computer science

XorMon

XorMon is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand XorMon rather than just read about it. In short: XorMon is an open-source IT infrastructure monitoring tool developed by the Czech software company Xorux. It is designed to monitor performance and health across various IT layers, including servers, storage, SAN, LAN, databases, and cloud environments.

Key takeaways

XorMon belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect XorMon to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of XorMon from memory before moving on to harder problems.

Reference excerpt

XorMon is an open-source IT infrastructure monitoring tool developed by the Czech software company Xorux. It is designed to monitor performance and health across various IT layers, including servers, storage, SAN, LAN, databases, and cloud environments. The software is also provides specialized monitoring for IBM i and AIX, alongside standard platforms like VMware and Linux. XorMon serves as a unified successor to the company's previous monitoring tools, LPAR2RRD and STOR2RRD, combining their functionalities into a single interface.

History Xorux was founded in Prague in October 2013 by Pavel Hampl, a former IBM system administrator. The company's original tools, LPAR2RRD and STOR2RRD, relied on RRDtool (Round Robin Database) for data storage and graphing. XorMon was first introduced in October 2020 and later in March 2021 alongside LPAR2RRD version 7.10. The original version acted as a unified front-end user interface that sat on top of existing LPAR2RRD and STOR2RRD instances. This allowed users to view data from both tools in a single dashboard while relying on the legacy backends. In April 2024, Xorux developed a complete rewrite of the software also known as XorMon NG. XorMon NG uses a modern technology stack, replacing RRDtool with TimescaleDB for data storage, and introduces a microservices architecture. Version 2.0 was released in October 2025.

Features XorMon provides full-stack monitoring capabilities, collecting performance metrics from hardware and software vendors. It is frequently adopted by Managed Service Providers (MSPs) who need to manage diverse fleets of systems.

Multi-vendor support: The tool supports technologies including VMware, Microsoft Hyper-V, Nutanix, Oracle Database, and cloud platforms like AWS and Microsoft Azure. It maintains strong support for IBM legacy systems, offering detailed metrics for IBM i (AS/400) ASPs, LPARs, and AIX. Topology: XorMon includes a visualization feature that maps the relationships between virtualization layers, physical servers, SAN switches, and storage arrays, allowing administrators to trace connectivity and performance bottlenecks. Interactive graphs: The interface uses JavaScript libraries to provide interactive charts that allow zooming and filtering, a departure from the static images of previous versions. Backup monitoring: Recent versions monitor backup jobs and status for platforms like Veeam, Veritas, and IBM Storage Protect.

Architecture and deployment XorMon is built on an open-source stack designed for scalability:

Front end: React.js and Plotly.js Back end: Node.js, NestJS, and Python Database: TimescaleDB (based on PostgreSQL) The software is typically deployed as a pre-configured virtual appliance (OVA) or as a Docker container.

Worked examples

Example 1 — a first encounter with XorMon

Start with the simplest possible case. Write down what XorMon claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to XorMon before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about XorMon ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of XorMon

In research: XorMon appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses XorMon in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: XorMon is common in secondary-school and first-year university syllabi. It links to neighbouring topics Software using the GNU General Public License, Storage software, Virtualization, so understanding it makes those chapters shorter.
In everyday life: Look for XorMon outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study XorMon in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what XorMon means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain XorMon out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is XorMon in simple terms?

Why does XorMon matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study XorMon?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on XorMon.