For more information on using the SHOW STATS command, see Using the SHOW STATS command to monitor InfluxDB. String literals must be surrounded by single quotes. cursor_cond: Condition cursor created for fields referenced in a WHERE clause. There was no need for elaborate technical training because the majority of women, in contrast to the seventeen- and eighteen- year-old boys being inducted, had a usable skill before they enlisted, often in … Dedupe Iterator - This iterator only outputs unique points. This legacy format is still supported in the new backup utility as input for the new online restore function. before performing the calculation. Once the data and metastore are recovered, start the database: As a quick check, you can verify that the database is known to the metastore For example, the command: Will create a metastore backup in the directory /tmp/backup (the InfluxDB rejects writes with time as a field key or tag key and returns an error. cursor_aux: Auxiliary cursor created for simple expression projections (not selectors or an aggregation). See the specific SHOW CARDINALITY commands for details: Displays node information, such as build information, uptime, hostname, server configuration, memory usage, and Go runtime diagnostics. If you use an InfluxQL keywords as an queries. The offline backup and restore utilities in InfluxDB OSS versions 1.4 and earlier are deprecated, but are documented below in Backward compatible offline backup and restore. In those cases, time does not require double quotes in queries. -- Note: Unlike the GRANT statement, the "PRIVILEGES" keyword is required here. Filtering by time is only supported when TSI (Time Series Index) is enabled. Hexadecimal and octal literals are not currently supported. In the real-world example above, we backed up the. If specified, then -db and -rp are required. Important: If -portable is not specified, the default legacy backup utility is used – only the host metastore is backed up, unless -database is specified. wrapped with another CountIterator to compute the count of all shards. Filtering by time is not supported in the WHERE clause. Backup files that can be imported into an InfluxDB Enterprise database. To see which shards are available, you can run the command Estimates or counts exactly the cardinality of the series for the current database unless a database is specified using the ON option. wrapped at multiple layers to improve efficiency. Sideload into the target database and drop the temporary database. Shows the amount of time the query took to execute, including reading the time series data, performing operations as data flows through iterators, and draining processed data from iterators. for the stored data to be restored to. specific date, where the date must be in Each database must be backed up individually. If not using -portable, review Backup (legacy) below for expected behavior. be performed at the shard level and then multiple CountIterators can be When restoring data, you are likely to see data that is outside of the specified time periods. The keyword time is a special case. Use comments with InfluxQL statements to describe your queries. This makes it slower than the MergeIterator Once you understand the language itself, it’s important to know how these database name, take incremental backups of your database. Note: If you have automated backups based on the legacy format, consider using the new online feature for your legacy backups. influx -username admin -password SuperSecretPassword123+ -host localhost If you ran into any problems, please refer to the InfluxDB documentation and use google to find more in-detail tutorials. Requires that -rp is set. Required for remote connections. DERIVATIVE(). If not specified, then the value for -db is used. Note: ON , FROM , WITH KEY = , WHERE , GROUP BY , and LIMIT/OFFSET clauses are optional. for aggregate queries which do not need stronger sorting guarantees. a window. This flag is important if you would like to See the InfluxDB OSS 2.0 release notes. such as returning a precomputed COUNT(). language constructs are implemented in the query engine. -online: Use the legacy backup format. This option is required if no -metadir option If duplicate data points are included in the backup files, the points will be written again, overwriting any existing data. restored. | integer | 64-bit signed integer | Since most blocks are highly compacted, extracting each block to inspect each point creates both a computational and disk-space burden on the running system. Buffered Iterator - This iterator provides the ability to “unread” a point Batch mode utilizes a separate thread pool. Notation operators in order of increasing precedence: InfluxQL is Unicode text encoded in UTF-8. points: These iterators are created through the IteratorCreator interface: The IteratorOptions provide arguments about field selection, time ranges, Planning a query in InfluxDB requires a number of steps. When the window is complete then all points for that window are Option to run backup and restore functions on online (live) databases. Highly recommended for all InfluxDB OSS users. Index memory use is not reported with, A single line comment begins with two hyphens (. Statistics returned by SHOW STATS are stored in memory and reset to zero when the node is restarted, but SHOW STATS is triggered every 10 … the system, including user information, database and shard metadata, continuous queries, retention policies, and subscriptions. Thank you for being part of our community! -retention - This is the target retention policy For example, executing the following statement: May produce an output similar to the following: Note: EXPLAIN ANALYZE ignores query output, so the cost of serialization to JSON or CSV is not accounted for. Use the backup and restore utilities to back up and restore between influxd instances with the same versions or with only minor version differences. Not so coincidentally, InfluxDB is written in Go. The emitter’s job is to convert simple time/value points into the time can be a WHERE clause, Execution time doesn’t include the time taken to serialize the output into JSON or other formats. restore the data to. This is used for aggregate functions such as InfluxDB OSS 2.0 is now generally available and ready for production use. Duration literals specify a length of time. See the equivalent InfluxDB v2.0 documentation: Back up and restore data. the path to where the backup should be restored, and the path to the backup. directory where you would like the metastore backup recovered [ -rp ]: Name of the retention policy from the backup that will be restored. However, this iterator guarantees Shard, and Engine. packaged installations, this should be specified as field in the statement. As a real-world example, you can take a backup of the autogen retention policy for the telegraf database since midnight UTC on February 1st, 2016 by using the command: To backup a database, add the -database flag: Where is the name of the database you would like to The optional flags for restoring a backup are: -database - This is the database that you would like to iterator. For example, you can back up from 1.7.3 and restore on 1.8.2. Group filtered series keys into tag sets based on the GROUP BY dimensions. When using these query clauses, the query falls back to an exact count. Refers to the group of commands used to estimate or count exactly the cardinality of measurements, series, tag keys, tag key values, and field keys. This allows optimizations to be performed when applicable The legacy backup mode also supports live, remote backup functionality. The AST is passed to the QueryExecutor which directs queries to the Alexander Hamilton (January 11, 1755 or 1757 – July 12, 1804) was an American statesman, politician, legal scholar, military commander, lawyer, banker, and economist. Use this statement to analyze query performance and storage, including execution time and planning time, and the iterator type and cursor type. new iterator of the same type. [ -portable ]: Generates backup files in the newer InfluxDB Enterprise-compatible format. This gives you an Consider the following cursor types when tuning a statement: For more information about cursors, see Understanding cursors. The following block types are supported: | float | 64-bit IEEE-754 floating-point number | The InfluxDB OSS backup utility provides: InfluxDB Enterprise users: See Backing up and restoring in InfluxDB Enterprise. EXPLAIN ANALYZE separates storage block types, and reports the total number of blocks decoded and their size (in bytes) on disk. For example, this is an iterator over Float and then passes them all to a reduction function at once. all shards will be backed up. retrieve the host associated with that point. Therefore, if we wish to take advantage of downsampling with multiple retention policies, creating batches is the way to go. This is used extensively Each data block is annotated with starting and ending timestamps for the time interval included in the block. statement’s time range. retention policy for the telegraf database since midnight UTC on If used without -start, all data will be backed up starting from 1970-01-01. Shows the amount of time the query took to plan. Recommended instead of -online. Command & Conquer: Rivals is a mobile RTS title published by Electronic Arts, announced on 9 June 2018 during EA Play. The InfluxDB metastore contains internal information about the status of InfluxDB is an open source time series database for recording metrics, events, and analytics. It is resource Filtering by time is only supported when TSI (Time Series Index) is enabled and time is not supported in the WHERE clause. If not specified, steps. [ -newdb ]: Name of the database into which the archived data will be imported on the target system. until it is passed to the emitter where the fields get split off to their own to. InfluxDB OSS 2.0 is now generally available and ready for production use. returned from the iterator. Parses and plans the query, and then prints a summary of estimated costs. InfluxDB v2.0 is the latest stable version. If not specified, all timeranges within the database will be backed up. For example, queries related to meta data are executed data at the same time with the selected point. InfluxDB Studio is a UI management tool for the InfluxDB time series database.. Its inspiration comes from other similar database management tools such as SQL Server Management Studio and Robomongo.Under the hood it's powered by InfluxData.Net which is a portable InfluxDB client library for .NET (plus some Kapacitor support). Note: The password string must be wrapped in single quotes. This is used for executing binary expressions. | unsigned | 64-bit unsigned integer | This flag can be used to backup a specific retention policy. Following the backup example above, the backup can be restored in two Oddar Meanchey province received $100,000, 500 kits and 1,000 cases of pure water and Pailin province received $125,000 with 1,000 cases of pure water and 1,000 cases of instant noodles. -since - This flag can be used to create a backup since a provide ordering guarantees within the window. If not specified, all from an input iterator. Estimates or counts exactly the cardinality of the measurement set for the current database unless a database is specified using the ON option. LAST(), MIN(), and MAX(), the engine must provide a way to return related [ -since ]: Perform an incremental backup after the specified timestamp RFC3339 format. back onto a buffer so it can be read again next time. Note: The backward compatible backup and restore for InfluxDB OSS documented below are deprecated. For more information, see InfluxDB OSS URLs. Filtering by time is only supported when Time Series Index (TSI) is enabled on a database. For example. NOTE: Users can be granted privileges on databases that do not yet exist. Default value is '127.0.0.1:8088'. | boolean | 1-bit, LSB encoded | The results are iterators can be created using NewCallIterator(). Estimates or counts exactly the cardinality of tag key set on the current database unless a database is specified using the ON option. | string | UTF-8 string |. 2015-12-24T08:12:23Z). Note: Restoring from backup is only supported while the InfluxDB daemon is stopped. the input iterator. A cursor sorts the (time, value) tuples by time in ascending or descending order. Estimated values are calculated using sketches and are a safe default for all cardinality sizes. The SHOW STATS command does not list index memory usage – use the SHOW STATS FOR 'indexes' command. within a window will be output before starting the next window but does not Next, for each shard and each measurement, InfluxDB performs the following steps: EXPLAIN ANALYZE supports the following iterator types: For more information about iterators, see Understanding iterators. Since InfluxQL does not support joins, the cost of a InfluxQL query is typically a function of the total series accessed, the number of iterator accesses to a TSM file, and the number of TSM blocks that need to be scanned. For information about upgrading to InfluxDB OSS 2.0, see: Backing up and restoring in InfluxDB Enterprise, Backward compatible offline backup and restore, Upgrade from InfluxDB 2.0 beta to InfluxDB 2.0. user name. manifest (JSON file) describes collected backup data: 20060102T150405Z.manifest. Before we enqueue individual points, we need to set a database (similar to the use command in SQL) and set a default retention policy. Note: Once the backed up data has been recovered, the permissions on the shards may no longer be accurate. =~ matches against For example, a statement want the backup to be written to. -- REPLICATION (replication factor) not valid for OSS instances. They provide a simple interface A query is composed of one or more statements separated by a semicolon. Estimates or counts exactly the cardinality of the field key set for the current database unless a database is specified using the ON option. metastore. Not compatible with -since. Iterators are passed to the emitter which drains them and joins the resulting double quote that identifier in every query. The influx of 27,000 recruits did not pose a major training problem for the AAF. Two types of data can be backed up, the metastore and the metrics themselves. It is specified using Go’s date / time parsing format, which is a reference date written in the format required by InfluxQL. For more information on using the SHOW DIAGNOSTICS command, see Using the SHOW DIAGNOSTICS command for monitoring InfluxDB. The online backup and restore processes execute over a TCP connection to the database. more complex result objects that are returned to the client. Where query_id is the query ID, displayed in the SHOW QUERIES output as qid. A lot has changed in Bollywood over the last 20 years, and that can be accredited with the rise of internet, which blurred the national boundaries in terms of global exposure. These For more information, see InfluxDB OSS URLs. intuitive sense for how results will be processed and how to create efficient The syntax is specified using Extended Backus-Naur Form (“EBNF”). If not specified, the default is to use all retention policies. Note: InfluxQL supports using regular expressions when specifying: Currently, InfluxQL does not support using regular expressions to match All backups are full backups; incremental backups are not supported. If an emergency circumstance exists, please contact us at 478-327-5666, option 1. [ -newrp ]: Name of the retention policy to be created on the target system. Returns an estimate of memory use of all indexes. When using these query clauses, the query falls back to an exact count. !~ doesn’t match against. As a real-world example, you can take a backup of the autogen The influxdb-python distribution is supported and tested on Python 2.7, 3.5, 3.6, 3.7, PyPy and PyPy3. Reduce Slice Iterator - This iterator collects all points for a window first To restore a backup, you will need to use the influxd restore command. iterator. Exact values are counts directly from TSM (Time-Structured Merge Tree) data, but are expensive to run for high cardinality data. time ordering of every point. but this ordering guarantee is required for non-aggregate queries which Find Influx Query Language (InfluxQL) definitions and details, including: To learn more about InfluxQL, browse the following topics: InfluxQL is a SQL-like query language for interacting with InfluxDB and providing features specific to storing and analyzing time series data. For example, a query that evaluates one field for 1,000 series over 3 shards constructs a minimum of 3,000 cursors (1,000 per shard). is provided. -- selects from DEFAULT retention policy and writes into 6_months retention policy, -- this selects from the output of one continuous query in one retention policy and outputs to another series in another retention policy, -- this customizes the resample interval so the interval is queried every 10s and intervals are resampled until 2m after their start time, -- when resample is used, at least one of "EVERY" or "FOR" must be used, -- Create a database called bar with a new DEFAULT retention policy and specify the duration, replication, shard group duration, and name of that retention policy, -- Create a database called mydb with a new DEFAULT retention policy and specify the name of that retention policy. If specified, then -database is required. INTO statement) into the existing target database and drop the temporary database. To ensure the file permissions are correct, please run this command: $ sudo chown -R influxdb:influxdb /var/lib/influxdb. data. This is the implementation of the LIMIT & OFFSET syntax. available in the SHOW QUERIES output. [ -shard ]: Shard ID of the shard to be restored. subscription name, and The new backup utility lets you restore a single database to a live (online) instance, while leaving all existing data on the server in place. InfluxDB OSS has the ability to snapshot an instance at a point-in-time and restore it. -- drop the retention policy named 1h.cpu from mydb, -- kill query on InfluxDB Enterprise cluster, -- revoke read privileges from jdoe on mydb, -- show estimated cardinality of the field key set of current database, -- show exact cardinality on field key set of specified database, -- show field keys and field value data types from all measurements, -- show field keys and field value data types from specified measurement, -- show estimated cardinality of measurement set on current database, -- show exact cardinality of measurement set on specified database, -- show measurements where region tag = 'uswest' AND host tag = 'serverA', -- show measurements that start with 'h2o', -- show all retention policies on a database, -- show estimated cardinality of the series on current database, -- show estimated cardinality of the series on specified database, -- show series cardinality of the series on specified database, ---------- -------- ------------------ ------------------- --------- ---------, -- show all tag keys from the cpu measurement, -- show all tag keys from the cpu measurement where the region key = 'uswest', -- show all tag keys where the host key = 'serverA', -- show all tag values across all measurements for the region tag, -- show tag values from the cpu measurement for the region tag, -- show tag values across all measurements for all tag keys that do not include the letter c, -- show tag values from the cpu measurement for region & host tag keys where service = 'redis', -- show estimated tag key values cardinality for a specified tag key, -- show exact tag key values cardinality for a specified tag key, Using the SHOW DIAGNOSTICS command for monitoring InfluxDB, Using the SHOW STATS command to monitor InfluxDB, Upgrade from InfluxDB 2.0 beta to InfluxDB 2.0, double quoted identifiers can contain any unicode character other than a new line, double quoted identifiers can contain escaped, double quoted identifiers can contain InfluxQL, unquoted identifiers must start with an upper or lowercase ASCII character or “_”, unquoted identifiers may contain only ASCII letters, decimal digits, and “_”. Thank you for being part of our community! databases, and -portable: Use the new Enterprise-compatible backup format for InfluxDB OSS. The reference date time is: InfluxQL reference date time: January 2nd, 2006 at 3:04:05 PM, Comparators: February 1st, 2016 by using the command: Which will send the resulting backup to /tmp/backup, where it can This offline restore method described here may result in data loss – it clears all existing databases on the server. Customize your InfluxDB OSS URL and we’ll update code examples for you. to provide lookahead for windowing. To backup all databases recently changed at the filesystem level. The metrics are backed up on a per-database basis in an operation separate from the metastore backup. composed so that they provided additional functionality around an input themselves. set. -shard - This is the shard data that should be Without any other arguments, For information about upgrading to InfluxDB OSS 2.0, see: -- Set default retention policy for mydb to 1h.cpu. The command: The required flags for restoring a backup are: -metadir - This is the path to the meta This is the code representation of the query itself. Nicosia is the country's capital and largest city. InfluxDB Enterprise clusters: To kill queries on a cluster, you need to specify the query ID (qid) and the TCP host (for example, myhost:8088), This is a good time to start injecting data into your InfluxDB for later testing with Grafana. Note: Prior to InfluxDB OSS 1.5, the backup utility created backup file formats incompatible with InfluxDB Enterprise. value, or points with a specific value. Usually they're trying to import or transfer large amounts of data and want to make sure it can be inserted into the database quickly enough for their business needs. timeranges within the database will be backed up. See Frequently Asked Questions for more information. Exponents are not currently supported. RFC3339 format (for example, Unless required, use the estimated variety. This composition also lends itself well to aggregation. If you attempt to run the restore command into an existing database, you will get a message like this: Restore the existing database backup to a temporary database. Estimates or counts exactly the cardinality of tag key values for the specified tag key on the current database unless a database is specified using the ON option. each time window for an input iterator. retention policy name, the backup will only record the current state of the system This allows for fast access From these shards, iterators are created for each into a new iterator of the same type. For more information on retention policies, see. NOTE 1: Common Access Cards (CACs) do not fall under the Online ID card process at this time. EBNF is the same notation used in the Go programming language specification, which can be found here. InfluxDB v2.0 is the latest stable version. backup generates an InfluxDB Enterprise-compatible format with filtering options to constrain the range of data points exported to the backup. We welcome and encourage your feedback and bug reports for InfluxDB and this documentation. If not specified, then the -rp value is used. Note: Metastore backups are also included in per-database backups. [ -db | -database ]: Name of the database to be restored from the backup. Durations can be specified with mixed units. specify a single typed Value for efficiency, we push the host into the output. Only use if the newer -portable option cannot be used. Iterators are at the heart of the query engine. For Because InfluxQL allows users to use selector functions such as FIRST(),
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