New Release for Grafana ClickHouse Plugin

New Release for Grafana ClickHouse Plugin

Grafana is a very powerful and popular open source dashboard tool used in many ClickHouse projects. ClickHouse in Grafana is enabled by the Grafana ClickHouse plugin developed by the company Vertamedia, a ClickHouse early adopter.  Many users in the community…

Using ODBC with Clickhouse

Using ODBC with Clickhouse

20 Sept 2018This article shows different ways of how you can use ClickHouse in connection with other data sources to make queries use all of ClickHouse optimization features in order to make results come faster. Also, it is good practice…

Clickhouse-copier in practice

Clickhouse-copier in practice

Clickhouse-copier is a tool designed to copy data from one ClickHouse environment to another. The tool is a part of standard ClickHouse server distribution. It can work in a fully parallel mode and distribute the data in the most efficient…

Tableau with ClickHouse

Tableau with ClickHouse

ClickHouse users often require data to be accessed in a user-friendly way. There is a number of tools that can display big data using visualization effects, charts, filters, etc. Tableau is one of the popular ones. In this article, we…

Circular Replication Cluster Topology in ClickHouse

Circular Replication Cluster Topology in ClickHouse

In some cases, there is a need to configure a distributed cluster with replication but there are not enough servers in order to place every replica on a separate node. It is better to have multiple replicas at the same…

ClickTail Introduction

ClickTail Introduction

Altinity is happy to introduce ClickTail — an easy to use tool for ingesting log file data into ClickHouse and making it available for exploration. Its favorite format is JSON, but it understands how to parse a range of other well-known log…

Aggregate MySQL data at high speed with ClickHouse

Aggregate MySQL data at high speed with ClickHouse

Feb 12, 2018There are multiple ways how ClickHouse and MySQL can work together. External Dictionaries, ProxySQL support or [realtime streaming] of MySQL binary logs into ClickHouse. A few weeks ago ClickHouse team has released mysql() table function that allows to…

Logstash with ClickHouse

Logstash with ClickHouse

Dec 18, 2017  There are many cases where ClickHouse is a good or even the best solution for storing analytics data. One common example is web servers logs processing. In this article, we guide you through Nginx web server example…

ClickHouse vs Amazon RedShift Benchmark #2: STAR2002 dataset

Jul 3, 2017   We continue to benchmark ClickHouse against other analytic DBMSs. We were inspired by the benchmark with star2002 experiment dataset described here, and decided to replicate it using ClickHouse. That gives another interesting comparison vs Amazon RedShift.

ClickHouse Dictionaries Benchmarking

Apr 26, 2017   There are few ClickHouse benchmarks in the web already. Most of them use denormalized database schema. However, in denormalization is not always possible or desirable. In this article we will compare the query performance between denormalized and…