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Tech blog of j-labs' engineers. Experiences, knowledge, solutions.

Using InfluxDB to store performance metrics

InfluxDB it is a database oriented on time series. It was designed to accept large number of queries and write requests. It is perfect for storing timestamped data – data we would like to query by timestamp rather than index. It supports SQL-like language to easily pull data off as well as JSON requests through HTTP API. Influx uses tags and fields - tags to easily index series of data (you can query by it after where clause) and fields for keeping values (select field_1, field_2 from … )

Maciej Szafraniec

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13 Feb 2019

  Databases 

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Using InfluxDB to store performance metrics

13 Feb 2019 | Maciej Szafraniec

  Databases 

InfluxDB it is a database oriented on time series. It was designed to accept large number of queries and write requests. It is perfect for storing timestamped data – data we would like to query by timestamp rather than index. It supports SQL-like language to easily pull data off as well as JSON requests through HTTP API. Influx uses tags and fields - tags to easily index series of data (you can query by it after where clause) and fields for keeping values (select field_1, field_2 from … )

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4

Pytest - why it's more popular than unittest?

06 Feb 2019 | Karol Wybraniec

In my professional career I used to write tests with both frameworks: unittest and pytest. Both are great tools with certain pros and cons, but pytest is significantly more popular these days. In this short blogpost I am going to share with you a couple of pytest’s features, that in my opinion, provide the answer for the heading question.

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5

Parametrized tests - solutions overview (TestNG, JUnit4, JUnit5)

07 Nov 2018 | Paweł Proc

Parametrized tests are a lot easier to maintain. Usually when single requirement changes it’s enough to change one variable in the code. You don’t have to read the whole implementation of the test (If you know what your variable means).

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6

How to make Nigthwatch.js library work with async/await?

25 Oct 2018 | Paweł Proc

Although it's quite powerful tool, you need to customize it to get the full benefit of it. One of these improvements is usage of async/await commands (from Node 7.6 version). In this article I am going to show you how to adjust your code to make this commands work.

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7

The benefits of Code Reviews

10 Oct 2018 | Maciej Krzysica

Are you tired of scrolling through dozens of red and green files in code reviews, only to click “Reviewed” after a few minutes of staring at the screen? You should be. Because this is not the point of reviewing the code.

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8

Node.js module testing with Chai and Sinon framework

03 Oct 2018 | Grzegorz Wziątek

In this article I will show you how to write unit tests for Node.js modules and its dependencies from scratch.

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9

Sprint Retrospective as a reflection of the team working on the product

26 Sep 2018 | Aleksandra Stanković

  Agile 

The retrospective aims to analyse what happened during the last sprint. We take into account people and interactions between them, the delivery process, tools and operational systems. Our approach to the process is holistic. It is from a distant perspective that we start to reflect and analyse the events relevant to the process.

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10

Building Selenium framework in java (part IV) - answer job interview questions like a pro

19 Sep 2018 | Bartek Drzewiński

In my opinion, Software Developer in Test job interviews are one of the most demanding interviews in IT market. How come?

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11

First steps with Ansible

12 Sep 2018 | Łukasz Łoboda

  Cloud Python 

Ansible is an open source powerful automation tool used for configuration management, application deployment, orchestration and task automation. Let's create some Ansible config to see how it works.

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