# Release Notes for Cluster Management API 1.6.0

Cluster Management API (CMAPI) 1.6.0 is a maintenance release of [CMAPI](/docs/release-notes/columnstore/cmapi.md). CMAPI is a REST API for administering [MariaDB ColumnStore](https://github.com/mariadb-corporation/docs-release-notes/blob/test/en/mariadb-columnstore/README.md) in multi-node topologies.

Cluster Management API 1.6.0 was released on 2021-12-13. This release is of General Availability (GA) maturity.

CMAPI 1.6.0 is compatible with MariaDB ColumnStore 5.6 and 6. CMAPI 1.6.0 was first released with [MariaDB ColumnStore 5.6.3](/docs/release-notes/columnstore/old-releases/mariadb-columnstore-5-6-release-notes/mariadb-columnstore-5-6-3-release-notes.md) and [MariaDB ColumnStore 6.2.2.](/docs/release-notes/columnstore/old-releases/mariadb-columnstore-6-release-notes/mariadb-columnstore-6-2-2-release-notes.md)

## Notable Changes

* CMAPI now disables the [ExeMgr process](/docs/analytics/mariadb-columnstore/architecture/mariadb-enterprise-columnstore-query-evaluation.md#exemgr-process-facility) on replica nodes to avoid unnecessary CPU usage. ([MCOL-4860](https://jira.mariadb.org/browse/MCOL-4860))
* To avoid conflicts between systemd and CMAPI, the mariadb-columnstore systemd unit is disabled when CMAPI is installed and re-enabled when CMAPI is uninstalled. ([MCOL-4938](https://jira.mariadb.org/browse/MCOL-4938))
* Some CMAPI Log messages have been clarified. ([MCOL-4851](https://jira.mariadb.org/browse/MCOL-4851))
* CMAPI properly applies configuration changes to multiple nodes. ([MCOL-4851](https://jira.mariadb.org/browse/MCOL-4851))
* Behavior for DBRM socket send and receive has been fixed. ([MCOL-4851](https://jira.mariadb.org/browse/MCOL-4851))
* The CMAPI configuration file is now automatically created by default if it is not found. ([MCOL-4851](https://jira.mariadb.org/browse/MCOL-4851))

## Platforms

In alignment with the MariaDB Corporation Engineering Policy, CMAPI 1.6.0 is provided for:

* CentOS 7 (x86\_64)
* Debian 9 (x86\_64)
* Debian 10 (x86\_64)
* Red Hat Enterprise Linux 7 (x86\_64)
* Red Hat Enterprise Linux 8 (x86\_64)
* SUSE Linux Enterprise Server 12 (x86\_64)
* SUSE Linux Enterprise Server 15 (x86\_64)
* Ubuntu 18.04 (x86\_64)
* Ubuntu 20.04 (x86\_64)

## Installation Instructions

* [ColumnStore Object Storage Topology with MariaDB Enterprise Server 10.5](/docs/server/architecture/topologies/columnstore-object-storage.md)[ and MariaDB ColumnStore 5](/docs/server/architecture/topologies/columnstore-object-storage.md)
* [ColumnStore Object Storage Topology with MariaDB Enterprise Server 10.6](/docs/server/architecture/topologies/columnstore-object-storage.md)[ and MariaDB ColumnStore 6](/docs/server/architecture/topologies/columnstore-object-storage.md)
* [ColumnStore Shared Local Storage Topology with MariaDB Enterprise Server 10.5](/docs/server/architecture/topologies/columnstore-shared-local-storage.md)[ and MariaDB ColumnStore 5](/docs/server/architecture/topologies/columnstore-shared-local-storage.md)
* [ColumnStore Shared Local Storage Topology with MariaDB Enterprise Server ](/docs/server/architecture/topologies/columnstore-shared-local-storage.md)[10](https://github.com/mariadb-corporation/mariadb-docs/blob/main/release-notes/columnstore/cmapi/broken-reference/README.md)[.](/docs/server/architecture/topologies/columnstore-shared-local-storage.md)[6](/docs/server/architecture/topologies/galera-cluster.md)[ and MariaDB ColumnStore 6](/docs/server/architecture/topologies/columnstore-shared-local-storage.md)

<sub>*This page is: Copyright © 2025 MariaDB. All rights reserved.*</sub>

{% @marketo/form formid="4316" formId="4316" %}


---

# Agent Instructions: 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://mariadb.com/docs/release-notes/columnstore/cmapi/release-notes-for-cluster-management-api-1-6-0.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.