This tutorial will walk through the setup and configuration of GlusterFS and CTDB to provide highly available file storage via CIFS. GlusterFS is used to replicate data between multiple servers. CTDB provides highly available CIFS/Samba functionality. Prerequisites: 2 servers (virtual or physical) with RHEL 6 or derivative (CentOS, Scientific Linux). When installing create a partition …read more

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Amazon Web Services provides an highly available hosting for our applications but are they prepared to run on more than one server? When you design a new application, you can follow best practices’ guides on AWS but if the application is inherited, it requires many modifications or to work with a POSIX shared storage as if it’s local. That’s where GlusterFS enters the game, beside adding flexibility to storage with horizontal growth opportunities in distributed mode, it has a replicated mode, which lets you replicate a volume (or a single folder in a file system) across multiple servers. Preliminary considerations Before realizing a proof of concept with two servers, in different availability zones, replicating an EBS volume with an ext4 filesystem, we will list the cases where GlusterFS should not be used: Sequential files written simultaneously from multiple servers such as logs. The locking system can lead to serious problems if you store … Continued

Distributed Replicated Storage Across Four Storage Nodes With GlusterFS 3.2.x On CentOS 6.3

This tutorial shows how to combine four single storage servers (running CentOS 6.3) to a distributed replicated storage with GlusterFS. Nodes 1 and 2 (replicat…