[MDEV-10266] Documentation - Add "MySQL Memcached Plugin" to "MariaDB versus MySQL - Compatibility" page Created: 2016-06-21  Updated: 2021-04-14  Resolved: 2017-08-21

Status: Closed
Project: MariaDB Server
Component/s: Documentation
Affects Version/s: N/A
Fix Version/s: N/A

Type: Bug Priority: Minor
Reporter: Chris Calender (Inactive) Assignee: Ian Gilfillan
Resolution: Fixed Votes: 0
Labels: None


 Description   

I'd like to request that we add something about the "MySQL Memcached Plugin" to the "MariaDB versus MySQL - Compatibility" page:

https://mariadb.com/kb/en/mariadb/mariadb-vs-mysql-compatibility/

MariaDB does not support Memcached plugin, which is mentioned here:

https://mariadb.com/blog/mysql-56-vs-mariadb-100
https://mariadb.com/blog/mariadb-10-vs-mysql-56-feature-comparison-update

But it is not on a standard manual page, and the "MariaDB versus MySQL - Compatibility" page would make a good place for it.

An additional side note, and perhaps could be included somehow, is that customers are able to retrieve memcached stored data since the data is stored as InnoDB tables. MariaDB will startup, and will log an error message stating it cannot find the libmemcached.so library:

[ERROR] Can't open shared library '/.../mariadb-10.1.14/lib/plugin/libmemcached.so' (errno: 0, cannot open shared object file: No such file or directory)



 Comments   
Comment by Ian Gilfillan [ 2016-06-22 ]

I have added a note on the compatibility page. Can you explain more what you mean by "able to retrieve"?

Comment by Otto Kekäläinen [ 2021-04-14 ]

MySQL 5.6 introduced a plugin that implements a daemon service that exposes data from InnoDB tables through the memcached protocol. Apparently MariaDB does not have this. There is no such plugin in sources at https://github.com/MariaDB/server/tree/10.6/plugin

See https://dev.mysql.com/doc/refman/8.0/en/innodb-memcached.html

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