Book Image

VMware vSphere Troubleshooting

Book Image

VMware vSphere Troubleshooting

Overview of this book

VMware vSphere is the leading server virtualization platform with consistent management for virtual data centers. It enhances troubleshooting skills to diagnose and resolve day to day problems in your VMware vSphere infrastructure environment. This book will provide you practical hands-on knowledge of using different performance monitoring and troubleshooting tools to manage and troubleshoot the vSphere infrastructure. It begins by introducing systematic approach for troubleshooting different problems and show casing the troubleshooting techniques. You will be able to use the troubleshooting tools to monitor performance, and troubleshoot issues related to Hosts and Virtual Machines. Moving on, you will troubleshoot High Availability, storage I/O control problems, virtual LANS, and iSCSI, NFS, VMFS issues. By the end of this book, you will be able to analyze and solve advanced issues related to vShpere environment such as vcenter certificates, database problems, and different failed state errors.
Table of Contents (16 chapters)
VMware vSphere Troubleshooting
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Installing VMware vRealize Operations Manager
Power CLI - A Basic Reference
Index

Troubleshooting VMFS issues


VMFS is a high performance distributed filesystem. VMFS version 5 supports up to 60 TB of file size. Here are some important guidelines you should consider when working with VMFS volumes:

  • If you are not able to store files from 2 TB to 60 TB, make sure the partition table is using GPT instead of MBR. You can use partedUtil to view the partitioning.

  • The free space threshold value of a VMFS as suggested by VMware is 200 MB, and once 100 MB space is left, you will start having problems.

  • Always watch carefully how your space grows on a VMFS volume; if you have a less space, it will likely cause slow performance in issuing commands such as ls, copy, and so on.

  • Don't leave snapshots too long, and keep reclaiming the space by committing or removing the snapshots whenever it is possible. Snapshots keep growing and slow down the performance as well.

You can always use the vmkfstools command to manage and view the information about the VMFS volume, as seen in the following screenshot...