操作系统提供的值，如果超过操作系统的默认配置则会出错。 该配置的默认值：0

   # read-buffer = 0

 ###

 ### [continuous_queries]

 ###

 ### Controls how continuous queries are run within InfluxDB.

 ###

 [continuous_queries]

   # Determines whether the continuous query service is enabled.

   # enabled = true

   # Controls whether queries are logged when executed by the CQ service.

   # 是否开启日志，默认值：true

   # log-enabled = true

   # Controls whether queries are logged to the self-monitoring data store.

   # query-stats-enabled = false

   # interval for how often continuous queries will be checked if they need to run

   # 时间间隔，默认值："1s"

   # run-interval = "1s"

 ###

 ### [tls]

 ###

 ### Global configuration settings for TLS in InfluxDB.

 ###

 [tls]

   # Determines the available set of cipher suites. See https://golang.org/pkg/crypto/tls/#pkg-constants

   # for a list of available ciphers, which depends on the version of Go (use the query

   # SHOW DIAGNOSTICS to see the version of Go used to build InfluxDB). If not specified, uses

   # the default settings from Go's crypto/tls package.

   # ciphers = [

   #   "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305",

   #   "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",

   # ]

   # Minimum version of the tls protocol that will be negotiated. If not specified, uses the

   # default settings from Go's crypto/tls package.

   # min-version = "tls1.2"

   # Maximum version of the tls protocol that will be negotiated. If not specified, uses the

   # default settings from Go's crypto/tls package.

   # max-version = "tls1.2"

 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.

   -type 'influxql|flux'

        Type specifies the query language for executing commands or when invoking the REPL.

   -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