Let’s Encrypt has announced that it will no longer send certificate expiration notification emails. What now?

What is Syslog: Daemons, Message Formats and Protocols

Pretty much everyone's heard about syslog: with its roots in the 80s, it's still used for a lot of the log management done today. Mostly because of its long history, syslog

Making Elasticsearch in Docker Swarm Elastic

Running Elasticsearch in Docker containers sounds like a natural fit - both technologies promise elasticity. However, running a truly elastic Elasticsearch cluster on Docker Swarm became somewhat difficult with Docker

Introducing Sematable – ReactJS & Redux Table

Back in 2011 - more than half a decade ago(!) - we’ve reviewed Top JavaScript Dynamic Table Libraries.  Clearly, a lot has changed since then.  Earlier this year, we started

Running Solr in Docker: How & Why

Docker is all the rage these days, but one doesn't hear about running Solr on Docker very much. Last month, we gave a talk on the topic of running containerized

Exploring Windows Kernel with Fibratus and Sematext

This is a guest post by Nedim Šabić, developer of Fibratus, a tool for exploration and tracing of the Windows kernel.  Unlike Linux / UNIX environments which provide a plethora of open

Elasticsearch for logs and metrics: A deep dive

We are known worldwide for our Elasticsearch, ELK stack and Solr consulting services, and we are always happy to help others improve their skills in these technologies, not only through

Tuning Solr & Pipeline for Logs – Video & Slides

Not everyone uses Splunk or ELK stack for logs. A few weeks ago, at the Lucene/Solr Revolution conference in Boston, we gave a talk about using Solr for logging, along

Handling Shards in SolrCloud

Last updated on Jan 10, 2018 One of the things you learn when attending Sematext Solr training is how to scale Solr. We discuss various topics regarding leader shards and

Elastic Stack Import-Export with Logstash & Logsene

In earlier posts, we explained how one can reindex data from one Elasticsearch cluster to another, or within the same Elasticsearch cluster, via tools like Logstash and rsyslog. The same

DocValues Reindexing with Solr Streaming Expressions

Last updated on Jan 8, 2018 Last time, when talking about Solr 6 we learned how to use streaming expressions to automatically update data in a collection. You can imagine

Reindexing Data with Elasticsearch

Last updated on Jan 8, 2018 SIDE NOTE: We run Elasticsearch and ELK trainings, which may be of interest to you and your teammates. Sooner or later, you'll run into

Sending AWS CloudWatch/VPC Logs to Logsene

Use-case: you're using AWS VPC and want visibility over the connection to your VPC. Which IPs are allowed or denied connections to certain ports, how much traffic goes through each

How to Ship Heroku Logs to Logsene / Managed ELK Stack

Update: We made it much easier to ship Heroku logs. Please read 5 Minute Recipe: Heroku Log Drain Setup for more details.  Heroku is a cloud platform based on a managed

Sending your Windows Event Logs to Sematext using NxLog and Logstash

UPDATE: There is a much easier way to ship your Windows events to Sematext now. See the New Windows logs integration update. There are a lot of sources of logs

How to forward CloudTrail (or other logs from AWS S3) to Logsene

This recipe shows how to send CloudTrail logs (which are .gz logs that AWS puts in a certain S3 bucket) to a Logsene application, but should apply to any kinds

Using Grafana with Elasticsearch for Log Analytics

Grafana is an open-source alternative to Kibana. Grafana is best known as a visualization / dashboarding tool focused on graphing metrics from various data sources, such as InfluxDB. Even though

Presentation: Large Scale Log Analytics with Solr

In this presentation from Lucene/Solr Revolution 2015, Sematext engineers -- and Solr and centralized logging experts -- Radu Gheorghe and Rafal Kuć talk about searching and analyzing time-based data at

Presentation: Log Analysis with Elasticsearch

Fresh from the Velocity NYC conference is the latest presentation from Sematext engineers Rafal Kuć and Radu Gheorghe — “From zero to production hero: Log Analysis with Elasticsearch.” The talk