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MaxScale/Documentation/Release-Notes/MaxScale-2.2.1-Release-Notes.md
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# MariaDB MaxScale 2.2.1 Release Notes
Release 2.2.1 is a Beta release.
This document describes the changes in release 2.2.1, when compared to
release 2.2.0.
For any problems you encounter, please consider submitting a bug
report at [Jira](https://jira.mariadb.org).
## Changed Features
### Binlog server
- MariaDB 10 GTID is always enabled for slave connections.
- Automatically set binlog storage to 'tree' mode when
_mariadb10_master_gtid_ option is on.
## Dropped Features
## New Features
### REST API Relationship Endpoints
The _servers_, _monitors_ and _services_ types now support direct updating of
relationships via the `relationships` endpoints. This conforms to the JSON API
specification on updating resource relationships.
For more information, refer to the REST API documentation. An example of this
can be found in the
[Server Resource documentation](../REST-API/Resources-Server.md#update-server-relationships).
### PL/SQL Comaptibility
The parser of MaxScale has been extended to support the PL/SQL compatibility
features of the upcoming 10.3 release. For more information on how to enable
this mode, please refer to the
[configuration guide](../Getting-Started/Configuration-Guide.md#sql_mode).
This functionality was available already in MaxScale 2.2.0.
### Environment Variables in the configuration file
If the global configuration entry `substitute_variables` is set to true,
then if the first character of a value in the configuration file is a `$`
then everything following that is interpreted as an environment variable
and the configuration value is replaced with the value of the environment
variable. For more information please consult the
[Configuration Guide](../Getting-Started/Configuration-Guide.md).
## Bug fixes
[Here is a list of bugs fixed in MaxScale 2.2.1.](https://jira.mariadb.org/issues/?jql=project%20%3D%20MXS%20AND%20issuetype%20%3D%20Bug%20AND%20status%20%3D%20Closed%20AND%20fixVersion%20%3D%202.2.1)
## Known Issues and Limitations
There are some limitations and known issues within this version of MaxScale.
For more information, please refer to the [Limitations](../About/Limitations.md) document.
## Packaging
RPM and Debian packages are provided for the Linux distributions supported
by MariaDB Enterprise.
Packages can be downloaded [here](https://mariadb.com/resources/downloads).
## Source Code
The source code of MaxScale is tagged at GitHub with a tag, which is identical
with the version of MaxScale. For instance, the tag of version X.Y.Z of MaxScale
is X.Y.Z. Further, *master* always refers to the latest released non-beta version.
The source code is available [here](https://github.com/mariadb-corporation/MaxScale).