Book Image

VMware Virtual SAN Cookbook

By : Jeffrey Taylor
Book Image

VMware Virtual SAN Cookbook

By: Jeffrey Taylor

Overview of this book

VMware Virtual SAN is a radically simple, hypervisor-converged storage, designed and optimized for vSphere virtual infrastructure. VMware introduced the software to help customers store more and more virtual machines. As data centers continue to evolve and grow, managing infrastructure becomes more challenging. Traditional storage solutions like monolithic storage arrays and complex management are often ill-suited to the needs of the modern data center. Software-defined storage solutions, like VMware Virtual SAN, integrate the storage side of the infrastructure with the server side, and can simplify management and improve flexibility. This book is a detailed guide which provides you with the knowledge you need to successfully implement and manage VMware VSAN and deployed infrastructures. You will start with an introduction to VSAN and object storage, before moving on to hardware selection, critical to a successful VSAN deployment. Next, you will discover how to prepare your existing infrastructure to support your VSAN deployment and explore Storage policy-Based Management, including policy changes, maintenance, validation, and troubleshooting VSAN. Finally, the book provides recipes to expedite the resolution process and gather all the information required to pursue a rapid resolution.
Table of Contents (13 chapters)
12
Index

VSAN rebuild logic and thresholds

VSAN object rebuilds due to a disk fault or failure

Internally, VSAN will initiate a rebuild of degraded components according to a schedule or in the event of a failure. Should a disk or disk group fail, the components on the affected disks will be immediately rebuilt if there is adequate capacity and enough nodes to comply with the policy decisions applied to the affected objects.

VSAN object rebuilds due to extended outage

In the absence of a physical fault, VSAN implements rebuild logic according to internal timers. When a node goes offline and exits the cluster, VSAN will take no action for 60 minutes. After one hour has passed, VSAN will assume that the node has exited permanently or semi-permanently and will begin to rebuild any degraded objects to restore fault-tolerance to the cluster. Re-entry of the node will not be forbidden, nor will it cause any problems.

VSAN object rebuilds during maintenance

The cluster departure timer is not disabled during...