Book Image

CentOS High Performance

By : Gabriel Cánepa
Book Image

CentOS High Performance

By: Gabriel Cánepa

Overview of this book

CentOS is the enterprise level Linux OS, which is 100% binary compatible to Red Hat Enterprise Linux (RHEL). It acts as a free alternative to RedHat's commercial Linux offering, with only a change in the branding. A high performance cluster consists in a group of computers that work together as one set parallel, hence minimizing or eliminating the downtime of critical services and enhancing the performance of the application. Starting with the basic principles of clustering, you will learn the necessary steps to install a cluster with two CentOS 7 servers. We will then set up and configure the basic required network infrastructure and clustering services. Further, you will learn how to take a proactive approach to the split-brain issue by configuring the failover and fencing of the cluster as a whole and the quorum of each node individually. Further, we will be setting up HAC and HPC clusters as a web server and a database server. You will also master the art of monitoring performance and availability, identifying bottlenecks, and exploring troubleshooting techniques. At the end of the book, you’ll review performance-tuning techniques for the recently installed cluster, test performance using a payload simulation, and learn the necessary skills to ensure that the systems, and the corresponding resources and services, are being utilized to their best capacity.
Table of Contents (13 chapters)
CentOS High Performance
About the Author
About the Reviewers

ELRepo repository and DRBD availability

ELRepo is a community repository for Linux distributions that are compatible with Red Hat Enterprise Linux, which CentOS and Scientific Linux are derivatives of. ELRepo has hardware-related packages (especially drivers) as the primary focus in order to enhance or provide functionality that is not present in the current kernel. Thus, by installing the corresponding package, you save yourself from the pain of having to recompile the kernel only to add a certain feature, or having to wait for it to be supported by upstream repositories, or for the feature to be included in a later kernel release. The ELRepo repository is maintained by active members of the related distributions (RHEL, CentOS, and Scientific Linux).

DBRD, as made available by ELRepo, is intended primarily to evaluate and get experience with DRBD on RHEL-based platforms, but is not officially supported by Red Hat and LINBIT, the creators of DRBD. However, following the procedures outlined...