> For the complete documentation index, see [llms.txt](https://docs.lenses.io/latest/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lenses.io/latest/k2k/readme/concepts-1.md).

# Free version restriction

The free version of the replicator has the following functional and throughput restrictions:

#### 1. Topic-Partition Limit

The replicator is restricted to processing a maximum of 5 topic-partitions per replication pipeline.

* This limit is the sum of partitions across all topics being replicated in a single application.
* If the total number of topic partitions exceeds 5, the replication pipeline will stop.

#### 2. Feature Restrictions

The following features are not supported in the free version:

* Exactly-Once Processing: Guaranteeing message delivery without duplicates is unavailable.
* Schema Mapping: The ability to transform or map schemas between source and destination topics is unavailable.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.lenses.io/latest/k2k/readme/concepts-1.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.