Grafana Documentation

x for monitoring. Welcome! Let's get started now or check our list of sensors to see if your technology stack is supported. Strong application process flow and technical problem-solving skills. Update the OpenTSDB Data Source For Grafana. ## Install and run Grafana Grafana comes with OS-specific installation packages; feel free to pick the one that is for your OS and follow the installation documentation. About Grafana-Zabbix; Feature Highlights; Installation. Grafana is an open source metric analytics and visualization suite, commonly used for visualizing time series data. A collection of predefined Grafana dashboards contains graphs on particular endpoints. To create a dashboard, follow these steps: Log in to your Grafana instance. x waylay datasource is fully compatible with default table that comes with grafana. By the end of the article, you should be ready to use Grafana to create your own custom APM views. Performance monitoring support enables a Mattermost server to track system health for large Enterprise deployments through integrations with Prometheus and Grafana. grafana_ossstable. Adding an Export Rule. grafana Documentation Release latest Jul 25, 2017. Most functions are applied to one series list. Grafana was primarily built to perform time series analytics. Only some data sources are supported right now. Screencasts. 3 or higher. tld enable_gzip = true root_url = https://grafana. /bin/grafana-server web. The downloadable package includes dull instructions to get Grafana with InfluxDB working with ClustrixDB and are summarized here:. To create a Grafana dashboard, complete the following steps: Log in to the Cloud Control Panel with your username and password. 0 (a)Select Local MySQL if you want to create the Grafana database using the MySQL server of the OpenStack control plane. Below are some case study overviews and links on specific use cases of this twin solution. Latest version is v1. As Prometheus and Grafana become increasingly popular, combining these technologies to monitor Swarm has been a common request from our community. Since version 4. It includes built-in support to various types of data sources, such as Prometheus, Elasticsearch and so on. Grafana is an open source platform for analytics and monitoring. Grafana was primarily built to perform time series analytics. Select metrics from dropdown or start to type to filter results. Grafana uses the existing performance data files (RRD) to generate the graphs, this allows you to extend Nagios XI to use Grafana without any custom modifications that may break Nagios XI. https://106c4. Monitoring, reporting & alerting using leading tools such as Prometheus, Grafana, etc. Use these instructions to create your first dashboard in Grafana, and start creating graphs/charts. Running Grafana behind a reverse proxy API Tutorial: How To Create API Tokens And Dashboards For A Specific Organization Grafana with IIS Reverse Proxy on Windows. Functions with the parameter *seriesLists can take an arbitrary number of series lists. Performance Monitoring (E20) ¶ Available in Enterprise Edition E20. To share dashboards without the need for authentication using a D-PHYS Account, for example to present it on a kiosk-style monitor, you can create a snapshot. series analytics. This will be our first series on how to do smart monitoring and visualization of your entire Infrastructure. The grafana-server binary needs the working directory to be the root install directory (where the binary and the public folder is located). With grafana 4. You'll do this by using helm, the package manager for Kubernetes, and the Grafana chart. If you’ve never used Graphite before, take a look at the Getting Started guide to get a quick overview of how to start sending metrics. Grafana is an open-source visualization and alerting tool that you can use for analytics and monitoring of time-series data (metrics). Latest version is v1. Cisco dCloud. Terms & acronyms Definition The Collector The StackLight Collector is a smart monitoring agent running on every node. Grafana does not use a lot of resources and is very lightweight in use of memory and CPU. juju run-action --wait grafana/0 delete-user login=john Auth proxy. Grafana accesses data via Data Sources. Instance Monitoring. com "Filter" option to browse dashboards for the "Prometheus" data source only. Manage and analyze Network Security Group flow logs using Network Watcher and Grafana. juju run-action --wait grafana/0 delete-user login=john Auth proxy. It supports several backend data stores, including InfluxDB. com maintains a collection of shared dashboards which can be downloaded and used with standalone instances of Grafana. And the last thing for today – a few examples of how we can make search and filter results in Grafana. This topic provides instructions for installing, configuring, and using Oracle Cloud Infrastructure Data Source for Grafana, otherwise referenced as the Grafana Plug-in. Find manuals for ArangoDB, AQL, Foxx and many other useful resources. Use the following steps to set up a Grafana server and build dashboards for metrics and logs from Azure Monitor. Add On: Grafana on InfluxCloud. If you need to have your data collected on one point and present it in a professional manner, I highly recommend Grafana. The StackLight InfluxDB-Grafana Plugin for Fuel Documentation, Release 1. deb sudo apt-get update sudo apt-get install grafana sudo service grafana-server start sudo update-rc. Search for: Search Search. The Grafana plugin is one of them. Grafana is an open source, feature rich metrics dashboard and graph editor for Graphite, InfluxDB & OpenTSDB. This includes the ability to manage dashboards, datasources, orginizations, plugins and users with Chef using Custom Resources. Here’s a minimal deployment configuration to get you started. 0-beta2) had a lot of improvements in its user interface, it also supports now alerting and notifications for every panel available – refer to the documentation for more information. Bitnami Grafana Stack Single-Tier Bitnami Cloud Images extend stack appliances to run in a cloud computing environment. You can use this feature to create generic dashboards in which you can quickly change servers or metrics. Do not set any graph_url, this is only required for integrating other graphing addons. Otherwise the value will not be saved. These flow logs show outbound and inbound flows on a per NSG rule. org: Live Demo; tyler-wright. In order to receive alerts from Grafana, you need to configure a notification channel. At the Microsoft //build 2016 conference this year we created some great labs for the attendees to work on. Stockholm, Sweden. Grafana ¶ A beautiful, easy to use and feature rich Graphite dashboard replacement and graph editor. com maintains a collection of shared dashboards which can be downloaded and used with standalone instances of Grafana. The InfluxDB-Grafana Plugin comes with a collection of predefined dashboards you can use to visualize the time-series stored in InfluxDB. ; If you’re familiar with Graphite, or want to know how our version works, read on to find out how Hosted Graphite differs from vanilla Graphite. Performance monitoring support enables a Mattermost server to track system health for large Enterprise deployments through integrations with Prometheus and Grafana. This only works for http backends and if cookie auth is enabled. If you have already installed Grafana on the Ubuntu server, you'll need to edit the grafana. After some time, I found myself browsing the Grafana documentation, and found out that Grafana 4. grafana-zabbix. Please create a /home. Head to docs. Exercise summary: Install Prometheus and Grafana, configure IDM to provide monitoring statistics and experiment with the sample dashboard available on backstage. Open Sending feedback to the Alfresco documentation team. As a result, you can use Direct Docker Image Deploy to easily deploy Grafana on Aptible Deploy. Add On: Kapacitor on InfluxCloud. Multi-container Docker app with InfluxDB, Chronograf, and Grafana - jkehres/docker-compose-influxdb-grafana see the Grafana documentation and add a config file to. InfluxDB is a time series database designed to handle high write and query loads. Copper COA Medal Zheng Bao 2019 PF70 Peking Opera Mintage:189 Copper China NGC COA. When running Grafana master in production we strongly recommend that you use the grafana/grafana-dev:master- tag as that will guarantee that you use a specific version of Grafana instead of whatever was the most recent commit at the time. # Cognite Grafana plug-in. To pass multiple series lists to a function which only takes one, use the group() function. Depending on what features are being used and to what extent the requirements varies. Performance Monitoring (E20) ¶ Available in Enterprise Edition E20. GitLab writes performance data to InfluxDB and Grafana will allow you to query to display useful graphs. Add On: Enhanced Support on InfluxCloud. Splunk/ELK knowledge also beneficial. Please check out Grafana's documentation for more notification type supports. If you ran into any problems, please refer to the Grafana documentation and use google to find more in-detail tutorials. In order to simplify the installation process, we created detailed guides for you to follow: Install Grafana and the Oracle Cloud Infrastructure Data Source for Grafana on a Linux host using this document. Operations for important aspects of. To use Grafana with ClustrixDB, you'll need to export data into time series format that Grafana understands. yarn add @grafana/ui. Grafana is an analytics platform that enables you to query and visualize data, then create and share dashboards based on your visualizations. 8 Installation, Upgrade & Configuration when grafana_api_key is set, the options grafan_user, grafana_password and grafana_org_id are ignored. I'm happy to announce that I have finally gotten around to doing just that. After some time, I found myself browsing the Grafana documentation, and found out that Grafana 4. After about a month, we'd solved the major bugs, become production-ready, and have been fielding feature requests from the community ever since. Grafana allows you to query, visualize, alert on and understand your metrics no matter where they are stored. 3Install from source Alternatively, you may want to build the RPM file of the plugin from source if, for example, you want to test the latest features of the master branch or customize the plugin. After each time you change a color through a color picker you must click on empty space anywhere outside the color picker. Most functions are applied to one series list. 0 and higher. Learn the basics of using Grafana. deb sudo apt-get update sudo apt-get install grafana sudo service grafana-server start sudo update-rc. Ever since the first time I used it, I have wanted to sit down and write a server which would provide metrics to it through the Simple JSON datasource plugin. Logged in to the Grafana dashboard, go to "Data Sources" and create a new source pointing to your InfluxDB database, providing the credentials you chose earlier. Nutone IR-105 Kit 784891983641,Bulgin 6000 Series Female Dust Cap, Shell Size 32mm IP66, IP68, IP69K Rated, wit,75ft 20 Amp 125 Volt NEMA L5-20P to NEMA L5-20R Extension Cord by AC WORKS®. Kind StatefulSet Grafana In order to be able to deploy Grafana consistently in this example, we use the. Deploying the Grafana App¶ Grafana is available as a Docker image and can be configured using environment variables. With support for grafana 4. Introduction []. grafana Documentation, Release latest This is an autogenerated index file. Data points are linked to locations on the map by matching part of the metric name to a key in the set of 'Location Data'. Prometheus is a third-party tool used for gathering and processing monitoring data. Where you want it. Grafana uses the existing performance data files (RRD) to generate the graphs, this allows you to extend Nagios XI to use Grafana without any custom modifications that may break Nagios XI. It's focused on providing rich ways to visualize time series metrics, mainly though graphs but supports other ways to visualize data through a pluggable panel architecture. OpenStack runs Graphite which stores all the metrics related to Nodepool and Zuul (to name a few). It is an integral component of the TICK stack. Any change made by administrator should be careful. Functions with the parameter *seriesLists can take an arbitrary number of series lists. The ArangoBackup Operator creates and maintains ArangoBackups in a Kubernetes cluster, given a Backup specification. 오픈소스 다목적 대시보드, 그래프 작성기; 웹 애프리케이션으로 작동함; 백엔드로 graphite, influxdb, opentsdb 등을 지원함. https://106c4. 4 Quick Start: Installing Graphite and Grafana 2 Installation Preparation With enough effort and expertise Graphite can be installed on pretty much any Linux flavor. Grafana is most commonly used for visualizing time series data for Internet infrastructure and application analytics but many use it in other domains including industrial sensors, home automation, weather, and process control. If you ran into any problems, please refer to the Grafana documentation and use google to find more in-detail tutorials. For this reason, we set up Grafana. In the next step, we install Grafana. The InfluxDB-Grafana plugin for Fuel Documentation, Release 0. Dear Talk² team, Dear Mike, we developed a flexible, generic and open source data acquisition backend around the components outlined in this post, it is based on InfluxDB and Grafana as well and glues things together as it offers multiple ways of multi-tenant data acquisition and automatically creates Grafana dashboards on data arrival, besides other nice things. 0, Grafana is enabled by default and SSO with GitLab is automatically configured. Description. Click on “Metrics”. http_addr = 127. I will go a different way here and install Grafana as a Docker container. 09/15/2017; 5 minutes to read; In this article. Monitoring with Prometheus, Grafana, and Telegraf. Grafana is a nice tool for monitoring and visualizing time series data from many popular datasources. Use the following steps to set up a Grafana server and build dashboards for metrics and logs from Azure Monitor. Our goal is not to have a very extensive documentation but rather have actual code that people can look at. GroundWork 7. Here's a minimal deployment configuration to get you started. Available options include Elasticsearch, MySQL, PostgreSQL, Prometheus and Graphite. grafana Documentation, Release latest This is an autogenerated index file. Use Grafana¶ Grafana is a web service that builds and visually represents metric graphs based on time series databases. Grafana accesses data via Data Sources. Now, TelemetryTV's Grafana App for digital signage allows you to easily deploy and display your dashboards on screen in a couple clicks. rb', line 5 def get_snapshot (key) endpoint = " /api/snapshot/ #{key} " @logger. Grafana Alerting and Email Notifications. 4/Icons/Large. This can also be used to connect to other monitoring systems (Graphite, Collectd, etc…) but since both influxDB and Grafana are hot topics at the moment I decided to follow the trend! I was asked why I was. Select metrics from dropdown or start to type to filter results. For Apache Kafka there are a couple of offerings. Grafana is a powerful dashboard building system that you can use to visualize performance metrics from the embedded Prometheus monitoring system. It supports several backend data stores, including InfluxDB. Deploying the Grafana App¶ Grafana is available as a Docker image and can be configured using environment variables. Grafana uses project ids to proxy to different databases each of these projects could contain a different type of database. First, click on the Grafana spiral icon at the top left of the web page and go to “Admin / Profile”. When running Grafana master in production we strongly recommend that you use the grafana/grafana-dev:master- tag as that will guarantee that you use a specific version of Grafana instead of whatever was the most recent commit at the time. Configure Grafana to use InfluxDB as a data source. Grafana + Rockset is ideal for things like creating visualizations on your Rockset collections and plotting timeseries data. The Prometheus queries in Grafana are written using PromQL (Prometheus Query Language). This webinar provides an overview of the Exporter and demonstrates how to use it with Grafana 6. Most functions are applied to one series list. Grafana Organisation ID in which the datasource should be created. In the Cloudflare Grafana plugin, you can see the response code breakdown of your DNS traffic. Backend Developer on the Systems Team Mojang AB October 2011 – September 2012 1 year. There are also options for how queries are displayed, including graphs, tables. Starting with GitLab 12. com maintains a collection of shared dashboards which can be downloaded and used with standalone instances of Grafana. To install Grafana, we'll create another repository as we did with InfluxDB. Nagios Core - Using Grafana With PNP4Nagios. Within the Grafana user interface navigate to settings and select ‘Data Sources’ under the configuration section. Start Grafana by executing. After you installed and configured Grafana-Zabbix data source let's create a simple dashboard. After some time, I found myself browsing the Grafana documentation, and found out that Grafana 4. How to Monitor Docker Containers using Grafana on Ubuntu August 3, 2016 Updated December 10, 2016 By Saheetha Shameer LINUX HOWTO , MONITORING Grafana is an open source feature rich metrics dashboard. Our goal is not to have a very extensive documentation but rather have actual code that people can look at. A sample walkthrough to setup a Grafana dashboard with Azure Monitor and Application Insights metrics can be found in the Azure Monitor Documentation. I am a beginner in Grafana and I am trying to go through all the tutorial and documentation from Grafana. For additional details on Apache Airflow, see Concepts in the Apache Airflow documentation. 0 with Blueflood datasource. Here's a minimal deployment configuration to get you started. It is an integral component of the TICK stack. Data Collector metrics will be prefixed with streamsets based on our jmxtrans configuration. Connecting Grafana to InfluxDB. Operations for important aspects of. It does not require you to be an it expert to setup and with just few easy steps you can connect to your database or service and present live metric that can help you more deeply understand how your system is used. There is a few steps to get the virtual appliance up and running : Deploy the virtual machine; Download NetApp Harvest and NMSDK from the NetApp web site; Use the web interface to install these products. Enable HTTPS if you are using an on-premises instance of Grafana. All-in-one by docker-compose For all the above setup, I also made a all-in-one docker compose file, if you want to just start all of them and try it in your local, head to my github repository and run docker-compose up. Get an overview of Grafana's key features. http_addr = 127. Kind StatefulSet Grafana In order to be able to deploy Grafana consistently in this example, we use the. After enabling plugin you can add Zabbix data source. Welcome to Monasca's Documentation!¶ The monitoring requirements in OpenStack environments are vast, varied, and highly complex. 3 or higher. Nutone IR-105 Kit 784891983641,Bulgin 6000 Series Female Dust Cap, Shell Size 32mm IP66, IP68, IP69K Rated, wit,75ft 20 Amp 125 Volt NEMA L5-20P to NEMA L5-20R Extension Cord by AC WORKS®. Grafana Configuration. Configure Grafana. ini file to add the Azure Database for MySQL parameters. This webinar provides an overview of the Exporter and demonstrates how to use it with Grafana 6. Hundreds of data teams rely on Stitch to securely and reliably move their data from SaaS tools and databases into their data warehouses and data lakes. In Prometheus-based StackLight LMA, Grafana has the following special aspects: Grafana dashboards do not include annotations based on alerts. Below are some case study overviews and links on specific use cases of this twin solution. Grafana is a tool that allows you to visualize time series metrics through graphs and dashboards. Dash User Guide and Documentation. , MySQL) are not encrypted. It is designed to be easy to deploy and operate through a web interface. The recommended way to monitor your cluster is to use a combination of Prometheus, Grafana and Telegraf. 3 ) has been modified to start with both a Prometheus data source and the Istio Dashboard installed. Within the Grafana user interface navigate to settings and select ‘Data Sources’ under the configuration section. 6 released on 2019-09-07. 1, sample dashboards are available by default in Grafana. org: Live Demo; tyler-wright. If you have a local installation of Grafana and wish to use Hosted Graphite as a data source, here’s how:. 4/Icons/Large. 0 and MapR Installer 1. After each time you change a color through a color picker you must click on empty space anywhere outside the color picker. grafana Documentation Release latest Jul 25, 2017. sudo dpkg -i grafana_4. There are also options for how queries are displayed, including graphs, tables. grafana_annotations - send ansible events as annotations on charts to grafana over http api If you notice any issues in this documentation,. How to share or present dashboards. As time series database, prometheus is often used in the world of monitoring system in combination with grafana, which is at the very basic a visualization tool for time series data. Click on the Grafana spiral icon at the top left of the web page and go to “Data Sources”. NAbox is a packaged solution that provides NetApp metrics collection, archiving and graphing in the same virtual appliance. Welcome to the StackLight InfluxDB-Grafana plugin for Fuel documentation! Edit on GitHub; Welcome to the StackLight InfluxDB-Grafana plugin for Fuel documentation!. **** Zabbix API documentation :http://192. Grafana is an open-source data visualization and monitoring tool that integrates with complex data from sources like Prometheus, InfluxDB, Graphite, and ElasticSearch. You can find the new Dashboard link on the right side of the Dashboard picker. The team at Grafana Labs is excited to hear from you on the plugin and the Marketplace offer. The Prometheus queries in Grafana are written using PromQL (Prometheus Query Language). To integrate Grafana with Zenduty, complete the following steps: In Zenduty: To add a new Grafana integration, go to "Teams" on Zenduty and click on the "Manage" button corresponding to the team you want to add the integration to. This will be our first series on how to do smart monitoring and visualization of your entire Infrastructure. Monitor your website, app, server, and container performance at any scale. Welcome to Hosted Graphite ¶. Our goal is not to have a very extensive documentation but rather have actual code that people can look at. Next, click on “Change Password”. This webinar provides an overview of the Exporter and demonstrates how to use it with Grafana 6. The documentation with a Table of Contents can be found in docs/. Select metrics from dropdown or start to type to filter results. In case you're not aware, Grafana is an open source metrics dashboard and graph editor. These provide a dashboard from which you can monitor both machine-level and cluster-level metrics. Grafana is a powerful dashboard building system that you can use to visualize performance metrics from the embedded Prometheus monitoring system. Grafana is most commonly used for visualizing time series data for Internet infrastructure and application analytics but many use it in other domains including industrial sensors, home automation, weather, and process control. Grafana is an open source data visualization tool that you can use to integrate data from many sources into one cohesive dashboard, and even use it to set up alerts. 5 6 7 8 9 # File 'lib/grafana/snapshot. There is a few steps to get the virtual appliance up and running : Deploy the virtual machine; Download NetApp Harvest and NMSDK from the NetApp web site; Use the web interface to install these products. com: How to Integrate Grafana with Zabbix 3. 0 is now released!) as part of HDF, a lot of of things are simplified using Apache Ambari to deploy NiFi and manage its configuration. After this is all configured, your Prometheus should be accessible over https. grafana-zabbix. The team at Grafana Labs is excited to hear from you on the plugin and the Marketplace offer. Once you have Promtail, Loki, and Grafana running, continue with our Getting Started Guide to get up and running with querying logs. When running Grafana master in production we strongly recommend that you use the grafana/grafana-dev:master- tag as that will guarantee that you use a specific version of Grafana instead of whatever was the most recent commit at the time. You can delve into the subject (recommended) by accessing Grafana's official documentation. As of MEP 1. You can use template variables for creating highly reusable and interactive dashboards. juju run-action --wait grafana/0 delete-user login=john Auth proxy. grafana-statefulset. Grafana is an analytics platform that enables you to query and visualize data, then create and share dashboards based on your visualizations. Click on “Metrics”. That port should not require extra Windows privileges. info (" Getting. Both platforms are good options and can even sometimes complement each other. net platform to distribute our extensions instead of maintaining system packages. If the check detects any Prettier issues, the build will not pass. Which contains all the information required to use the API like details about the function of. The team at Grafana Labs is excited to hear from you on the plugin and the Marketplace offer. Use the Grafana. Monitoring, reporting & alerting using leading tools such as Prometheus, Grafana, etc. At the Microsoft //build 2016 conference this year we created some great labs for the attendees to work on. You can save a lot of time by using these community-built dashboards, but be careful. To learn how to create a highly available Grafana set up, you can consult How to setup Grafana for High Availability from the official Grafana docs. If you ran into any problems, please refer to the Grafana documentation and use google to find more in-detail tutorials. net/80106C4/Gallery-Prod/cdn/2015-02-24/prod20161101-microsoft-windowsazure-gallery/grafana-labs. For now, you can install the plug in by simply cloning it into the plugins directory. Elasticsearch Service - Hosted Elasticsearch and Kibana; Elasticsearch Add-On for Heroku - Hosted Elasticsearch and Kibana for Heroku Users. Grafana + Rockset is ideal for things like creating visualizations on your Rockset collections and plotting timeseries data. npm install @grafana/ui. ini file to add the Azure Database for MySQL parameters. Copy your account ID and API key into the form fields in Grafana. Scaling Grafana is beyond the scope of this tutorial. To create a new dashboard, click the Home dropdown in the top left corner and select New. Grafana allows you to query, visualize, alert on and understand your metrics no matter where they are stored. The entire series will concentrate on tools like Grafana, Prometheus, InfluxDB, Telegraf and maybe others to come. It is a good idea to create and maintain the queries you use in your Grafana dashboards in Humio's UI. Learn the basics of using Grafana. Getting started. After enabling plugin you can add Zabbix data source. Once that is done I will update this documentation with the grafana-cli commands needed to install. Documentation. Cloud: Provision, Manage and Monitor the Elastic Stack. There are instructions for installing Grafana on a variety of platforms. Enable HTTPS is you are using an on-premises instance of Grafana. Information about how to access the raw data can be found in the Stats and Metrics documentation. Description. grafana Documentation Release latest Jul 25, 2017. Start Grafana by executing. # Cognite Grafana plug-in. https://106c4. Review the configuration and setup options. The talks were held in a breakout area next to their open plan office space, through which were pillars covered in monitors displaying various Grafana dashboards. Combining Influxdb+Grafana makes an easy to use database and a very flexible and good-looking dashboard for your next Raspberry Pi datalogger project. Grafana provides an Azure Data Explorer plugin , which enables you to connect to and visualize data from Azure Data Explorer. By the end of the article, you should be ready to use Grafana to create your own custom APM views. ini and uncomment the http_port configuration option and change it to something like 8080 or similar. grafana Documentation Release latest Jul 25, 2017. Grafana + Rockset is ideal for things like creating visualizations on your Rockset collections and plotting timeseries data. 3, the scalable, distributed time series database. Genie is an open source tool by Netflix that provides configuration-management capabilities and dynamic routing of jobs by abstracting access to the underlining Amazon EMR clusters. The grafana-server binary needs the working directory to be the root install directory (where the binary and the public folder is located). 4 + Propose new article. See package source for more details. Grafana is a powerful dashboard building system that you can use to visualize performance metrics from the embedded Prometheus monitoring system. Grafana is an open source data visualization tool that you can use to integrate data from many sources into one cohesive dashboard, and even use it to set up alerts. 4/Icons/Large. Grafana gets metrics from our metric database and allows us to. When you're happy with it, head over to Grafana in your Metricire account to add a new. grafana-zabbix. Documentation collectd 's documentation consists primarily of the manpages that come with the daemon, accompanied with some special documents on certain aspects. Copper COA Medal Zheng Bao 2019 PF70 Peking Opera Mintage:189 Copper China NGC COA. Grafana is an analytics platform that enables you to query and visualize data, then create and share dashboards based on your visualizations.