The query syntax on Kibana is based on the Lucene Query syntax while Splunk uses its own Search Processing Language (SPL). It makes documents fully searchable while requiring more storage space Query Language It indexes the full contents of stored documents. Each document correlates a set of keys (names of fields or properties) with their corresponding values (strings, numbers, Booleans, dates, arrays of values, geolocations, or other types of data). This data is usually reduced to 15% of its original size, once compressed, to help Splunk store data efficiently.Įlasticsearch stores data as unstructured JSON documents. Buckets also contain compressed, raw data. These buckets contain data structures that enable Splunk to determine if the data includes terms or words. In Splunk, data is stored in indexes made up of file buckets. Both ELK and Splunk support on-premise and SaaS deployment, which means that the software can sit on the user’s physical data center and the user can also deploy these both to the cloud. Since Splunk is proprietary software, it is easier to configure and set up than the ELK Stack. Key differences between Elasticsearch and Splunk Set up and maintenance Now that we have an overview of both tools let’s discuss the key differences between them. The search head is the front-end web interface where these 3 components can be combined. The indexer manages all the indexing and search queries. The forwarder pushes data to a remote indexer. Three key components in Splunk are its forwarder, indexer, and search head. It is very easy to plug into a client’s product but comes with a hefty price structure. It is built and managed by a company with the same name which is totally focused on log analysis and observability. Splunk is not open-source like the ELK stack. The ELK stack allows users to ingest data from any source (integration of cloud environments is supported too) in any form and lets a user search, analyze, and visualize log data in real-time. It provides real-time histograms, line graphs, pie charts, and maps. Kibana provides a user interface that works on top of Elasticsearch and lets users analyze data using visualizations and dashboards. It is an open-source, data processing pipeline that ingests data from several sources simultaneously, transforms it, and then sends it to get collected. Logstash is used to aggregate and process data and send it to Elasticsearch. Elasticsearch is a NoSQL database built on the Lucene search engine. It is a powerful search engine that makes the search easier anywhere. Let’s have a brief overview of each of the components.Įlasticsearch does more than log analysis. These tools together create a powerful log analytic tool known as ELK stack and are maintained by Elastic (the company behind ELK stack). The ELK stack stands for Elasticsearch, Logstash, and Kibana, and now also includes Beats. Before comparing the two, let us first take an overview of both tools. In this article, we will be discussing two of the most popular software built for log management - Elasticsearch and Splunk. But this logging is only efficient when we have one-page or two-page applications where debugging through logs is relatively easy.īut while building large-size applications, quality logging requires a search where developers don’t have to comb through all the logs one by one. Developers around the world spend hours on building quality logging into their applications. From building to shipping, developers have to keep iterating the process to make improvements to the existing ones.
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