MySQL Fabric is a very promising sharding framework. If I take Ulf Wendel definition of MySQL Fabric :
MySQL Fabric is an administration tool to build large “farms” of MySQL servers. In its most basic form, a farm is a collection of MySQL Replication clusters. In its most advanced form, a farm is a collection of MySQL Replication clusters with sharding on top.
So MySQL Fabric takes care of two very orthogonal features :
- High availability of servers
- Sharding of data
Let us forget about sharding and look at the High availability infrastructure.
Servers are included in groups, called "High Availability Groups" when we talk about HA.
Each Server has an associated Status (or Role): primary secondary, spare
Each Server has also a mode : Offline, Read-only, and Read-Write.
The implementation has been made to allow various HA implementation patterns.
The most common HA pattern is the Master/Slave HA group ( in that case we should call it a "replica set" which is the terminology used in MongoDB or Facebook MySQL Pool Scanner (MPS).
Mats Kindahl in his blog post on MySQL Fabric High Availability Groups mentioned that other HA solutions are possible for an availability group :
- Shared Storage with SAN or NAS
- Replicated storage like DRBD
- MySQL Cluster shared nothing cluster
In the case of a HA group based on MySQL Cluster the group is self-managing regarding HA and MySQL Fabric does not handles the failover. With the "Shared Storage" and "Replicated storage" availability groups the secondary servers will be offline.
So one of my ideas that I hope is feasible would be to use MariaDB Galera Cluster as another HA solution with MySQL Fabric. The main advantage of this solution relates to the characteristics of MariaDB Galera Cluster. MariaDB Galera Cluster is an Active-active multi-master topology with synchronous replication. MariaDB Galera Cluster being innoDB based does not carry all the usage limitations associated with MySQL Cluster (main one being limited join capabilities).
Regarding to MySQL fabric the behavior of an availability group based on MariaDB Galera Cluster is identical to MySQL Cluster. It is a self-managing availability group.
MariaDB Galera Cluster
MySQL Fabric: A new kid in the MySQL sharding world 2013-10-09 Serge Frezefond
MySQL Fabric: High Availability Groups 2013-10-21 Mats Kindahl
A Brief Introduction to MySQL Fabric 2013-09-21 Mats Kindahl
MySQL Fabric - Sharding - Introduction 2013-09-21 VN (Narayanan Venkateswaran)
MySQL Fabric - Sharding - Simple Example 2013-09-22 VN (Narayanan Venkateswaran)
MySQL Fabric - Sharding - Shard Maintenance 2013-09-27 VN
MySQL Fabric - Sharding - Migrating From an Unsharded to a Sharded Setup 2013-09-22 VN
Installing MySQL Fabric on Windows 2013-10-03 Todd Farmer
MySQL 5.7 Fabric: any good? 2013-09-23 Ulf Wendel
Writing a Fault-tolerant Database Application using MySQL Fabric 2013-09-21 Alfranio Junior
Sharding PHP with MySQL Fabric 2013-10-09 Johannes Schlüter
MySQL Fabric support in Connector/Python 2013-09-22 Geert Vanderkelen
MySQL Connector/J with Fabric Support 2013-09-21 Jess Balint