InfluxDB is a Time Series database and is built to handle high write and query loads. . Select Combine Queries from the menu and then select Merge from the submenu. I tried to use a continuous query as an intermediate step but I just can't seem to get it to work. I was recording data in my db with home assistant and everything was working great. InfluxDB runs vampires_1every 30 minutes (the same interval as the GROUP BY time()interval) and it computes two queries per run: Without the RESAMPLEclause, InfluxDB would compute the query for only one 30 minute interval, that is, where time is between now()and now() - 30m. Also, some of the time series data are actually measured down to the precision level of micro-seconds. Also, some of the time series data are actually measured down to the precision level of micro-seconds. With Flux you will be able to do this. It uses a HTTP Representational State Transfer (REST) API for querying data as well as an SQL-like query language known as InfluxQL. Tag data for fast and efficient queries. We plunged into multiple databases and data sources, retention policies and tag filters. Select the cell in the SoldBy table and create a query, by clicking Data -> From Table/Range. Among some of InfluxDB's most interesting features is the ability to query multiple measurements with a single query using a regex in the FROM clause. Then, since the field names are the same, they need to be renamed. This field is the common field for both queries and Grafana will now display both metric series in one row! Bar gauge panel. (With "start" and "stop" as tags/fields) I currently use the elapsed () -function to calculate the time difference/duration of my value Include option to show detailed logs for Flux queries, including the following log fields: compiler_type: Compiler used for processing the query (will always be Flux). A variable with multiple values would, in this case, be interpolated as {host1,host2,host3} if the current variable value was host1, host2, and host3. Now, let's check out a few other ways we can utilize the stat panel. for example, we have data from phone sensor information, such as proximeter, GPS, etc., we would like to combine the data from proximeter and GPS together. I managed to find this post which has the answer. Store billions of data points. I could combine them, like this next example. Query A: SELECT MAX(rx) AS packets FROM interface WHERE instance = 'bond0' and type = 'if_packets' AND time >. . The critical fix that halved our query time however was splitting our measurements. . In this blog post, we will take a stepwise approach to building the necessary queries in Flux-InfluxDB, while displaying the intermediate results. The InfluxDB input node only has the InfluxDB server information. It's quite similar to the previous gauge panel we discussed but now we're displaying bars instead and this gives us more data in . 0. with these three variables, you can use a simple math operator in the InfluxDB query . I tried to use a continuous query as an intermediate step but I just can't seem to get it to work. Using what tools & exactly how to achieve that? via OPC-UA, with InfluxDB as time-series database. Outflux manages the schema discovery, validation, and creation. e.g. This is even more evident for "heavy" queries where ClickHouse significantly outperforms TimescaleDB and InfluxDB with an exception of two query types: 'groupby-orderby-limit' The last 5 aggregate readings (across time) before a randomly chosen endpoint . I need to merge them all into one database + add a tag with name of original database the data came from so I can query all that data using those tags. TimescaleDB vs. InfluxDB: Purpose built differently for time-series data. MERGE : NO : YES : A feature of InfluxDB to merge results from multiple tables. Imagine a system containing 5 servers (Servers I-V). I felt that it would be nice to use InfluxDB if it has sufficent query features because it can also be used for data persistence. Hi there. This limit of 1,000 is just a default limitation, but Knowi can handle larger loads without any issue, so go ahead and delete the portion of your InfluxDB which says "limit . Default is service.check_command, but i think it works better when i use service.name. Hence designing it as one measurement . InfluxDB Cloud inserts the params object into the Flux query as a Flux record named params. complicated and depends on how your measurements are set up in InfluxDB and what version of influx you're using. A Javascript function node ("Javascript function node ("Format Influx Results") is used to put the msg.payload into a format that the chart node can use. Flux 0.7.0+ The join () function merges two input streams into a single output stream based on columns with equal values. Image Credit: influxdata, Data schema (TSM & TSI): data elements are stored in time-structured merge tree (TSM) and time series index (TSI) files.TSM can be thought of a LSM tree with write-ahead log (WAL) and read-only files similar to SSTables that are sorted and compressed. additional i changed in the icinga-file influxdb.conf the measurement of services to service.name. So, I compared Norikra and InfluxDB in terms of query features. So now I have a few years of data under the previous name and a new name for all . for CPU and Memory I would have two stat panels. I might be missing something fundamental here since I'm pretty new to InfluxDB so I would really appreciate any help. 0. You should see a new alert at the top of your screen that reads "Tables retrieved. Queries with subqueries (using a "query" dataSource) require one merge buffer if there is a single subquery, or two merge buffers if there is more than one layer of nested subqueries. A Javascript function node ("Javascript function node ("Format Influx Results") is used to put the msg.payload into a format that the chart node can use. Continuous Queries (CQ) are InfluxQL queries that run automatically and periodically on realtime data and store query results in a specified measurement. By default InfluxDB component for Home Assistant uses the database surprisingly named home_assistant, this can be redefined in configuration.yaml. Data series are defined by a time stamp and data value. temperature, humidity, pressure, light level, ..) to InfluxDB 2.0 from a microcontroller running Micropython (I'm using an ESP32). Grafana: 5.0 Backend: influxdb OS: CentOS 6 For a panel, I want to have multiple columns for values from multiple queries. Prometheus (PromQL) query editor. I have now managed to correctly plot my various temperature nodes and alias each line to the entity friendly name string. If not specified the default value from ``InfluxDBClient.org`` is used. InfluxDB Cloud supports Parameterized Queries that let you dynamically change values in a query using the InfluxDB API. Queries with subtotals need one merge buffer. :param WritePrecision write_precision: specifies the precision for the unix timestamps within the body line-protocol. Before you begin setting up Outflux you need to ensure you have 1) a running instance of InfluxDB at a known location and a means to connect to it and 2) TimescaleDB installed and a means to . Combined as above shows empty graph. This data is being gathered from the machine PLCs e.g. . flux-log-enabled. Now to get both metric series combined you need to use the Transform Option beside your Query Builder. " Additionally, since the table is clustered on eventID, blocks are organized so that there are non-overlapping ranges of values for eventID column. ; stat_total_duration: Total duration to process the query. Input functions (read from a source like InfluxDB) 2) Functions that combine or split apart tables in the resulting stream (group, join, window) 3) Functions that get applied to each table in a stream (aggregates, selectors, sorting . The built-in InfluxDB support in Grafana includes a rich query editor that supports both InfluxDB's query languages InfluxQL and Flux. I'm using . Combining data from two databases for home energy optimalization Hi there. Start Merge Process - runs the Process; Insert List Field - The add-in allows the use of a separate list of a single child field to be included. Writing the Flux queries We typically write our Flux queries in Chronograf because it ties in pretty well with Flux's capabilities. (Keep in mind this is a remote instance of InfluxDB, meaning the bulk of that is in connection setup and network latency.) 5, " myisampack Generate Compressed, Read-Only MyISAM Tables". InfluxDB Free Client & Diagram Designer. Here are two query examples: PostgreSQL. TSI is an index on files on disk that InfluxDB memory maps to take advantage of the Least Recently Used (LRU) memory . ; response_size: Size of the response, in bytes. I have just upgraded to the latest version of InfluxDB meaning I am now needing to update my queries in Grafana from InfluxQL to Flux. I have multiple InfluxDB 1.8 databases with same schema but different names of databases. but this works fine if we have different fields from the same measurement, but this does not work (for me) when adding values from different measurements. However, InfluxDB doesn't seem to support combining functions nor nested queries, which is a serious limitation. With InfluxQL support, you can continue to use all your existing dashboards. influxdb is a time series database so it is obvious that we should do it the time-series way. An in-depth look into how two leading time-series databases stack up in terms of data model, query language, reliability, performance, ecosystem, operational management, and company/community support. Group fields of multiple measurements into one record (InfluxDB - Flux - C#) Hot Network Questions I've been putting home utility usage and solar yield metrics into InfluxDB for some time, and want to create a dashboard to help me balance my energy usage to optimize costs. However, InfluxDB doesn't seem to support combining functions nor nested queries, which is a serious limitation. Here's your example: Image Credit: influxdata, Data schema (TSM & TSI): data elements are stored in time-structured merge tree (TSM) and time series index (TSI) files.TSM can be thought of a LSM tree with write-ahead log (WAL) and read-only files similar to SSTables that are sorted and compressed. Hence designing it as one measurement . The Bar Gauge panel is a new visualiztion option that came in Grafana 6.2. BTW - when i split this queries to separate ones - it returns data. Click the "eye" button on the far right to disable them on your graph, and give them an alias. Best, Anais samaust October 9, 2018, 11:55pm #5 If you can change your series format, here's a suggestion. By default InfluxDB component for Home Assistant uses the database surprisingly named home_assistant, this can be redefined in configuration.yaml. . Then I changed the entity_id's of some points in HA which in turn changed the name of the measurement/series in influx. InfluxDB response time reduction using time-scoped queries. Currently data is retained for 3-4 . TSI is an index on files on disk that InfluxDB memory maps to take advantage of the Least Recently Used (LRU) memory . I have multiple InfluxDB 1.8 databases with same schema but different names of databases. Again, if you combine multiple queries in the same panel you can also make use of overrides to customize specific fields. Everthing I've found so far involved HTTP POST methods with building . Current behavior: currently, CQ can only aggregate from a single series For a panel, I want to have multiple columns for values from multiple queries. The query is passed in from the Javascript function node ("New Time Scale") . How do I query the data using flux to combine those two rows? One can use regular expressions to specify tables: Query group : YES . Having understood the basic principles underlying indexing in InfluxDB, let's make things a little more complex. QuestDB also uses columnar data structures but indexes data in vector-based append-only column files. Getting Started with TVPs In order . Choose the ' Outer join ' transformation and choose the Field name 'instance'. The next step is the database. I was hoping someone may be able to . Influxdb and Grafana 7 - Manual queries August 16, 2020; vSphere Performance - Telegraf, InfluxDB and Grafana 7 - More Dashboard Panels August . Flux allows you to join on any columns common between two data streams and opens the door for operations such as cross-measurement joins and math across measurements. I need to merge them all into one database + add a tag with name of original database the data came from so I can query all that data using those tags. Compound query clauses Compound query clauses wrap other leaf or compound queries and are used to combine multiple queries in a logical fashion (such as the bool or dis_max query), or to alter their behaviour (such as the constant_score query). InfluxDB is a time series, metrics, and analytics database. Configure Queries." In order to set up your first query, follow these steps: 1) Click "Queries." 2) Before you do anything else, name your report "InfluxDB Query" in "Report Name*" and then look directly above your report name. InfluxDB is an open-source time-series database or TSDB, designed and developed by the company named InfluxData. So instead of: SELECT <fields> FROM <measurement> WHERE type =~ /^(1|2)$/ GROUP BY __ you can run: Here we register two different measurements (e.g. And with the added support of Flux, you can define complex queries through a set of functional transformations on data and do . Using what tools & exactly how to achieve that? Grafana Temperature data with InfluxDB v2 and Flux. key features. This dropped our query times from 5s (and growing) down to a steady 100ms - 200ms. This property can also be overridden by providing a property measurement in the data message.. To write data you must send an MQTT message, to the /set topic of the Endpoint, like the following (with a . InfluxDB and Kafka have become a popular combination because of the need for a data store that can scale alongside Kafka. This issue has been raised.